| Message ID | 20240618225210.825290-1-allen.lkml@gmail.com (mailing list archive) |
|---|---|
| State | Superseded |
| Delegated to: | Geert Uytterhoeven |
| Headers | show |
| Series | [v3] mmc: Convert from tasklet to BH workqueue | expand |
On Wed, 19 Jun 2024 at 00:52, Allen Pais <allen.lkml@gmail.com> wrote: > > The only generic interface to execute asynchronously in the BH context is > tasklet; however, it's marked deprecated and has some design flaws. To > replace tasklets, BH workqueue support was recently added. A BH workqueue > behaves similarly to regular workqueues except that the queued work items > are executed in the BH context. > > This patch converts drivers/mmc/* from tasklet to BH workqueue. > > Based on the work done by Tejun Heo <tj@kernel.org> > > Tested-by: Christian Loehle <christian.loehle@arm.com> > Tested-by: Aubin Constans <aubin.constans@microchip.com> > Acked-by: Aubin Constans <aubin.constans@microchip.com> > Acked-by: Michał Mirosław <mirq-linux@rere.qmqm.pl> > Reviewed-by: Christian Loehle <christian.loehle@arm.com> > Signed-off-by: Allen Pais <allen.lkml@gmail.com> Applied for next to get it tested (waiting for Adrian's ack/nack in the meantime), thanks! Kind regards Uffe > --- > v3: > - fixed a comment - [Adrian Hunter] > v2: > - fixed patch styling issues > - rename work to bh_work > > Link to v1: > https://lore.kernel.org/all/20240327160314.9982-10-apais@linux.microsoft.com/ > > drivers/mmc/host/atmel-mci.c | 35 ++++----- > drivers/mmc/host/au1xmmc.c | 37 +++++----- > drivers/mmc/host/cb710-mmc.c | 14 ++-- > drivers/mmc/host/cb710-mmc.h | 3 +- > drivers/mmc/host/dw_mmc.c | 24 +++--- > drivers/mmc/host/dw_mmc.h | 9 ++- > drivers/mmc/host/omap.c | 17 +++-- > drivers/mmc/host/renesas_sdhi.h | 3 +- > drivers/mmc/host/renesas_sdhi_internal_dmac.c | 24 +++--- > drivers/mmc/host/renesas_sdhi_sys_dmac.c | 9 +-- > drivers/mmc/host/sdhci-bcm-kona.c | 2 +- > drivers/mmc/host/tifm_sd.c | 15 ++-- > drivers/mmc/host/tmio_mmc.h | 3 +- > drivers/mmc/host/tmio_mmc_core.c | 4 +- > drivers/mmc/host/uniphier-sd.c | 12 +-- > drivers/mmc/host/via-sdmmc.c | 25 ++++--- > drivers/mmc/host/wbsd.c | 74 +++++++++---------- > drivers/mmc/host/wbsd.h | 10 +-- > 18 files changed, 163 insertions(+), 157 deletions(-) > > diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c > index 8199d9620075..6490df54a6f5 100644 > --- a/drivers/mmc/host/atmel-mci.c > +++ b/drivers/mmc/host/atmel-mci.c > @@ -33,6 +33,7 @@ > #include <linux/pm.h> > #include <linux/pm_runtime.h> > #include <linux/pinctrl/consumer.h> > +#include <linux/workqueue.h> > > #include <asm/cacheflush.h> > #include <asm/io.h> > @@ -272,12 +273,12 @@ struct atmel_mci_dma { > * EVENT_DATA_ERROR is pending. > * @stop_cmdr: Value to be loaded into CMDR when the stop command is > * to be sent. > - * @tasklet: Tasklet running the request state machine. > + * @bh_work: Work running the request state machine. > * @pending_events: Bitmask of events flagged by the interrupt handler > - * to be processed by the tasklet. > + * to be processed by the work. > * @completed_events: Bitmask of events which the state machine has > * processed. > - * @state: Tasklet state. > + * @state: Work state. > * @queue: List of slots waiting for access to the controller. > * @need_clock_update: Update the clock rate before the next request. > * @need_reset: Reset controller before next request. > @@ -352,7 +353,7 @@ struct atmel_mci { > u32 data_status; > u32 stop_cmdr; > > - struct tasklet_struct tasklet; > + struct work_struct bh_work; > unsigned long pending_events; > unsigned long completed_events; > enum atmel_mci_state state; > @@ -735,7 +736,7 @@ static void atmci_timeout_timer(struct timer_list *t) > host->need_reset = 1; > host->state = STATE_END_REQUEST; > smp_wmb(); > - tasklet_schedule(&host->tasklet); > + queue_work(system_bh_wq, &host->bh_work); > } > > static inline unsigned int atmci_ns_to_clocks(struct atmel_mci *host, > @@ -958,7 +959,7 @@ static void atmci_pdc_complete(struct atmel_mci *host) > > dev_dbg(dev, "(%s) set pending xfer complete\n", __func__); > atmci_set_pending(host, EVENT_XFER_COMPLETE); > - tasklet_schedule(&host->tasklet); > + queue_work(system_bh_wq, &host->bh_work); > } > > static void atmci_dma_cleanup(struct atmel_mci *host) > @@ -972,7 +973,7 @@ static void atmci_dma_cleanup(struct atmel_mci *host) > } > > /* > - * This function is called by the DMA driver from tasklet context. > + * This function is called by the DMA driver from bh context. > */ > static void atmci_dma_complete(void *arg) > { > @@ -995,7 +996,7 @@ static void atmci_dma_complete(void *arg) > if (data) { > dev_dbg(dev, "(%s) set pending xfer complete\n", __func__); > atmci_set_pending(host, EVENT_XFER_COMPLETE); > - tasklet_schedule(&host->tasklet); > + queue_work(system_bh_wq, &host->bh_work); > > /* > * Regardless of what the documentation says, we have > @@ -1008,7 +1009,7 @@ static void atmci_dma_complete(void *arg) > * haven't seen all the potential error bits yet. > * > * The interrupt handler will schedule a different > - * tasklet to finish things up when the data transfer > + * bh work to finish things up when the data transfer > * is completely done. > * > * We may not complete the mmc request here anyway > @@ -1745,9 +1746,9 @@ static void atmci_detect_change(struct timer_list *t) > } > } > > -static void atmci_tasklet_func(struct tasklet_struct *t) > +static void atmci_work_func(struct work_struct *t) > { > - struct atmel_mci *host = from_tasklet(host, t, tasklet); > + struct atmel_mci *host = from_work(host, t, bh_work); > struct mmc_request *mrq = host->mrq; > struct mmc_data *data = host->data; > struct device *dev = host->dev; > @@ -1759,7 +1760,7 @@ static void atmci_tasklet_func(struct tasklet_struct *t) > > state = host->state; > > - dev_vdbg(dev, "tasklet: state %u pending/completed/mask %lx/%lx/%x\n", > + dev_vdbg(dev, "bh_work: state %u pending/completed/mask %lx/%lx/%x\n", > state, host->pending_events, host->completed_events, > atmci_readl(host, ATMCI_IMR)); > > @@ -2118,7 +2119,7 @@ static irqreturn_t atmci_interrupt(int irq, void *dev_id) > dev_dbg(dev, "set pending data error\n"); > smp_wmb(); > atmci_set_pending(host, EVENT_DATA_ERROR); > - tasklet_schedule(&host->tasklet); > + queue_work(system_bh_wq, &host->bh_work); > } > > if (pending & ATMCI_TXBUFE) { > @@ -2187,7 +2188,7 @@ static irqreturn_t atmci_interrupt(int irq, void *dev_id) > smp_wmb(); > dev_dbg(dev, "set pending notbusy\n"); > atmci_set_pending(host, EVENT_NOTBUSY); > - tasklet_schedule(&host->tasklet); > + queue_work(system_bh_wq, &host->bh_work); > } > > if (pending & ATMCI_NOTBUSY) { > @@ -2196,7 +2197,7 @@ static irqreturn_t atmci_interrupt(int irq, void *dev_id) > smp_wmb(); > dev_dbg(dev, "set pending notbusy\n"); > atmci_set_pending(host, EVENT_NOTBUSY); > - tasklet_schedule(&host->tasklet); > + queue_work(system_bh_wq, &host->bh_work); > } > > if (pending & ATMCI_RXRDY) > @@ -2211,7 +2212,7 @@ static irqreturn_t atmci_interrupt(int irq, void *dev_id) > smp_wmb(); > dev_dbg(dev, "set pending cmd rdy\n"); > atmci_set_pending(host, EVENT_CMD_RDY); > - tasklet_schedule(&host->tasklet); > + queue_work(system_bh_wq, &host->bh_work); > } > > if (pending & (ATMCI_SDIOIRQA | ATMCI_SDIOIRQB)) > @@ -2487,7 +2488,7 @@ static int atmci_probe(struct platform_device *pdev) > > host->mapbase = regs->start; > > - tasklet_setup(&host->tasklet, atmci_tasklet_func); > + INIT_WORK(&host->bh_work, atmci_work_func); > > ret = request_irq(irq, atmci_interrupt, 0, dev_name(dev), host); > if (ret) { > diff --git a/drivers/mmc/host/au1xmmc.c b/drivers/mmc/host/au1xmmc.c > index b5a5c6a2fe8b..6e80bcb668ec 100644 > --- a/drivers/mmc/host/au1xmmc.c > +++ b/drivers/mmc/host/au1xmmc.c > @@ -42,6 +42,7 @@ > #include <linux/leds.h> > #include <linux/mmc/host.h> > #include <linux/slab.h> > +#include <linux/workqueue.h> > > #include <asm/io.h> > #include <asm/mach-au1x00/au1000.h> > @@ -113,8 +114,8 @@ struct au1xmmc_host { > > int irq; > > - struct tasklet_struct finish_task; > - struct tasklet_struct data_task; > + struct work_struct finish_bh_work; > + struct work_struct data_bh_work; > struct au1xmmc_platform_data *platdata; > struct platform_device *pdev; > struct resource *ioarea; > @@ -253,9 +254,9 @@ static void au1xmmc_finish_request(struct au1xmmc_host *host) > mmc_request_done(host->mmc, mrq); > } > > -static void au1xmmc_tasklet_finish(struct tasklet_struct *t) > +static void au1xmmc_finish_bh_work(struct work_struct *t) > { > - struct au1xmmc_host *host = from_tasklet(host, t, finish_task); > + struct au1xmmc_host *host = from_work(host, t, finish_bh_work); > au1xmmc_finish_request(host); > } > > @@ -363,9 +364,9 @@ static void au1xmmc_data_complete(struct au1xmmc_host *host, u32 status) > au1xmmc_finish_request(host); > } > > -static void au1xmmc_tasklet_data(struct tasklet_struct *t) > +static void au1xmmc_data_bh_work(struct work_struct *t) > { > - struct au1xmmc_host *host = from_tasklet(host, t, data_task); > + struct au1xmmc_host *host = from_work(host, t, data_bh_work); > > u32 status = __raw_readl(HOST_STATUS(host)); > au1xmmc_data_complete(host, status); > @@ -425,7 +426,7 @@ static void au1xmmc_send_pio(struct au1xmmc_host *host) > if (host->flags & HOST_F_STOP) > SEND_STOP(host); > > - tasklet_schedule(&host->data_task); > + queue_work(system_bh_wq, &host->data_bh_work); > } > } > > @@ -505,7 +506,7 @@ static void au1xmmc_receive_pio(struct au1xmmc_host *host) > if (host->flags & HOST_F_STOP) > SEND_STOP(host); > > - tasklet_schedule(&host->data_task); > + queue_work(system_bh_wq, &host->data_bh_work); > } > } > > @@ -561,7 +562,7 @@ static void au1xmmc_cmd_complete(struct au1xmmc_host *host, u32 status) > > if (!trans || cmd->error) { > IRQ_OFF(host, SD_CONFIG_TH | SD_CONFIG_RA | SD_CONFIG_RF); > - tasklet_schedule(&host->finish_task); > + queue_work(system_bh_wq, &host->finish_bh_work); > return; > } > > @@ -797,7 +798,7 @@ static irqreturn_t au1xmmc_irq(int irq, void *dev_id) > IRQ_OFF(host, SD_CONFIG_NE | SD_CONFIG_TH); > > /* IRQ_OFF(host, SD_CONFIG_TH | SD_CONFIG_RA | SD_CONFIG_RF); */ > - tasklet_schedule(&host->finish_task); > + queue_work(system_bh_wq, &host->finish_bh_work); > } > #if 0 > else if (status & SD_STATUS_DD) { > @@ -806,7 +807,7 @@ static irqreturn_t au1xmmc_irq(int irq, void *dev_id) > au1xmmc_receive_pio(host); > else { > au1xmmc_data_complete(host, status); > - /* tasklet_schedule(&host->data_task); */ > + /* queue_work(system_bh_wq, &host->data_bh_work); */ > } > } > #endif > @@ -854,7 +855,7 @@ static void au1xmmc_dbdma_callback(int irq, void *dev_id) > if (host->flags & HOST_F_STOP) > SEND_STOP(host); > > - tasklet_schedule(&host->data_task); > + queue_work(system_bh_wq, &host->data_bh_work); > } > > static int au1xmmc_dbdma_init(struct au1xmmc_host *host) > @@ -1039,9 +1040,9 @@ static int au1xmmc_probe(struct platform_device *pdev) > if (host->platdata) > mmc->caps &= ~(host->platdata->mask_host_caps); > > - tasklet_setup(&host->data_task, au1xmmc_tasklet_data); > + INIT_WORK(&host->data_bh_work, au1xmmc_data_bh_work); > > - tasklet_setup(&host->finish_task, au1xmmc_tasklet_finish); > + INIT_WORK(&host->finish_bh_work, au1xmmc_finish_bh_work); > > if (has_dbdma()) { > ret = au1xmmc_dbdma_init(host); > @@ -1091,8 +1092,8 @@ static int au1xmmc_probe(struct platform_device *pdev) > if (host->flags & HOST_F_DBDMA) > au1xmmc_dbdma_shutdown(host); > > - tasklet_kill(&host->data_task); > - tasklet_kill(&host->finish_task); > + cancel_work_sync(&host->data_bh_work); > + cancel_work_sync(&host->finish_bh_work); > > if (host->platdata && host->platdata->cd_setup && > !(mmc->caps & MMC_CAP_NEEDS_POLL)) > @@ -1135,8 +1136,8 @@ static void au1xmmc_remove(struct platform_device *pdev) > __raw_writel(0, HOST_CONFIG2(host)); > wmb(); /* drain writebuffer */ > > - tasklet_kill(&host->data_task); > - tasklet_kill(&host->finish_task); > + cancel_work_sync(&host->data_bh_work); > + cancel_work_sync(&host->finish_bh_work); > > if (host->flags & HOST_F_DBDMA) > au1xmmc_dbdma_shutdown(host); > diff --git a/drivers/mmc/host/cb710-mmc.c b/drivers/mmc/host/cb710-mmc.c > index 0aec33b88bef..902f7f20abaa 100644 > --- a/drivers/mmc/host/cb710-mmc.c > +++ b/drivers/mmc/host/cb710-mmc.c > @@ -493,7 +493,7 @@ static void cb710_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq) > if (!cb710_mmc_command(mmc, mrq->cmd) && mrq->stop) > cb710_mmc_command(mmc, mrq->stop); > > - tasklet_schedule(&reader->finish_req_tasklet); > + queue_work(system_bh_wq, &reader->finish_req_bh_work); > } > > static int cb710_mmc_powerup(struct cb710_slot *slot) > @@ -646,10 +646,10 @@ static int cb710_mmc_irq_handler(struct cb710_slot *slot) > return 1; > } > > -static void cb710_mmc_finish_request_tasklet(struct tasklet_struct *t) > +static void cb710_mmc_finish_request_bh_work(struct work_struct *t) > { > - struct cb710_mmc_reader *reader = from_tasklet(reader, t, > - finish_req_tasklet); > + struct cb710_mmc_reader *reader = from_work(reader, t, > + finish_req_bh_work); > struct mmc_request *mrq = reader->mrq; > > reader->mrq = NULL; > @@ -718,8 +718,8 @@ static int cb710_mmc_init(struct platform_device *pdev) > > reader = mmc_priv(mmc); > > - tasklet_setup(&reader->finish_req_tasklet, > - cb710_mmc_finish_request_tasklet); > + INIT_WORK(&reader->finish_req_bh_work, > + cb710_mmc_finish_request_bh_work); > spin_lock_init(&reader->irq_lock); > cb710_dump_regs(chip, CB710_DUMP_REGS_MMC); > > @@ -763,7 +763,7 @@ static void cb710_mmc_exit(struct platform_device *pdev) > cb710_write_port_32(slot, CB710_MMC_CONFIG_PORT, 0); > cb710_write_port_16(slot, CB710_MMC_CONFIGB_PORT, 0); > > - tasklet_kill(&reader->finish_req_tasklet); > + cancel_work_sync(&reader->finish_req_bh_work); > > mmc_free_host(mmc); > } > diff --git a/drivers/mmc/host/cb710-mmc.h b/drivers/mmc/host/cb710-mmc.h > index 5e053077dbed..59abaccaad10 100644 > --- a/drivers/mmc/host/cb710-mmc.h > +++ b/drivers/mmc/host/cb710-mmc.h > @@ -8,10 +8,11 @@ > #define LINUX_CB710_MMC_H > > #include <linux/cb710.h> > +#include <linux/workqueue.h> > > /* per-MMC-reader structure */ > struct cb710_mmc_reader { > - struct tasklet_struct finish_req_tasklet; > + struct work_struct finish_req_bh_work; > struct mmc_request *mrq; > spinlock_t irq_lock; > unsigned char last_power_mode; > diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c > index 8e2d676b9239..7195de2cde44 100644 > --- a/drivers/mmc/host/dw_mmc.c > +++ b/drivers/mmc/host/dw_mmc.c > @@ -493,7 +493,7 @@ static void dw_mci_dmac_complete_dma(void *arg) > */ > if (data) { > set_bit(EVENT_XFER_COMPLETE, &host->pending_events); > - tasklet_schedule(&host->tasklet); > + queue_work(system_bh_wq, &host->bh_work); > } > } > > @@ -1834,7 +1834,7 @@ static enum hrtimer_restart dw_mci_fault_timer(struct hrtimer *t) > if (!host->data_status) { > host->data_status = SDMMC_INT_DCRC; > set_bit(EVENT_DATA_ERROR, &host->pending_events); > - tasklet_schedule(&host->tasklet); > + queue_work(system_bh_wq, &host->bh_work); > } > > spin_unlock_irqrestore(&host->irq_lock, flags); > @@ -2056,9 +2056,9 @@ static bool dw_mci_clear_pending_data_complete(struct dw_mci *host) > return true; > } > > -static void dw_mci_tasklet_func(struct tasklet_struct *t) > +static void dw_mci_work_func(struct work_struct *t) > { > - struct dw_mci *host = from_tasklet(host, t, tasklet); > + struct dw_mci *host = from_work(host, t, bh_work); > struct mmc_data *data; > struct mmc_command *cmd; > struct mmc_request *mrq; > @@ -2113,7 +2113,7 @@ static void dw_mci_tasklet_func(struct tasklet_struct *t) > * will waste a bit of time (we already know > * the command was bad), it can't cause any > * errors since it's possible it would have > - * taken place anyway if this tasklet got > + * taken place anyway if this bh work got > * delayed. Allowing the transfer to take place > * avoids races and keeps things simple. > */ > @@ -2706,7 +2706,7 @@ static void dw_mci_cmd_interrupt(struct dw_mci *host, u32 status) > smp_wmb(); /* drain writebuffer */ > > set_bit(EVENT_CMD_COMPLETE, &host->pending_events); > - tasklet_schedule(&host->tasklet); > + queue_work(system_bh_wq, &host->bh_work); > > dw_mci_start_fault_timer(host); > } > @@ -2774,7 +2774,7 @@ static irqreturn_t dw_mci_interrupt(int irq, void *dev_id) > set_bit(EVENT_DATA_COMPLETE, > &host->pending_events); > > - tasklet_schedule(&host->tasklet); > + queue_work(system_bh_wq, &host->bh_work); > > spin_unlock(&host->irq_lock); > } > @@ -2793,7 +2793,7 @@ static irqreturn_t dw_mci_interrupt(int irq, void *dev_id) > dw_mci_read_data_pio(host, true); > } > set_bit(EVENT_DATA_COMPLETE, &host->pending_events); > - tasklet_schedule(&host->tasklet); > + queue_work(system_bh_wq, &host->bh_work); > > spin_unlock(&host->irq_lock); > } > @@ -3098,7 +3098,7 @@ static void dw_mci_cmd11_timer(struct timer_list *t) > > host->cmd_status = SDMMC_INT_RTO; > set_bit(EVENT_CMD_COMPLETE, &host->pending_events); > - tasklet_schedule(&host->tasklet); > + queue_work(system_bh_wq, &host->bh_work); > } > > static void dw_mci_cto_timer(struct timer_list *t) > @@ -3144,7 +3144,7 @@ static void dw_mci_cto_timer(struct timer_list *t) > */ > host->cmd_status = SDMMC_INT_RTO; > set_bit(EVENT_CMD_COMPLETE, &host->pending_events); > - tasklet_schedule(&host->tasklet); > + queue_work(system_bh_wq, &host->bh_work); > break; > default: > dev_warn(host->dev, "Unexpected command timeout, state %d\n", > @@ -3195,7 +3195,7 @@ static void dw_mci_dto_timer(struct timer_list *t) > host->data_status = SDMMC_INT_DRTO; > set_bit(EVENT_DATA_ERROR, &host->pending_events); > set_bit(EVENT_DATA_COMPLETE, &host->pending_events); > - tasklet_schedule(&host->tasklet); > + queue_work(system_bh_wq, &host->bh_work); > break; > default: > dev_warn(host->dev, "Unexpected data timeout, state %d\n", > @@ -3435,7 +3435,7 @@ int dw_mci_probe(struct dw_mci *host) > else > host->fifo_reg = host->regs + DATA_240A_OFFSET; > > - tasklet_setup(&host->tasklet, dw_mci_tasklet_func); > + INIT_WORK(&host->bh_work, dw_mci_work_func); > ret = devm_request_irq(host->dev, host->irq, dw_mci_interrupt, > host->irq_flags, "dw-mci", host); > if (ret) > diff --git a/drivers/mmc/host/dw_mmc.h b/drivers/mmc/host/dw_mmc.h > index 4ed81f94f7ca..b504f7ae513a 100644 > --- a/drivers/mmc/host/dw_mmc.h > +++ b/drivers/mmc/host/dw_mmc.h > @@ -17,6 +17,7 @@ > #include <linux/fault-inject.h> > #include <linux/hrtimer.h> > #include <linux/interrupt.h> > +#include <linux/workqueue.h> > > enum dw_mci_state { > STATE_IDLE = 0, > @@ -89,12 +90,12 @@ struct dw_mci_dma_slave { > * @stop_cmdr: Value to be loaded into CMDR when the stop command is > * to be sent. > * @dir_status: Direction of current transfer. > - * @tasklet: Tasklet running the request state machine. > + * @bh_work: Work running the request state machine. > * @pending_events: Bitmask of events flagged by the interrupt handler > - * to be processed by the tasklet. > + * to be processed by bh work. > * @completed_events: Bitmask of events which the state machine has > * processed. > - * @state: Tasklet state. > + * @state: BH work state. > * @queue: List of slots waiting for access to the controller. > * @bus_hz: The rate of @mck in Hz. This forms the basis for MMC bus > * rate and timeout calculations. > @@ -194,7 +195,7 @@ struct dw_mci { > u32 data_status; > u32 stop_cmdr; > u32 dir_status; > - struct tasklet_struct tasklet; > + struct work_struct bh_work; > unsigned long pending_events; > unsigned long completed_events; > enum dw_mci_state state; > diff --git a/drivers/mmc/host/omap.c b/drivers/mmc/host/omap.c > index a8ee0df47148..335350a4e99a 100644 > --- a/drivers/mmc/host/omap.c > +++ b/drivers/mmc/host/omap.c > @@ -28,6 +28,7 @@ > #include <linux/slab.h> > #include <linux/gpio/consumer.h> > #include <linux/platform_data/mmc-omap.h> > +#include <linux/workqueue.h> > > > #define OMAP_MMC_REG_CMD 0x00 > @@ -105,7 +106,7 @@ struct mmc_omap_slot { > u16 power_mode; > unsigned int fclk_freq; > > - struct tasklet_struct cover_tasklet; > + struct work_struct cover_bh_work; > struct timer_list cover_timer; > unsigned cover_open; > > @@ -873,18 +874,18 @@ void omap_mmc_notify_cover_event(struct device *dev, int num, int is_closed) > sysfs_notify(&slot->mmc->class_dev.kobj, NULL, "cover_switch"); > } > > - tasklet_hi_schedule(&slot->cover_tasklet); > + queue_work(system_bh_highpri_wq, &slot->cover_bh_work); > } > > static void mmc_omap_cover_timer(struct timer_list *t) > { > struct mmc_omap_slot *slot = from_timer(slot, t, cover_timer); > - tasklet_schedule(&slot->cover_tasklet); > + queue_work(system_bh_wq, &slot->cover_bh_work); > } > > -static void mmc_omap_cover_handler(struct tasklet_struct *t) > +static void mmc_omap_cover_bh_handler(struct work_struct *t) > { > - struct mmc_omap_slot *slot = from_tasklet(slot, t, cover_tasklet); > + struct mmc_omap_slot *slot = from_work(slot, t, cover_bh_work); > int cover_open = mmc_omap_cover_is_open(slot); > > mmc_detect_change(slot->mmc, 0); > @@ -1314,7 +1315,7 @@ static int mmc_omap_new_slot(struct mmc_omap_host *host, int id) > > if (slot->pdata->get_cover_state != NULL) { > timer_setup(&slot->cover_timer, mmc_omap_cover_timer, 0); > - tasklet_setup(&slot->cover_tasklet, mmc_omap_cover_handler); > + INIT_WORK(&slot->cover_bh_work, mmc_omap_cover_bh_handler); > } > > r = mmc_add_host(mmc); > @@ -1333,7 +1334,7 @@ static int mmc_omap_new_slot(struct mmc_omap_host *host, int id) > &dev_attr_cover_switch); > if (r < 0) > goto err_remove_slot_name; > - tasklet_schedule(&slot->cover_tasklet); > + queue_work(system_bh_wq, &slot->cover_bh_work); > } > > return 0; > @@ -1356,7 +1357,7 @@ static void mmc_omap_remove_slot(struct mmc_omap_slot *slot) > if (slot->pdata->get_cover_state != NULL) > device_remove_file(&mmc->class_dev, &dev_attr_cover_switch); > > - tasklet_kill(&slot->cover_tasklet); > + cancel_work_sync(&slot->cover_bh_work); > del_timer_sync(&slot->cover_timer); > flush_workqueue(slot->host->mmc_omap_wq); > > diff --git a/drivers/mmc/host/renesas_sdhi.h b/drivers/mmc/host/renesas_sdhi.h > index 586f94d4dbfd..4fd2bfcacd76 100644 > --- a/drivers/mmc/host/renesas_sdhi.h > +++ b/drivers/mmc/host/renesas_sdhi.h > @@ -11,6 +11,7 @@ > > #include <linux/dmaengine.h> > #include <linux/platform_device.h> > +#include <linux/workqueue.h> > #include "tmio_mmc.h" > > struct renesas_sdhi_scc { > @@ -67,7 +68,7 @@ struct renesas_sdhi_dma { > dma_filter_fn filter; > void (*enable)(struct tmio_mmc_host *host, bool enable); > struct completion dma_dataend; > - struct tasklet_struct dma_complete; > + struct work_struct dma_complete; > }; > > struct renesas_sdhi { > diff --git a/drivers/mmc/host/renesas_sdhi_internal_dmac.c b/drivers/mmc/host/renesas_sdhi_internal_dmac.c > index 422fa63a2e99..5fd276492f80 100644 > --- a/drivers/mmc/host/renesas_sdhi_internal_dmac.c > +++ b/drivers/mmc/host/renesas_sdhi_internal_dmac.c > @@ -337,7 +337,7 @@ static bool renesas_sdhi_internal_dmac_dma_irq(struct tmio_mmc_host *host) > writel(status ^ dma_irqs, host->ctl + DM_CM_INFO1); > set_bit(SDHI_DMA_END_FLAG_DMA, &dma_priv->end_flags); > if (test_bit(SDHI_DMA_END_FLAG_ACCESS, &dma_priv->end_flags)) > - tasklet_schedule(&dma_priv->dma_complete); > + queue_work(system_bh_wq, &dma_priv->dma_complete); > } > > return status & dma_irqs; > @@ -352,7 +352,7 @@ renesas_sdhi_internal_dmac_dataend_dma(struct tmio_mmc_host *host) > set_bit(SDHI_DMA_END_FLAG_ACCESS, &dma_priv->end_flags); > if (test_bit(SDHI_DMA_END_FLAG_DMA, &dma_priv->end_flags) || > host->data->error) > - tasklet_schedule(&dma_priv->dma_complete); > + queue_work(system_bh_wq, &dma_priv->dma_complete); > } > > /* > @@ -440,9 +440,9 @@ renesas_sdhi_internal_dmac_start_dma(struct tmio_mmc_host *host, > renesas_sdhi_internal_dmac_enable_dma(host, false); > } > > -static void renesas_sdhi_internal_dmac_issue_tasklet_fn(unsigned long arg) > +static void renesas_sdhi_internal_dmac_issue_work_fn(struct work_struct *t) > { > - struct tmio_mmc_host *host = (struct tmio_mmc_host *)arg; > + struct tmio_mmc_host *host = from_work(host, t, dma_issue); > struct renesas_sdhi *priv = host_to_priv(host); > > tmio_mmc_enable_mmc_irqs(host, TMIO_STAT_DATAEND); > @@ -454,7 +454,7 @@ static void renesas_sdhi_internal_dmac_issue_tasklet_fn(unsigned long arg) > /* on CMD errors, simulate DMA end immediately */ > set_bit(SDHI_DMA_END_FLAG_DMA, &priv->dma_priv.end_flags); > if (test_bit(SDHI_DMA_END_FLAG_ACCESS, &priv->dma_priv.end_flags)) > - tasklet_schedule(&priv->dma_priv.dma_complete); > + queue_work(system_bh_wq, &priv->dma_priv.dma_complete); > } > } > > @@ -484,9 +484,9 @@ static bool renesas_sdhi_internal_dmac_complete(struct tmio_mmc_host *host) > return true; > } > > -static void renesas_sdhi_internal_dmac_complete_tasklet_fn(unsigned long arg) > +static void renesas_sdhi_internal_dmac_complete_work_fn(struct work_struct *t) > { > - struct tmio_mmc_host *host = (struct tmio_mmc_host *)arg; > + struct tmio_mmc_host *host = from_work(host, t, dma_complete); > > spin_lock_irq(&host->lock); > if (!renesas_sdhi_internal_dmac_complete(host)) > @@ -544,12 +544,10 @@ renesas_sdhi_internal_dmac_request_dma(struct tmio_mmc_host *host, > /* Each value is set to non-zero to assume "enabling" each DMA */ > host->chan_rx = host->chan_tx = (void *)0xdeadbeaf; > > - tasklet_init(&priv->dma_priv.dma_complete, > - renesas_sdhi_internal_dmac_complete_tasklet_fn, > - (unsigned long)host); > - tasklet_init(&host->dma_issue, > - renesas_sdhi_internal_dmac_issue_tasklet_fn, > - (unsigned long)host); > + INIT_WORK(&priv->dma_priv.dma_complete, > + renesas_sdhi_internal_dmac_complete_work_fn); > + INIT_WORK(&host->dma_issue, > + renesas_sdhi_internal_dmac_issue_work_fn); > > /* Add pre_req and post_req */ > host->ops.pre_req = renesas_sdhi_internal_dmac_pre_req; > diff --git a/drivers/mmc/host/renesas_sdhi_sys_dmac.c b/drivers/mmc/host/renesas_sdhi_sys_dmac.c > index 9cf7f9feab72..793595ad6d02 100644 > --- a/drivers/mmc/host/renesas_sdhi_sys_dmac.c > +++ b/drivers/mmc/host/renesas_sdhi_sys_dmac.c > @@ -312,9 +312,9 @@ static void renesas_sdhi_sys_dmac_start_dma(struct tmio_mmc_host *host, > } > } > > -static void renesas_sdhi_sys_dmac_issue_tasklet_fn(unsigned long priv) > +static void renesas_sdhi_sys_dmac_issue_work_fn(struct work_struct *t) > { > - struct tmio_mmc_host *host = (struct tmio_mmc_host *)priv; > + struct tmio_mmc_host *host = from_work(host, t, dma_issue); > struct dma_chan *chan = NULL; > > spin_lock_irq(&host->lock); > @@ -401,9 +401,8 @@ static void renesas_sdhi_sys_dmac_request_dma(struct tmio_mmc_host *host, > goto ebouncebuf; > > init_completion(&priv->dma_priv.dma_dataend); > - tasklet_init(&host->dma_issue, > - renesas_sdhi_sys_dmac_issue_tasklet_fn, > - (unsigned long)host); > + INIT_WORK(&host->dma_issue, > + renesas_sdhi_sys_dmac_issue_work_fn); > } > > renesas_sdhi_sys_dmac_enable_dma(host, true); > diff --git a/drivers/mmc/host/sdhci-bcm-kona.c b/drivers/mmc/host/sdhci-bcm-kona.c > index cb9152c6a65d..e067c7f5c537 100644 > --- a/drivers/mmc/host/sdhci-bcm-kona.c > +++ b/drivers/mmc/host/sdhci-bcm-kona.c > @@ -107,7 +107,7 @@ static void sdhci_bcm_kona_sd_init(struct sdhci_host *host) > * Software emulation of the SD card insertion/removal. Set insert=1 for insert > * and insert=0 for removal. The card detection is done by GPIO. For Broadcom > * IP to function properly the bit 0 of CORESTAT register needs to be set/reset > - * to generate the CD IRQ handled in sdhci.c which schedules card_tasklet. > +* to generate the CD IRQ handled in sdhci.c > */ > static int sdhci_bcm_kona_sd_card_emulate(struct sdhci_host *host, int insert) > { > diff --git a/drivers/mmc/host/tifm_sd.c b/drivers/mmc/host/tifm_sd.c > index b5a2f2f25ad9..aea14bf3e2e8 100644 > --- a/drivers/mmc/host/tifm_sd.c > +++ b/drivers/mmc/host/tifm_sd.c > @@ -13,6 +13,7 @@ > #include <linux/highmem.h> > #include <linux/scatterlist.h> > #include <linux/module.h> > +#include <linux/workqueue.h> > #include <asm/io.h> > > #define DRIVER_NAME "tifm_sd" > @@ -97,7 +98,7 @@ struct tifm_sd { > unsigned int clk_div; > unsigned long timeout_jiffies; > > - struct tasklet_struct finish_tasklet; > + struct work_struct finish_bh_work; > struct timer_list timer; > struct mmc_request *req; > > @@ -463,7 +464,7 @@ static void tifm_sd_check_status(struct tifm_sd *host) > } > } > finish_request: > - tasklet_schedule(&host->finish_tasklet); > + queue_work(system_bh_wq, &host->finish_bh_work); > } > > /* Called from interrupt handler */ > @@ -723,9 +724,9 @@ static void tifm_sd_request(struct mmc_host *mmc, struct mmc_request *mrq) > mmc_request_done(mmc, mrq); > } > > -static void tifm_sd_end_cmd(struct tasklet_struct *t) > +static void tifm_sd_end_cmd(struct work_struct *t) > { > - struct tifm_sd *host = from_tasklet(host, t, finish_tasklet); > + struct tifm_sd *host = from_work(host, t, finish_bh_work); > struct tifm_dev *sock = host->dev; > struct mmc_host *mmc = tifm_get_drvdata(sock); > struct mmc_request *mrq; > @@ -960,7 +961,7 @@ static int tifm_sd_probe(struct tifm_dev *sock) > */ > mmc->max_busy_timeout = TIFM_MMCSD_REQ_TIMEOUT_MS; > > - tasklet_setup(&host->finish_tasklet, tifm_sd_end_cmd); > + INIT_WORK(&host->finish_bh_work, tifm_sd_end_cmd); > timer_setup(&host->timer, tifm_sd_abort, 0); > > mmc->ops = &tifm_sd_ops; > @@ -999,7 +1000,7 @@ static void tifm_sd_remove(struct tifm_dev *sock) > writel(0, sock->addr + SOCK_MMCSD_INT_ENABLE); > spin_unlock_irqrestore(&sock->lock, flags); > > - tasklet_kill(&host->finish_tasklet); > + cancel_work_sync(&host->finish_bh_work); > > spin_lock_irqsave(&sock->lock, flags); > if (host->req) { > @@ -1009,7 +1010,7 @@ static void tifm_sd_remove(struct tifm_dev *sock) > host->req->cmd->error = -ENOMEDIUM; > if (host->req->stop) > host->req->stop->error = -ENOMEDIUM; > - tasklet_schedule(&host->finish_tasklet); > + queue_work(system_bh_wq, &host->finish_bh_work); > } > spin_unlock_irqrestore(&sock->lock, flags); > mmc_remove_host(mmc); > diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h > index de56e6534aea..63000d9c7030 100644 > --- a/drivers/mmc/host/tmio_mmc.h > +++ b/drivers/mmc/host/tmio_mmc.h > @@ -21,6 +21,7 @@ > #include <linux/scatterlist.h> > #include <linux/spinlock.h> > #include <linux/interrupt.h> > +#include <linux/workqueue.h> > > #define CTL_SD_CMD 0x00 > #define CTL_ARG_REG 0x04 > @@ -156,7 +157,7 @@ struct tmio_mmc_host { > bool dma_on; > struct dma_chan *chan_rx; > struct dma_chan *chan_tx; > - struct tasklet_struct dma_issue; > + struct work_struct dma_issue; > struct scatterlist bounce_sg; > u8 *bounce_buf; > > diff --git a/drivers/mmc/host/tmio_mmc_core.c b/drivers/mmc/host/tmio_mmc_core.c > index 93e912afd3ae..51bd2365795b 100644 > --- a/drivers/mmc/host/tmio_mmc_core.c > +++ b/drivers/mmc/host/tmio_mmc_core.c > @@ -608,7 +608,7 @@ static void tmio_mmc_cmd_irq(struct tmio_mmc_host *host, unsigned int stat) > } else { > tmio_mmc_disable_mmc_irqs(host, > TMIO_MASK_READOP); > - tasklet_schedule(&host->dma_issue); > + queue_work(system_bh_wq, &host->dma_issue); > } > } else { > if (!host->dma_on) { > @@ -616,7 +616,7 @@ static void tmio_mmc_cmd_irq(struct tmio_mmc_host *host, unsigned int stat) > } else { > tmio_mmc_disable_mmc_irqs(host, > TMIO_MASK_WRITEOP); > - tasklet_schedule(&host->dma_issue); > + queue_work(system_bh_wq, &host->dma_issue); > } > } > } else { > diff --git a/drivers/mmc/host/uniphier-sd.c b/drivers/mmc/host/uniphier-sd.c > index 1404989e6151..417fd13efdfd 100644 > --- a/drivers/mmc/host/uniphier-sd.c > +++ b/drivers/mmc/host/uniphier-sd.c > @@ -90,9 +90,9 @@ static void uniphier_sd_dma_endisable(struct tmio_mmc_host *host, int enable) > } > > /* external DMA engine */ > -static void uniphier_sd_external_dma_issue(struct tasklet_struct *t) > +static void uniphier_sd_external_dma_issue(struct work_struct *t) > { > - struct tmio_mmc_host *host = from_tasklet(host, t, dma_issue); > + struct tmio_mmc_host *host = from_work(host, t, dma_issue); > struct uniphier_sd_priv *priv = uniphier_sd_priv(host); > > uniphier_sd_dma_endisable(host, 1); > @@ -199,7 +199,7 @@ static void uniphier_sd_external_dma_request(struct tmio_mmc_host *host, > host->chan_rx = chan; > host->chan_tx = chan; > > - tasklet_setup(&host->dma_issue, uniphier_sd_external_dma_issue); > + INIT_WORK(&host->dma_issue, uniphier_sd_external_dma_issue); > } > > static void uniphier_sd_external_dma_release(struct tmio_mmc_host *host) > @@ -236,9 +236,9 @@ static const struct tmio_mmc_dma_ops uniphier_sd_external_dma_ops = { > .dataend = uniphier_sd_external_dma_dataend, > }; > > -static void uniphier_sd_internal_dma_issue(struct tasklet_struct *t) > +static void uniphier_sd_internal_dma_issue(struct work_struct *t) > { > - struct tmio_mmc_host *host = from_tasklet(host, t, dma_issue); > + struct tmio_mmc_host *host = from_work(host, t, dma_issue); > unsigned long flags; > > spin_lock_irqsave(&host->lock, flags); > @@ -317,7 +317,7 @@ static void uniphier_sd_internal_dma_request(struct tmio_mmc_host *host, > > host->chan_tx = (void *)0xdeadbeaf; > > - tasklet_setup(&host->dma_issue, uniphier_sd_internal_dma_issue); > + INIT_WORK(&host->dma_issue, uniphier_sd_internal_dma_issue); > } > > static void uniphier_sd_internal_dma_release(struct tmio_mmc_host *host) > diff --git a/drivers/mmc/host/via-sdmmc.c b/drivers/mmc/host/via-sdmmc.c > index ba6044b16e07..f77457105ec3 100644 > --- a/drivers/mmc/host/via-sdmmc.c > +++ b/drivers/mmc/host/via-sdmmc.c > @@ -12,6 +12,7 @@ > #include <linux/interrupt.h> > > #include <linux/mmc/host.h> > +#include <linux/workqueue.h> > > #define DRV_NAME "via_sdmmc" > > @@ -307,7 +308,7 @@ struct via_crdr_mmc_host { > struct sdhcreg pm_sdhc_reg; > > struct work_struct carddet_work; > - struct tasklet_struct finish_tasklet; > + struct work_struct finish_bh_work; > > struct timer_list timer; > spinlock_t lock; > @@ -643,7 +644,7 @@ static void via_sdc_finish_data(struct via_crdr_mmc_host *host) > if (data->stop) > via_sdc_send_command(host, data->stop); > else > - tasklet_schedule(&host->finish_tasklet); > + queue_work(system_bh_wq, &host->finish_bh_work); > } > > static void via_sdc_finish_command(struct via_crdr_mmc_host *host) > @@ -653,7 +654,7 @@ static void via_sdc_finish_command(struct via_crdr_mmc_host *host) > host->cmd->error = 0; > > if (!host->cmd->data) > - tasklet_schedule(&host->finish_tasklet); > + queue_work(system_bh_wq, &host->finish_bh_work); > > host->cmd = NULL; > } > @@ -682,7 +683,7 @@ static void via_sdc_request(struct mmc_host *mmc, struct mmc_request *mrq) > status = readw(host->sdhc_mmiobase + VIA_CRDR_SDSTATUS); > if (!(status & VIA_CRDR_SDSTS_SLOTG) || host->reject) { > host->mrq->cmd->error = -ENOMEDIUM; > - tasklet_schedule(&host->finish_tasklet); > + queue_work(system_bh_wq, &host->finish_bh_work); > } else { > via_sdc_send_command(host, mrq->cmd); > } > @@ -848,7 +849,7 @@ static void via_sdc_cmd_isr(struct via_crdr_mmc_host *host, u16 intmask) > host->cmd->error = -EILSEQ; > > if (host->cmd->error) > - tasklet_schedule(&host->finish_tasklet); > + queue_work(system_bh_wq, &host->finish_bh_work); > else if (intmask & VIA_CRDR_SDSTS_CRD) > via_sdc_finish_command(host); > } > @@ -955,16 +956,16 @@ static void via_sdc_timeout(struct timer_list *t) > sdhost->cmd->error = -ETIMEDOUT; > else > sdhost->mrq->cmd->error = -ETIMEDOUT; > - tasklet_schedule(&sdhost->finish_tasklet); > + queue_work(system_bh_wq, &sdhost->finish_bh_work); > } > } > > spin_unlock_irqrestore(&sdhost->lock, flags); > } > > -static void via_sdc_tasklet_finish(struct tasklet_struct *t) > +static void via_sdc_finish_bh_work(struct work_struct *t) > { > - struct via_crdr_mmc_host *host = from_tasklet(host, t, finish_tasklet); > + struct via_crdr_mmc_host *host = from_work(host, t, finish_bh_work); > unsigned long flags; > struct mmc_request *mrq; > > @@ -1005,7 +1006,7 @@ static void via_sdc_card_detect(struct work_struct *work) > pr_err("%s: Card removed during transfer!\n", > mmc_hostname(host->mmc)); > host->mrq->cmd->error = -ENOMEDIUM; > - tasklet_schedule(&host->finish_tasklet); > + queue_work(system_bh_wq, &host->finish_bh_work); > } > > spin_unlock_irqrestore(&host->lock, flags); > @@ -1051,7 +1052,7 @@ static void via_init_mmc_host(struct via_crdr_mmc_host *host) > > INIT_WORK(&host->carddet_work, via_sdc_card_detect); > > - tasklet_setup(&host->finish_tasklet, via_sdc_tasklet_finish); > + INIT_WORK(&host->finish_bh_work, via_sdc_finish_bh_work); > > addrbase = host->sdhc_mmiobase; > writel(0x0, addrbase + VIA_CRDR_SDINTMASK); > @@ -1193,7 +1194,7 @@ static void via_sd_remove(struct pci_dev *pcidev) > sdhost->mrq->cmd->error = -ENOMEDIUM; > if (sdhost->mrq->stop) > sdhost->mrq->stop->error = -ENOMEDIUM; > - tasklet_schedule(&sdhost->finish_tasklet); > + queue_work(system_bh_wq, &sdhost->finish_bh_work); > } > spin_unlock_irqrestore(&sdhost->lock, flags); > > @@ -1203,7 +1204,7 @@ static void via_sd_remove(struct pci_dev *pcidev) > > del_timer_sync(&sdhost->timer); > > - tasklet_kill(&sdhost->finish_tasklet); > + cancel_work_sync(&sdhost->finish_bh_work); > > /* switch off power */ > gatt = readb(sdhost->pcictrl_mmiobase + VIA_CRDR_PCICLKGATT); > diff --git a/drivers/mmc/host/wbsd.c b/drivers/mmc/host/wbsd.c > index f0562f712d98..6e20405d0430 100644 > --- a/drivers/mmc/host/wbsd.c > +++ b/drivers/mmc/host/wbsd.c > @@ -459,7 +459,7 @@ static void wbsd_empty_fifo(struct wbsd_host *host) > * FIFO threshold interrupts properly. > */ > if ((data->blocks * data->blksz - data->bytes_xfered) < 16) > - tasklet_schedule(&host->fifo_tasklet); > + queue_work(system_bh_wq, &host->fifo_bh_work); > } > > static void wbsd_fill_fifo(struct wbsd_host *host) > @@ -524,7 +524,7 @@ static void wbsd_fill_fifo(struct wbsd_host *host) > * 'FIFO empty' under certain conditions. So we > * need to be a bit more pro-active. > */ > - tasklet_schedule(&host->fifo_tasklet); > + queue_work(system_bh_wq, &host->fifo_bh_work); > } > > static void wbsd_prepare_data(struct wbsd_host *host, struct mmc_data *data) > @@ -746,7 +746,7 @@ static void wbsd_request(struct mmc_host *mmc, struct mmc_request *mrq) > struct mmc_command *cmd; > > /* > - * Disable tasklets to avoid a deadlock. > + * Disable bh works to avoid a deadlock. > */ > spin_lock_bh(&host->lock); > > @@ -821,7 +821,7 @@ static void wbsd_request(struct mmc_host *mmc, struct mmc_request *mrq) > * Dirty fix for hardware bug. > */ > if (host->dma == -1) > - tasklet_schedule(&host->fifo_tasklet); > + queue_work(system_bh_wq, &host->fifo_bh_work); > > spin_unlock_bh(&host->lock); > > @@ -961,13 +961,13 @@ static void wbsd_reset_ignore(struct timer_list *t) > * Card status might have changed during the > * blackout. > */ > - tasklet_schedule(&host->card_tasklet); > + queue_work(system_bh_wq, &host->card_bh_work); > > spin_unlock_bh(&host->lock); > } > > /* > - * Tasklets > + * BH Works > */ > > static inline struct mmc_data *wbsd_get_data(struct wbsd_host *host) > @@ -987,9 +987,9 @@ static inline struct mmc_data *wbsd_get_data(struct wbsd_host *host) > return host->mrq->cmd->data; > } > > -static void wbsd_tasklet_card(struct tasklet_struct *t) > +static void wbsd_card_bh_work(struct work_struct *t) > { > - struct wbsd_host *host = from_tasklet(host, t, card_tasklet); > + struct wbsd_host *host = from_work(host, t, card_bh_work); > u8 csr; > int delay = -1; > > @@ -1020,7 +1020,7 @@ static void wbsd_tasklet_card(struct tasklet_struct *t) > wbsd_reset(host); > > host->mrq->cmd->error = -ENOMEDIUM; > - tasklet_schedule(&host->finish_tasklet); > + queue_work(system_bh_wq, &host->finish_bh_work); > } > > delay = 0; > @@ -1036,9 +1036,9 @@ static void wbsd_tasklet_card(struct tasklet_struct *t) > mmc_detect_change(host->mmc, msecs_to_jiffies(delay)); > } > > -static void wbsd_tasklet_fifo(struct tasklet_struct *t) > +static void wbsd_fifo_bh_work(struct work_struct *t) > { > - struct wbsd_host *host = from_tasklet(host, t, fifo_tasklet); > + struct wbsd_host *host = from_work(host, t, fifo_bh_work); > struct mmc_data *data; > > spin_lock(&host->lock); > @@ -1060,16 +1060,16 @@ static void wbsd_tasklet_fifo(struct tasklet_struct *t) > */ > if (host->num_sg == 0) { > wbsd_write_index(host, WBSD_IDX_FIFOEN, 0); > - tasklet_schedule(&host->finish_tasklet); > + queue_work(system_bh_wq, &host->finish_bh_work); > } > > end: > spin_unlock(&host->lock); > } > > -static void wbsd_tasklet_crc(struct tasklet_struct *t) > +static void wbsd_crc_bh_work(struct work_struct *t) > { > - struct wbsd_host *host = from_tasklet(host, t, crc_tasklet); > + struct wbsd_host *host = from_work(host, t, crc_bh_work); > struct mmc_data *data; > > spin_lock(&host->lock); > @@ -1085,15 +1085,15 @@ static void wbsd_tasklet_crc(struct tasklet_struct *t) > > data->error = -EILSEQ; > > - tasklet_schedule(&host->finish_tasklet); > + queue_work(system_bh_wq, &host->finish_bh_work); > > end: > spin_unlock(&host->lock); > } > > -static void wbsd_tasklet_timeout(struct tasklet_struct *t) > +static void wbsd_timeout_bh_work(struct work_struct *t) > { > - struct wbsd_host *host = from_tasklet(host, t, timeout_tasklet); > + struct wbsd_host *host = from_work(host, t, timeout_bh_work); > struct mmc_data *data; > > spin_lock(&host->lock); > @@ -1109,15 +1109,15 @@ static void wbsd_tasklet_timeout(struct tasklet_struct *t) > > data->error = -ETIMEDOUT; > > - tasklet_schedule(&host->finish_tasklet); > + queue_work(system_bh_wq, &host->finish_bh_work); > > end: > spin_unlock(&host->lock); > } > > -static void wbsd_tasklet_finish(struct tasklet_struct *t) > +static void wbsd_finish_bh_work(struct work_struct *t) > { > - struct wbsd_host *host = from_tasklet(host, t, finish_tasklet); > + struct wbsd_host *host = from_work(host, t, finish_bh_work); > struct mmc_data *data; > > spin_lock(&host->lock); > @@ -1156,18 +1156,18 @@ static irqreturn_t wbsd_irq(int irq, void *dev_id) > host->isr |= isr; > > /* > - * Schedule tasklets as needed. > + * Schedule bh work as needed. > */ > if (isr & WBSD_INT_CARD) > - tasklet_schedule(&host->card_tasklet); > + queue_work(system_bh_wq, &host->card_bh_work); > if (isr & WBSD_INT_FIFO_THRE) > - tasklet_schedule(&host->fifo_tasklet); > + queue_work(system_bh_wq, &host->fifo_bh_work); > if (isr & WBSD_INT_CRC) > - tasklet_hi_schedule(&host->crc_tasklet); > + queue_work(system_bh_highpri_wq, &host->crc_bh_work); > if (isr & WBSD_INT_TIMEOUT) > - tasklet_hi_schedule(&host->timeout_tasklet); > + queue_work(system_bh_highpri_wq, &host->timeout_bh_work); > if (isr & WBSD_INT_TC) > - tasklet_schedule(&host->finish_tasklet); > + queue_work(system_bh_wq, &host->finish_bh_work); > > return IRQ_HANDLED; > } > @@ -1443,13 +1443,13 @@ static int wbsd_request_irq(struct wbsd_host *host, int irq) > int ret; > > /* > - * Set up tasklets. Must be done before requesting interrupt. > + * Set up bh works. Must be done before requesting interrupt. > */ > - tasklet_setup(&host->card_tasklet, wbsd_tasklet_card); > - tasklet_setup(&host->fifo_tasklet, wbsd_tasklet_fifo); > - tasklet_setup(&host->crc_tasklet, wbsd_tasklet_crc); > - tasklet_setup(&host->timeout_tasklet, wbsd_tasklet_timeout); > - tasklet_setup(&host->finish_tasklet, wbsd_tasklet_finish); > + INIT_WORK(&host->card_bh_work, wbsd_card_bh_work); > + INIT_WORK(&host->fifo_bh_work, wbsd_fifo_bh_work); > + INIT_WORK(&host->crc_bh_work, wbsd_crc_bh_work); > + INIT_WORK(&host->timeout_bh_work, wbsd_timeout_bh_work); > + INIT_WORK(&host->finish_bh_work, wbsd_finish_bh_work); > > /* > * Allocate interrupt. > @@ -1472,11 +1472,11 @@ static void wbsd_release_irq(struct wbsd_host *host) > > host->irq = 0; > > - tasklet_kill(&host->card_tasklet); > - tasklet_kill(&host->fifo_tasklet); > - tasklet_kill(&host->crc_tasklet); > - tasklet_kill(&host->timeout_tasklet); > - tasklet_kill(&host->finish_tasklet); > + cancel_work_sync(&host->card_bh_work); > + cancel_work_sync(&host->fifo_bh_work); > + cancel_work_sync(&host->crc_bh_work); > + cancel_work_sync(&host->timeout_bh_work); > + cancel_work_sync(&host->finish_bh_work); > } > > /* > diff --git a/drivers/mmc/host/wbsd.h b/drivers/mmc/host/wbsd.h > index be30b4d8ce4c..970886831305 100644 > --- a/drivers/mmc/host/wbsd.h > +++ b/drivers/mmc/host/wbsd.h > @@ -171,11 +171,11 @@ struct wbsd_host > int irq; /* Interrupt */ > int dma; /* DMA channel */ > > - struct tasklet_struct card_tasklet; /* Tasklet structures */ > - struct tasklet_struct fifo_tasklet; > - struct tasklet_struct crc_tasklet; > - struct tasklet_struct timeout_tasklet; > - struct tasklet_struct finish_tasklet; > + struct work_struct card_bh_work; /* Work structures */ > + struct work_struct fifo_bh_work; > + struct work_struct crc_bh_work; > + struct work_struct timeout_bh_work; > + struct work_struct finish_bh_work; > > struct timer_list ignore_timer; /* Ignore detection timer */ > }; > -- > 2.34.1 >
Hi, On Tue, Jun 18, 2024 at 03:52:07PM GMT, Allen Pais wrote: > The only generic interface to execute asynchronously in the BH context is > tasklet; however, it's marked deprecated and has some design flaws. To > replace tasklets, BH workqueue support was recently added. A BH workqueue > behaves similarly to regular workqueues except that the queued work items > are executed in the BH context. > > This patch converts drivers/mmc/* from tasklet to BH workqueue. > > Based on the work done by Tejun Heo <tj@kernel.org> Has this been fully build-tested? === drivers/mmc/host/renesas_sdhi_internal_dmac.c: In function ‘renesas_sdhi_internal_dmac_complete_work_fn’: ./include/linux/container_of.h:20:54: error: ‘struct tmio_mmc_host’ has no member named ‘dma_complete’ === In deed, 'dma_complete' is only in 'struct renesas_sdhi_dma'. From there, we can get to the parent 'struct renesas_sdhi' using container_of. But then, I don't see a way to go to 'struct tmio_mmc_host' from there. The other way around is possible because there is the pointer 'struct tmio_mmc_data *pdata' in the TMIO struct pointing to the data contained in 'struct renesas_sdhi'. 'host_to_priv()' does the math. But I don't see a path the other way around. So, it doesn't look like the workqueue interface can provide a generic pointer like tasklets could do? This means we have to add a pointer from 'struct renesas_sdhi' to 'struct tmio_mmc_host'? All the best, Wolfram
On 6/21/24 10:53, Wolfram Sang wrote: > Hi, > > On Tue, Jun 18, 2024 at 03:52:07PM GMT, Allen Pais wrote: >> The only generic interface to execute asynchronously in the BH context is >> tasklet; however, it's marked deprecated and has some design flaws. To >> replace tasklets, BH workqueue support was recently added. A BH workqueue >> behaves similarly to regular workqueues except that the queued work items >> are executed in the BH context. >> >> This patch converts drivers/mmc/* from tasklet to BH workqueue. >> >> Based on the work done by Tejun Heo <tj@kernel.org> > > Has this been fully build-tested? Obviously not, FWIW I noted this on v1: https://lore.kernel.org/linux-mmc/9c31b697-3d80-407a-82b3-cfbb19fafb31@arm.com/ But hadn't looked at the patch since then, sorry. > > === > drivers/mmc/host/renesas_sdhi_internal_dmac.c: In function ‘renesas_sdhi_internal_dmac_complete_work_fn’: > ./include/linux/container_of.h:20:54: error: ‘struct tmio_mmc_host’ has no member named ‘dma_complete’ > === > > In deed, 'dma_complete' is only in 'struct renesas_sdhi_dma'. From > there, we can get to the parent 'struct renesas_sdhi' using > container_of. But then, I don't see a way to go to 'struct > tmio_mmc_host' from there. The other way around is possible because > there is the pointer 'struct tmio_mmc_data *pdata' in the TMIO struct > pointing to the data contained in 'struct renesas_sdhi'. 'host_to_priv()' > does the math. But I don't see a path the other way around. > > So, it doesn't look like the workqueue interface can provide a > generic pointer like tasklets could do? This means we have to add a > pointer from 'struct renesas_sdhi' to 'struct tmio_mmc_host'? > > All the best, > > Wolfram >
> Obviously not, FWIW I noted this on v1: > https://lore.kernel.org/linux-mmc/9c31b697-3d80-407a-82b3-cfbb19fafb31@arm.com/ > But hadn't looked at the patch since then, sorry. No worries, but you should really remove unneeded context from mails you quote. In this web-interface, I couldn't find this mentioning of the build error.
> On Tue, Jun 18, 2024 at 03:52:07PM GMT, Allen Pais wrote: > > The only generic interface to execute asynchronously in the BH context is > > tasklet; however, it's marked deprecated and has some design flaws. To > > replace tasklets, BH workqueue support was recently added. A BH workqueue > > behaves similarly to regular workqueues except that the queued work items > > are executed in the BH context. > > > > This patch converts drivers/mmc/* from tasklet to BH workqueue. > > > > Based on the work done by Tejun Heo <tj@kernel.org> > > Has this been fully build-tested? > > === > drivers/mmc/host/renesas_sdhi_internal_dmac.c: In function ‘renesas_sdhi_internal_dmac_complete_work_fn’: > ./include/linux/container_of.h:20:54: error: ‘struct tmio_mmc_host’ has no member named ‘dma_complete’ > === Yes, it does break. My bad, my local compile testing failed to catch this. > > In deed, 'dma_complete' is only in 'struct renesas_sdhi_dma'. From > there, we can get to the parent 'struct renesas_sdhi' using > container_of. But then, I don't see a way to go to 'struct > tmio_mmc_host' from there. The other way around is possible because > there is the pointer 'struct tmio_mmc_data *pdata' in the TMIO struct > pointing to the data contained in 'struct renesas_sdhi'. 'host_to_priv()' > does the math. But I don't see a path the other way around. > I have been looking at this code since the issue was reported. Yes it is a bit tricky and so far, the only way I found was to introduce a new pointer. But, I am not very familiar with the code and have asked Ulf for pointers. If introducing the pointer is the only way forward and is an acceptable solution, I can send out a draft. Thanks, Allen > So, it doesn't look like the workqueue interface can provide a > generic pointer like tasklets could do? This means we have to add a > pointer from 'struct renesas_sdhi' to 'struct tmio_mmc_host'? > > All the best, > > Wolfram >
> > > The only generic interface to execute asynchronously in the BH context is > > > tasklet; however, it's marked deprecated and has some design flaws. To > > > replace tasklets, BH workqueue support was recently added. A BH workqueue > > > behaves similarly to regular workqueues except that the queued work items > > > are executed in the BH context. > > > > > > This patch converts drivers/mmc/* from tasklet to BH workqueue. > > > > > > Based on the work done by Tejun Heo <tj@kernel.org> > > > > Has this been fully build-tested? > > > > === > > drivers/mmc/host/renesas_sdhi_internal_dmac.c: In function ‘renesas_sdhi_internal_dmac_complete_work_fn’: > > ./include/linux/container_of.h:20:54: error: ‘struct tmio_mmc_host’ has no member named ‘dma_complete’ > > === > > Yes, it does break. My bad, my local compile testing failed to catch this. > > > > > In deed, 'dma_complete' is only in 'struct renesas_sdhi_dma'. From > > there, we can get to the parent 'struct renesas_sdhi' using > > container_of. But then, I don't see a way to go to 'struct > > tmio_mmc_host' from there. The other way around is possible because > > there is the pointer 'struct tmio_mmc_data *pdata' in the TMIO struct > > pointing to the data contained in 'struct renesas_sdhi'. 'host_to_priv()' > > does the math. But I don't see a path the other way around. > > > > I have been looking at this code since the issue was reported. Yes it > is a bit tricky and so far, the only way I found was to introduce a new pointer. > But, I am not very familiar with the code and have asked Ulf for pointers. > > If introducing the pointer is the only way forward and is an > acceptable solution, > I can send out a draft. > > Thanks, > Allen > > > So, it doesn't look like the workqueue interface can provide a > > generic pointer like tasklets could do? This means we have to add a > > pointer from 'struct renesas_sdhi' to 'struct tmio_mmc_host'? > > How about the following? diff --git a/drivers/mmc/host/renesas_sdhi_internal_dmac.c b/drivers/mmc/host/renesas_sdhi_internal_dmac.c index 5fd276492f80..9a63b78837e2 100644 --- a/drivers/mmc/host/renesas_sdhi_internal_dmac.c +++ b/drivers/mmc/host/renesas_sdhi_internal_dmac.c @@ -484,9 +484,14 @@ static bool renesas_sdhi_internal_dmac_complete(struct tmio_mmc_host *host) return true; } -static void renesas_sdhi_internal_dmac_complete_work_fn(struct work_struct *t) +static void renesas_sdhi_internal_dmac_complete_work_fn(struct work_struct *work) { - struct tmio_mmc_host *host = from_work(host, t, dma_complete); + struct renesas_sdhi_dma *dma_priv = container_of(work, + struct renesas_sdhi_dma, + dma_complete); + struct renesas_sdhi *sdhi = container_of(dma_priv, + struct renesas_sdhi, dma_priv); + struct tmio_mmc_host *host = sdhi->mmc_data->host; spin_lock_irq(&host->lock); if (!renesas_sdhi_internal_dmac_complete(host)) diff --git a/include/linux/mfd/tmio.h b/include/linux/mfd/tmio.h index eace8ea6cda0..cf2cca0e96b5 100644 --- a/include/linux/mfd/tmio.h +++ b/include/linux/mfd/tmio.h @@ -100,6 +100,7 @@ struct tmio_mmc_data { dma_addr_t dma_rx_offset; unsigned int max_blk_count; unsigned short max_segs; + struct tmio_mmc_host *host; /* back pointer to the parent struct */ void (*set_pwr)(struct platform_device *host, int state); void (*set_clk_div)(struct platform_device *host, int state); }; Thanks.
> If introducing the pointer is the only way forward and is an > acceptable solution, > I can send out a draft. My proposal is that I take over the SDHI part of your series. I know the code pretty well and I can test the solution right away. Your draft seems in the wrong layer (conceptually, technically it should work), but I need to play around a little. Is that okay with you?
> > > If introducing the pointer is the only way forward and is an > > acceptable solution, > > I can send out a draft. > > My proposal is that I take over the SDHI part of your series. I know the > code pretty well and I can test the solution right away. Your draft > seems in the wrong layer (conceptually, technically it should work), but > I need to play around a little. Is that okay with you? > Sure, happy to help if needed. Thanks.
diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c index 8199d9620075..6490df54a6f5 100644 --- a/drivers/mmc/host/atmel-mci.c +++ b/drivers/mmc/host/atmel-mci.c @@ -33,6 +33,7 @@ #include <linux/pm.h> #include <linux/pm_runtime.h> #include <linux/pinctrl/consumer.h> +#include <linux/workqueue.h> #include <asm/cacheflush.h> #include <asm/io.h> @@ -272,12 +273,12 @@ struct atmel_mci_dma { * EVENT_DATA_ERROR is pending. * @stop_cmdr: Value to be loaded into CMDR when the stop command is * to be sent. - * @tasklet: Tasklet running the request state machine. + * @bh_work: Work running the request state machine. * @pending_events: Bitmask of events flagged by the interrupt handler - * to be processed by the tasklet. + * to be processed by the work. * @completed_events: Bitmask of events which the state machine has * processed. - * @state: Tasklet state. + * @state: Work state. * @queue: List of slots waiting for access to the controller. * @need_clock_update: Update the clock rate before the next request. * @need_reset: Reset controller before next request. @@ -352,7 +353,7 @@ struct atmel_mci { u32 data_status; u32 stop_cmdr; - struct tasklet_struct tasklet; + struct work_struct bh_work; unsigned long pending_events; unsigned long completed_events; enum atmel_mci_state state; @@ -735,7 +736,7 @@ static void atmci_timeout_timer(struct timer_list *t) host->need_reset = 1; host->state = STATE_END_REQUEST; smp_wmb(); - tasklet_schedule(&host->tasklet); + queue_work(system_bh_wq, &host->bh_work); } static inline unsigned int atmci_ns_to_clocks(struct atmel_mci *host, @@ -958,7 +959,7 @@ static void atmci_pdc_complete(struct atmel_mci *host) dev_dbg(dev, "(%s) set pending xfer complete\n", __func__); atmci_set_pending(host, EVENT_XFER_COMPLETE); - tasklet_schedule(&host->tasklet); + queue_work(system_bh_wq, &host->bh_work); } static void atmci_dma_cleanup(struct atmel_mci *host) @@ -972,7 +973,7 @@ static void atmci_dma_cleanup(struct atmel_mci *host) } /* - * This function is called by the DMA driver from tasklet context. + * This function is called by the DMA driver from bh context. */ static void atmci_dma_complete(void *arg) { @@ -995,7 +996,7 @@ static void atmci_dma_complete(void *arg) if (data) { dev_dbg(dev, "(%s) set pending xfer complete\n", __func__); atmci_set_pending(host, EVENT_XFER_COMPLETE); - tasklet_schedule(&host->tasklet); + queue_work(system_bh_wq, &host->bh_work); /* * Regardless of what the documentation says, we have @@ -1008,7 +1009,7 @@ static void atmci_dma_complete(void *arg) * haven't seen all the potential error bits yet. * * The interrupt handler will schedule a different - * tasklet to finish things up when the data transfer + * bh work to finish things up when the data transfer * is completely done. * * We may not complete the mmc request here anyway @@ -1745,9 +1746,9 @@ static void atmci_detect_change(struct timer_list *t) } } -static void atmci_tasklet_func(struct tasklet_struct *t) +static void atmci_work_func(struct work_struct *t) { - struct atmel_mci *host = from_tasklet(host, t, tasklet); + struct atmel_mci *host = from_work(host, t, bh_work); struct mmc_request *mrq = host->mrq; struct mmc_data *data = host->data; struct device *dev = host->dev; @@ -1759,7 +1760,7 @@ static void atmci_tasklet_func(struct tasklet_struct *t) state = host->state; - dev_vdbg(dev, "tasklet: state %u pending/completed/mask %lx/%lx/%x\n", + dev_vdbg(dev, "bh_work: state %u pending/completed/mask %lx/%lx/%x\n", state, host->pending_events, host->completed_events, atmci_readl(host, ATMCI_IMR)); @@ -2118,7 +2119,7 @@ static irqreturn_t atmci_interrupt(int irq, void *dev_id) dev_dbg(dev, "set pending data error\n"); smp_wmb(); atmci_set_pending(host, EVENT_DATA_ERROR); - tasklet_schedule(&host->tasklet); + queue_work(system_bh_wq, &host->bh_work); } if (pending & ATMCI_TXBUFE) { @@ -2187,7 +2188,7 @@ static irqreturn_t atmci_interrupt(int irq, void *dev_id) smp_wmb(); dev_dbg(dev, "set pending notbusy\n"); atmci_set_pending(host, EVENT_NOTBUSY); - tasklet_schedule(&host->tasklet); + queue_work(system_bh_wq, &host->bh_work); } if (pending & ATMCI_NOTBUSY) { @@ -2196,7 +2197,7 @@ static irqreturn_t atmci_interrupt(int irq, void *dev_id) smp_wmb(); dev_dbg(dev, "set pending notbusy\n"); atmci_set_pending(host, EVENT_NOTBUSY); - tasklet_schedule(&host->tasklet); + queue_work(system_bh_wq, &host->bh_work); } if (pending & ATMCI_RXRDY) @@ -2211,7 +2212,7 @@ static irqreturn_t atmci_interrupt(int irq, void *dev_id) smp_wmb(); dev_dbg(dev, "set pending cmd rdy\n"); atmci_set_pending(host, EVENT_CMD_RDY); - tasklet_schedule(&host->tasklet); + queue_work(system_bh_wq, &host->bh_work); } if (pending & (ATMCI_SDIOIRQA | ATMCI_SDIOIRQB)) @@ -2487,7 +2488,7 @@ static int atmci_probe(struct platform_device *pdev) host->mapbase = regs->start; - tasklet_setup(&host->tasklet, atmci_tasklet_func); + INIT_WORK(&host->bh_work, atmci_work_func); ret = request_irq(irq, atmci_interrupt, 0, dev_name(dev), host); if (ret) { diff --git a/drivers/mmc/host/au1xmmc.c b/drivers/mmc/host/au1xmmc.c index b5a5c6a2fe8b..6e80bcb668ec 100644 --- a/drivers/mmc/host/au1xmmc.c +++ b/drivers/mmc/host/au1xmmc.c @@ -42,6 +42,7 @@ #include <linux/leds.h> #include <linux/mmc/host.h> #include <linux/slab.h> +#include <linux/workqueue.h> #include <asm/io.h> #include <asm/mach-au1x00/au1000.h> @@ -113,8 +114,8 @@ struct au1xmmc_host { int irq; - struct tasklet_struct finish_task; - struct tasklet_struct data_task; + struct work_struct finish_bh_work; + struct work_struct data_bh_work; struct au1xmmc_platform_data *platdata; struct platform_device *pdev; struct resource *ioarea; @@ -253,9 +254,9 @@ static void au1xmmc_finish_request(struct au1xmmc_host *host) mmc_request_done(host->mmc, mrq); } -static void au1xmmc_tasklet_finish(struct tasklet_struct *t) +static void au1xmmc_finish_bh_work(struct work_struct *t) { - struct au1xmmc_host *host = from_tasklet(host, t, finish_task); + struct au1xmmc_host *host = from_work(host, t, finish_bh_work); au1xmmc_finish_request(host); } @@ -363,9 +364,9 @@ static void au1xmmc_data_complete(struct au1xmmc_host *host, u32 status) au1xmmc_finish_request(host); } -static void au1xmmc_tasklet_data(struct tasklet_struct *t) +static void au1xmmc_data_bh_work(struct work_struct *t) { - struct au1xmmc_host *host = from_tasklet(host, t, data_task); + struct au1xmmc_host *host = from_work(host, t, data_bh_work); u32 status = __raw_readl(HOST_STATUS(host)); au1xmmc_data_complete(host, status); @@ -425,7 +426,7 @@ static void au1xmmc_send_pio(struct au1xmmc_host *host) if (host->flags & HOST_F_STOP) SEND_STOP(host); - tasklet_schedule(&host->data_task); + queue_work(system_bh_wq, &host->data_bh_work); } } @@ -505,7 +506,7 @@ static void au1xmmc_receive_pio(struct au1xmmc_host *host) if (host->flags & HOST_F_STOP) SEND_STOP(host); - tasklet_schedule(&host->data_task); + queue_work(system_bh_wq, &host->data_bh_work); } } @@ -561,7 +562,7 @@ static void au1xmmc_cmd_complete(struct au1xmmc_host *host, u32 status) if (!trans || cmd->error) { IRQ_OFF(host, SD_CONFIG_TH | SD_CONFIG_RA | SD_CONFIG_RF); - tasklet_schedule(&host->finish_task); + queue_work(system_bh_wq, &host->finish_bh_work); return; } @@ -797,7 +798,7 @@ static irqreturn_t au1xmmc_irq(int irq, void *dev_id) IRQ_OFF(host, SD_CONFIG_NE | SD_CONFIG_TH); /* IRQ_OFF(host, SD_CONFIG_TH | SD_CONFIG_RA | SD_CONFIG_RF); */ - tasklet_schedule(&host->finish_task); + queue_work(system_bh_wq, &host->finish_bh_work); } #if 0 else if (status & SD_STATUS_DD) { @@ -806,7 +807,7 @@ static irqreturn_t au1xmmc_irq(int irq, void *dev_id) au1xmmc_receive_pio(host); else { au1xmmc_data_complete(host, status); - /* tasklet_schedule(&host->data_task); */ + /* queue_work(system_bh_wq, &host->data_bh_work); */ } } #endif @@ -854,7 +855,7 @@ static void au1xmmc_dbdma_callback(int irq, void *dev_id) if (host->flags & HOST_F_STOP) SEND_STOP(host); - tasklet_schedule(&host->data_task); + queue_work(system_bh_wq, &host->data_bh_work); } static int au1xmmc_dbdma_init(struct au1xmmc_host *host) @@ -1039,9 +1040,9 @@ static int au1xmmc_probe(struct platform_device *pdev) if (host->platdata) mmc->caps &= ~(host->platdata->mask_host_caps); - tasklet_setup(&host->data_task, au1xmmc_tasklet_data); + INIT_WORK(&host->data_bh_work, au1xmmc_data_bh_work); - tasklet_setup(&host->finish_task, au1xmmc_tasklet_finish); + INIT_WORK(&host->finish_bh_work, au1xmmc_finish_bh_work); if (has_dbdma()) { ret = au1xmmc_dbdma_init(host); @@ -1091,8 +1092,8 @@ static int au1xmmc_probe(struct platform_device *pdev) if (host->flags & HOST_F_DBDMA) au1xmmc_dbdma_shutdown(host); - tasklet_kill(&host->data_task); - tasklet_kill(&host->finish_task); + cancel_work_sync(&host->data_bh_work); + cancel_work_sync(&host->finish_bh_work); if (host->platdata && host->platdata->cd_setup && !(mmc->caps & MMC_CAP_NEEDS_POLL)) @@ -1135,8 +1136,8 @@ static void au1xmmc_remove(struct platform_device *pdev) __raw_writel(0, HOST_CONFIG2(host)); wmb(); /* drain writebuffer */ - tasklet_kill(&host->data_task); - tasklet_kill(&host->finish_task); + cancel_work_sync(&host->data_bh_work); + cancel_work_sync(&host->finish_bh_work); if (host->flags & HOST_F_DBDMA) au1xmmc_dbdma_shutdown(host); diff --git a/drivers/mmc/host/cb710-mmc.c b/drivers/mmc/host/cb710-mmc.c index 0aec33b88bef..902f7f20abaa 100644 --- a/drivers/mmc/host/cb710-mmc.c +++ b/drivers/mmc/host/cb710-mmc.c @@ -493,7 +493,7 @@ static void cb710_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq) if (!cb710_mmc_command(mmc, mrq->cmd) && mrq->stop) cb710_mmc_command(mmc, mrq->stop); - tasklet_schedule(&reader->finish_req_tasklet); + queue_work(system_bh_wq, &reader->finish_req_bh_work); } static int cb710_mmc_powerup(struct cb710_slot *slot) @@ -646,10 +646,10 @@ static int cb710_mmc_irq_handler(struct cb710_slot *slot) return 1; } -static void cb710_mmc_finish_request_tasklet(struct tasklet_struct *t) +static void cb710_mmc_finish_request_bh_work(struct work_struct *t) { - struct cb710_mmc_reader *reader = from_tasklet(reader, t, - finish_req_tasklet); + struct cb710_mmc_reader *reader = from_work(reader, t, + finish_req_bh_work); struct mmc_request *mrq = reader->mrq; reader->mrq = NULL; @@ -718,8 +718,8 @@ static int cb710_mmc_init(struct platform_device *pdev) reader = mmc_priv(mmc); - tasklet_setup(&reader->finish_req_tasklet, - cb710_mmc_finish_request_tasklet); + INIT_WORK(&reader->finish_req_bh_work, + cb710_mmc_finish_request_bh_work); spin_lock_init(&reader->irq_lock); cb710_dump_regs(chip, CB710_DUMP_REGS_MMC); @@ -763,7 +763,7 @@ static void cb710_mmc_exit(struct platform_device *pdev) cb710_write_port_32(slot, CB710_MMC_CONFIG_PORT, 0); cb710_write_port_16(slot, CB710_MMC_CONFIGB_PORT, 0); - tasklet_kill(&reader->finish_req_tasklet); + cancel_work_sync(&reader->finish_req_bh_work); mmc_free_host(mmc); } diff --git a/drivers/mmc/host/cb710-mmc.h b/drivers/mmc/host/cb710-mmc.h index 5e053077dbed..59abaccaad10 100644 --- a/drivers/mmc/host/cb710-mmc.h +++ b/drivers/mmc/host/cb710-mmc.h @@ -8,10 +8,11 @@ #define LINUX_CB710_MMC_H #include <linux/cb710.h> +#include <linux/workqueue.h> /* per-MMC-reader structure */ struct cb710_mmc_reader { - struct tasklet_struct finish_req_tasklet; + struct work_struct finish_req_bh_work; struct mmc_request *mrq; spinlock_t irq_lock; unsigned char last_power_mode; diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c index 8e2d676b9239..7195de2cde44 100644 --- a/drivers/mmc/host/dw_mmc.c +++ b/drivers/mmc/host/dw_mmc.c @@ -493,7 +493,7 @@ static void dw_mci_dmac_complete_dma(void *arg) */ if (data) { set_bit(EVENT_XFER_COMPLETE, &host->pending_events); - tasklet_schedule(&host->tasklet); + queue_work(system_bh_wq, &host->bh_work); } } @@ -1834,7 +1834,7 @@ static enum hrtimer_restart dw_mci_fault_timer(struct hrtimer *t) if (!host->data_status) { host->data_status = SDMMC_INT_DCRC; set_bit(EVENT_DATA_ERROR, &host->pending_events); - tasklet_schedule(&host->tasklet); + queue_work(system_bh_wq, &host->bh_work); } spin_unlock_irqrestore(&host->irq_lock, flags); @@ -2056,9 +2056,9 @@ static bool dw_mci_clear_pending_data_complete(struct dw_mci *host) return true; } -static void dw_mci_tasklet_func(struct tasklet_struct *t) +static void dw_mci_work_func(struct work_struct *t) { - struct dw_mci *host = from_tasklet(host, t, tasklet); + struct dw_mci *host = from_work(host, t, bh_work); struct mmc_data *data; struct mmc_command *cmd; struct mmc_request *mrq; @@ -2113,7 +2113,7 @@ static void dw_mci_tasklet_func(struct tasklet_struct *t) * will waste a bit of time (we already know * the command was bad), it can't cause any * errors since it's possible it would have - * taken place anyway if this tasklet got + * taken place anyway if this bh work got * delayed. Allowing the transfer to take place * avoids races and keeps things simple. */ @@ -2706,7 +2706,7 @@ static void dw_mci_cmd_interrupt(struct dw_mci *host, u32 status) smp_wmb(); /* drain writebuffer */ set_bit(EVENT_CMD_COMPLETE, &host->pending_events); - tasklet_schedule(&host->tasklet); + queue_work(system_bh_wq, &host->bh_work); dw_mci_start_fault_timer(host); } @@ -2774,7 +2774,7 @@ static irqreturn_t dw_mci_interrupt(int irq, void *dev_id) set_bit(EVENT_DATA_COMPLETE, &host->pending_events); - tasklet_schedule(&host->tasklet); + queue_work(system_bh_wq, &host->bh_work); spin_unlock(&host->irq_lock); } @@ -2793,7 +2793,7 @@ static irqreturn_t dw_mci_interrupt(int irq, void *dev_id) dw_mci_read_data_pio(host, true); } set_bit(EVENT_DATA_COMPLETE, &host->pending_events); - tasklet_schedule(&host->tasklet); + queue_work(system_bh_wq, &host->bh_work); spin_unlock(&host->irq_lock); } @@ -3098,7 +3098,7 @@ static void dw_mci_cmd11_timer(struct timer_list *t) host->cmd_status = SDMMC_INT_RTO; set_bit(EVENT_CMD_COMPLETE, &host->pending_events); - tasklet_schedule(&host->tasklet); + queue_work(system_bh_wq, &host->bh_work); } static void dw_mci_cto_timer(struct timer_list *t) @@ -3144,7 +3144,7 @@ static void dw_mci_cto_timer(struct timer_list *t) */ host->cmd_status = SDMMC_INT_RTO; set_bit(EVENT_CMD_COMPLETE, &host->pending_events); - tasklet_schedule(&host->tasklet); + queue_work(system_bh_wq, &host->bh_work); break; default: dev_warn(host->dev, "Unexpected command timeout, state %d\n", @@ -3195,7 +3195,7 @@ static void dw_mci_dto_timer(struct timer_list *t) host->data_status = SDMMC_INT_DRTO; set_bit(EVENT_DATA_ERROR, &host->pending_events); set_bit(EVENT_DATA_COMPLETE, &host->pending_events); - tasklet_schedule(&host->tasklet); + queue_work(system_bh_wq, &host->bh_work); break; default: dev_warn(host->dev, "Unexpected data timeout, state %d\n", @@ -3435,7 +3435,7 @@ int dw_mci_probe(struct dw_mci *host) else host->fifo_reg = host->regs + DATA_240A_OFFSET; - tasklet_setup(&host->tasklet, dw_mci_tasklet_func); + INIT_WORK(&host->bh_work, dw_mci_work_func); ret = devm_request_irq(host->dev, host->irq, dw_mci_interrupt, host->irq_flags, "dw-mci", host); if (ret) diff --git a/drivers/mmc/host/dw_mmc.h b/drivers/mmc/host/dw_mmc.h index 4ed81f94f7ca..b504f7ae513a 100644 --- a/drivers/mmc/host/dw_mmc.h +++ b/drivers/mmc/host/dw_mmc.h @@ -17,6 +17,7 @@ #include <linux/fault-inject.h> #include <linux/hrtimer.h> #include <linux/interrupt.h> +#include <linux/workqueue.h> enum dw_mci_state { STATE_IDLE = 0, @@ -89,12 +90,12 @@ struct dw_mci_dma_slave { * @stop_cmdr: Value to be loaded into CMDR when the stop command is * to be sent. * @dir_status: Direction of current transfer. - * @tasklet: Tasklet running the request state machine. + * @bh_work: Work running the request state machine. * @pending_events: Bitmask of events flagged by the interrupt handler - * to be processed by the tasklet. + * to be processed by bh work. * @completed_events: Bitmask of events which the state machine has * processed. - * @state: Tasklet state. + * @state: BH work state. * @queue: List of slots waiting for access to the controller. * @bus_hz: The rate of @mck in Hz. This forms the basis for MMC bus * rate and timeout calculations. @@ -194,7 +195,7 @@ struct dw_mci { u32 data_status; u32 stop_cmdr; u32 dir_status; - struct tasklet_struct tasklet; + struct work_struct bh_work; unsigned long pending_events; unsigned long completed_events; enum dw_mci_state state; diff --git a/drivers/mmc/host/omap.c b/drivers/mmc/host/omap.c index a8ee0df47148..335350a4e99a 100644 --- a/drivers/mmc/host/omap.c +++ b/drivers/mmc/host/omap.c @@ -28,6 +28,7 @@ #include <linux/slab.h> #include <linux/gpio/consumer.h> #include <linux/platform_data/mmc-omap.h> +#include <linux/workqueue.h> #define OMAP_MMC_REG_CMD 0x00 @@ -105,7 +106,7 @@ struct mmc_omap_slot { u16 power_mode; unsigned int fclk_freq; - struct tasklet_struct cover_tasklet; + struct work_struct cover_bh_work; struct timer_list cover_timer; unsigned cover_open; @@ -873,18 +874,18 @@ void omap_mmc_notify_cover_event(struct device *dev, int num, int is_closed) sysfs_notify(&slot->mmc->class_dev.kobj, NULL, "cover_switch"); } - tasklet_hi_schedule(&slot->cover_tasklet); + queue_work(system_bh_highpri_wq, &slot->cover_bh_work); } static void mmc_omap_cover_timer(struct timer_list *t) { struct mmc_omap_slot *slot = from_timer(slot, t, cover_timer); - tasklet_schedule(&slot->cover_tasklet); + queue_work(system_bh_wq, &slot->cover_bh_work); } -static void mmc_omap_cover_handler(struct tasklet_struct *t) +static void mmc_omap_cover_bh_handler(struct work_struct *t) { - struct mmc_omap_slot *slot = from_tasklet(slot, t, cover_tasklet); + struct mmc_omap_slot *slot = from_work(slot, t, cover_bh_work); int cover_open = mmc_omap_cover_is_open(slot); mmc_detect_change(slot->mmc, 0); @@ -1314,7 +1315,7 @@ static int mmc_omap_new_slot(struct mmc_omap_host *host, int id) if (slot->pdata->get_cover_state != NULL) { timer_setup(&slot->cover_timer, mmc_omap_cover_timer, 0); - tasklet_setup(&slot->cover_tasklet, mmc_omap_cover_handler); + INIT_WORK(&slot->cover_bh_work, mmc_omap_cover_bh_handler); } r = mmc_add_host(mmc); @@ -1333,7 +1334,7 @@ static int mmc_omap_new_slot(struct mmc_omap_host *host, int id) &dev_attr_cover_switch); if (r < 0) goto err_remove_slot_name; - tasklet_schedule(&slot->cover_tasklet); + queue_work(system_bh_wq, &slot->cover_bh_work); } return 0; @@ -1356,7 +1357,7 @@ static void mmc_omap_remove_slot(struct mmc_omap_slot *slot) if (slot->pdata->get_cover_state != NULL) device_remove_file(&mmc->class_dev, &dev_attr_cover_switch); - tasklet_kill(&slot->cover_tasklet); + cancel_work_sync(&slot->cover_bh_work); del_timer_sync(&slot->cover_timer); flush_workqueue(slot->host->mmc_omap_wq); diff --git a/drivers/mmc/host/renesas_sdhi.h b/drivers/mmc/host/renesas_sdhi.h index 586f94d4dbfd..4fd2bfcacd76 100644 --- a/drivers/mmc/host/renesas_sdhi.h +++ b/drivers/mmc/host/renesas_sdhi.h @@ -11,6 +11,7 @@ #include <linux/dmaengine.h> #include <linux/platform_device.h> +#include <linux/workqueue.h> #include "tmio_mmc.h" struct renesas_sdhi_scc { @@ -67,7 +68,7 @@ struct renesas_sdhi_dma { dma_filter_fn filter; void (*enable)(struct tmio_mmc_host *host, bool enable); struct completion dma_dataend; - struct tasklet_struct dma_complete; + struct work_struct dma_complete; }; struct renesas_sdhi { diff --git a/drivers/mmc/host/renesas_sdhi_internal_dmac.c b/drivers/mmc/host/renesas_sdhi_internal_dmac.c index 422fa63a2e99..5fd276492f80 100644 --- a/drivers/mmc/host/renesas_sdhi_internal_dmac.c +++ b/drivers/mmc/host/renesas_sdhi_internal_dmac.c @@ -337,7 +337,7 @@ static bool renesas_sdhi_internal_dmac_dma_irq(struct tmio_mmc_host *host) writel(status ^ dma_irqs, host->ctl + DM_CM_INFO1); set_bit(SDHI_DMA_END_FLAG_DMA, &dma_priv->end_flags); if (test_bit(SDHI_DMA_END_FLAG_ACCESS, &dma_priv->end_flags)) - tasklet_schedule(&dma_priv->dma_complete); + queue_work(system_bh_wq, &dma_priv->dma_complete); } return status & dma_irqs; @@ -352,7 +352,7 @@ renesas_sdhi_internal_dmac_dataend_dma(struct tmio_mmc_host *host) set_bit(SDHI_DMA_END_FLAG_ACCESS, &dma_priv->end_flags); if (test_bit(SDHI_DMA_END_FLAG_DMA, &dma_priv->end_flags) || host->data->error) - tasklet_schedule(&dma_priv->dma_complete); + queue_work(system_bh_wq, &dma_priv->dma_complete); } /* @@ -440,9 +440,9 @@ renesas_sdhi_internal_dmac_start_dma(struct tmio_mmc_host *host, renesas_sdhi_internal_dmac_enable_dma(host, false); } -static void renesas_sdhi_internal_dmac_issue_tasklet_fn(unsigned long arg) +static void renesas_sdhi_internal_dmac_issue_work_fn(struct work_struct *t) { - struct tmio_mmc_host *host = (struct tmio_mmc_host *)arg; + struct tmio_mmc_host *host = from_work(host, t, dma_issue); struct renesas_sdhi *priv = host_to_priv(host); tmio_mmc_enable_mmc_irqs(host, TMIO_STAT_DATAEND); @@ -454,7 +454,7 @@ static void renesas_sdhi_internal_dmac_issue_tasklet_fn(unsigned long arg) /* on CMD errors, simulate DMA end immediately */ set_bit(SDHI_DMA_END_FLAG_DMA, &priv->dma_priv.end_flags); if (test_bit(SDHI_DMA_END_FLAG_ACCESS, &priv->dma_priv.end_flags)) - tasklet_schedule(&priv->dma_priv.dma_complete); + queue_work(system_bh_wq, &priv->dma_priv.dma_complete); } } @@ -484,9 +484,9 @@ static bool renesas_sdhi_internal_dmac_complete(struct tmio_mmc_host *host) return true; } -static void renesas_sdhi_internal_dmac_complete_tasklet_fn(unsigned long arg) +static void renesas_sdhi_internal_dmac_complete_work_fn(struct work_struct *t) { - struct tmio_mmc_host *host = (struct tmio_mmc_host *)arg; + struct tmio_mmc_host *host = from_work(host, t, dma_complete); spin_lock_irq(&host->lock); if (!renesas_sdhi_internal_dmac_complete(host)) @@ -544,12 +544,10 @@ renesas_sdhi_internal_dmac_request_dma(struct tmio_mmc_host *host, /* Each value is set to non-zero to assume "enabling" each DMA */ host->chan_rx = host->chan_tx = (void *)0xdeadbeaf; - tasklet_init(&priv->dma_priv.dma_complete, - renesas_sdhi_internal_dmac_complete_tasklet_fn, - (unsigned long)host); - tasklet_init(&host->dma_issue, - renesas_sdhi_internal_dmac_issue_tasklet_fn, - (unsigned long)host); + INIT_WORK(&priv->dma_priv.dma_complete, + renesas_sdhi_internal_dmac_complete_work_fn); + INIT_WORK(&host->dma_issue, + renesas_sdhi_internal_dmac_issue_work_fn); /* Add pre_req and post_req */ host->ops.pre_req = renesas_sdhi_internal_dmac_pre_req; diff --git a/drivers/mmc/host/renesas_sdhi_sys_dmac.c b/drivers/mmc/host/renesas_sdhi_sys_dmac.c index 9cf7f9feab72..793595ad6d02 100644 --- a/drivers/mmc/host/renesas_sdhi_sys_dmac.c +++ b/drivers/mmc/host/renesas_sdhi_sys_dmac.c @@ -312,9 +312,9 @@ static void renesas_sdhi_sys_dmac_start_dma(struct tmio_mmc_host *host, } } -static void renesas_sdhi_sys_dmac_issue_tasklet_fn(unsigned long priv) +static void renesas_sdhi_sys_dmac_issue_work_fn(struct work_struct *t) { - struct tmio_mmc_host *host = (struct tmio_mmc_host *)priv; + struct tmio_mmc_host *host = from_work(host, t, dma_issue); struct dma_chan *chan = NULL; spin_lock_irq(&host->lock); @@ -401,9 +401,8 @@ static void renesas_sdhi_sys_dmac_request_dma(struct tmio_mmc_host *host, goto ebouncebuf; init_completion(&priv->dma_priv.dma_dataend); - tasklet_init(&host->dma_issue, - renesas_sdhi_sys_dmac_issue_tasklet_fn, - (unsigned long)host); + INIT_WORK(&host->dma_issue, + renesas_sdhi_sys_dmac_issue_work_fn); } renesas_sdhi_sys_dmac_enable_dma(host, true); diff --git a/drivers/mmc/host/sdhci-bcm-kona.c b/drivers/mmc/host/sdhci-bcm-kona.c index cb9152c6a65d..e067c7f5c537 100644 --- a/drivers/mmc/host/sdhci-bcm-kona.c +++ b/drivers/mmc/host/sdhci-bcm-kona.c @@ -107,7 +107,7 @@ static void sdhci_bcm_kona_sd_init(struct sdhci_host *host) * Software emulation of the SD card insertion/removal. Set insert=1 for insert * and insert=0 for removal. The card detection is done by GPIO. For Broadcom * IP to function properly the bit 0 of CORESTAT register needs to be set/reset - * to generate the CD IRQ handled in sdhci.c which schedules card_tasklet. +* to generate the CD IRQ handled in sdhci.c */ static int sdhci_bcm_kona_sd_card_emulate(struct sdhci_host *host, int insert) { diff --git a/drivers/mmc/host/tifm_sd.c b/drivers/mmc/host/tifm_sd.c index b5a2f2f25ad9..aea14bf3e2e8 100644 --- a/drivers/mmc/host/tifm_sd.c +++ b/drivers/mmc/host/tifm_sd.c @@ -13,6 +13,7 @@ #include <linux/highmem.h> #include <linux/scatterlist.h> #include <linux/module.h> +#include <linux/workqueue.h> #include <asm/io.h> #define DRIVER_NAME "tifm_sd" @@ -97,7 +98,7 @@ struct tifm_sd { unsigned int clk_div; unsigned long timeout_jiffies; - struct tasklet_struct finish_tasklet; + struct work_struct finish_bh_work; struct timer_list timer; struct mmc_request *req; @@ -463,7 +464,7 @@ static void tifm_sd_check_status(struct tifm_sd *host) } } finish_request: - tasklet_schedule(&host->finish_tasklet); + queue_work(system_bh_wq, &host->finish_bh_work); } /* Called from interrupt handler */ @@ -723,9 +724,9 @@ static void tifm_sd_request(struct mmc_host *mmc, struct mmc_request *mrq) mmc_request_done(mmc, mrq); } -static void tifm_sd_end_cmd(struct tasklet_struct *t) +static void tifm_sd_end_cmd(struct work_struct *t) { - struct tifm_sd *host = from_tasklet(host, t, finish_tasklet); + struct tifm_sd *host = from_work(host, t, finish_bh_work); struct tifm_dev *sock = host->dev; struct mmc_host *mmc = tifm_get_drvdata(sock); struct mmc_request *mrq; @@ -960,7 +961,7 @@ static int tifm_sd_probe(struct tifm_dev *sock) */ mmc->max_busy_timeout = TIFM_MMCSD_REQ_TIMEOUT_MS; - tasklet_setup(&host->finish_tasklet, tifm_sd_end_cmd); + INIT_WORK(&host->finish_bh_work, tifm_sd_end_cmd); timer_setup(&host->timer, tifm_sd_abort, 0); mmc->ops = &tifm_sd_ops; @@ -999,7 +1000,7 @@ static void tifm_sd_remove(struct tifm_dev *sock) writel(0, sock->addr + SOCK_MMCSD_INT_ENABLE); spin_unlock_irqrestore(&sock->lock, flags); - tasklet_kill(&host->finish_tasklet); + cancel_work_sync(&host->finish_bh_work); spin_lock_irqsave(&sock->lock, flags); if (host->req) { @@ -1009,7 +1010,7 @@ static void tifm_sd_remove(struct tifm_dev *sock) host->req->cmd->error = -ENOMEDIUM; if (host->req->stop) host->req->stop->error = -ENOMEDIUM; - tasklet_schedule(&host->finish_tasklet); + queue_work(system_bh_wq, &host->finish_bh_work); } spin_unlock_irqrestore(&sock->lock, flags); mmc_remove_host(mmc); diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h index de56e6534aea..63000d9c7030 100644 --- a/drivers/mmc/host/tmio_mmc.h +++ b/drivers/mmc/host/tmio_mmc.h @@ -21,6 +21,7 @@ #include <linux/scatterlist.h> #include <linux/spinlock.h> #include <linux/interrupt.h> +#include <linux/workqueue.h> #define CTL_SD_CMD 0x00 #define CTL_ARG_REG 0x04 @@ -156,7 +157,7 @@ struct tmio_mmc_host { bool dma_on; struct dma_chan *chan_rx; struct dma_chan *chan_tx; - struct tasklet_struct dma_issue; + struct work_struct dma_issue; struct scatterlist bounce_sg; u8 *bounce_buf; diff --git a/drivers/mmc/host/tmio_mmc_core.c b/drivers/mmc/host/tmio_mmc_core.c index 93e912afd3ae..51bd2365795b 100644 --- a/drivers/mmc/host/tmio_mmc_core.c +++ b/drivers/mmc/host/tmio_mmc_core.c @@ -608,7 +608,7 @@ static void tmio_mmc_cmd_irq(struct tmio_mmc_host *host, unsigned int stat) } else { tmio_mmc_disable_mmc_irqs(host, TMIO_MASK_READOP); - tasklet_schedule(&host->dma_issue); + queue_work(system_bh_wq, &host->dma_issue); } } else { if (!host->dma_on) { @@ -616,7 +616,7 @@ static void tmio_mmc_cmd_irq(struct tmio_mmc_host *host, unsigned int stat) } else { tmio_mmc_disable_mmc_irqs(host, TMIO_MASK_WRITEOP); - tasklet_schedule(&host->dma_issue); + queue_work(system_bh_wq, &host->dma_issue); } } } else { diff --git a/drivers/mmc/host/uniphier-sd.c b/drivers/mmc/host/uniphier-sd.c index 1404989e6151..417fd13efdfd 100644 --- a/drivers/mmc/host/uniphier-sd.c +++ b/drivers/mmc/host/uniphier-sd.c @@ -90,9 +90,9 @@ static void uniphier_sd_dma_endisable(struct tmio_mmc_host *host, int enable) } /* external DMA engine */ -static void uniphier_sd_external_dma_issue(struct tasklet_struct *t) +static void uniphier_sd_external_dma_issue(struct work_struct *t) { - struct tmio_mmc_host *host = from_tasklet(host, t, dma_issue); + struct tmio_mmc_host *host = from_work(host, t, dma_issue); struct uniphier_sd_priv *priv = uniphier_sd_priv(host); uniphier_sd_dma_endisable(host, 1); @@ -199,7 +199,7 @@ static void uniphier_sd_external_dma_request(struct tmio_mmc_host *host, host->chan_rx = chan; host->chan_tx = chan; - tasklet_setup(&host->dma_issue, uniphier_sd_external_dma_issue); + INIT_WORK(&host->dma_issue, uniphier_sd_external_dma_issue); } static void uniphier_sd_external_dma_release(struct tmio_mmc_host *host) @@ -236,9 +236,9 @@ static const struct tmio_mmc_dma_ops uniphier_sd_external_dma_ops = { .dataend = uniphier_sd_external_dma_dataend, }; -static void uniphier_sd_internal_dma_issue(struct tasklet_struct *t) +static void uniphier_sd_internal_dma_issue(struct work_struct *t) { - struct tmio_mmc_host *host = from_tasklet(host, t, dma_issue); + struct tmio_mmc_host *host = from_work(host, t, dma_issue); unsigned long flags; spin_lock_irqsave(&host->lock, flags); @@ -317,7 +317,7 @@ static void uniphier_sd_internal_dma_request(struct tmio_mmc_host *host, host->chan_tx = (void *)0xdeadbeaf; - tasklet_setup(&host->dma_issue, uniphier_sd_internal_dma_issue); + INIT_WORK(&host->dma_issue, uniphier_sd_internal_dma_issue); } static void uniphier_sd_internal_dma_release(struct tmio_mmc_host *host) diff --git a/drivers/mmc/host/via-sdmmc.c b/drivers/mmc/host/via-sdmmc.c index ba6044b16e07..f77457105ec3 100644 --- a/drivers/mmc/host/via-sdmmc.c +++ b/drivers/mmc/host/via-sdmmc.c @@ -12,6 +12,7 @@ #include <linux/interrupt.h> #include <linux/mmc/host.h> +#include <linux/workqueue.h> #define DRV_NAME "via_sdmmc" @@ -307,7 +308,7 @@ struct via_crdr_mmc_host { struct sdhcreg pm_sdhc_reg; struct work_struct carddet_work; - struct tasklet_struct finish_tasklet; + struct work_struct finish_bh_work; struct timer_list timer; spinlock_t lock; @@ -643,7 +644,7 @@ static void via_sdc_finish_data(struct via_crdr_mmc_host *host) if (data->stop) via_sdc_send_command(host, data->stop); else - tasklet_schedule(&host->finish_tasklet); + queue_work(system_bh_wq, &host->finish_bh_work); } static void via_sdc_finish_command(struct via_crdr_mmc_host *host) @@ -653,7 +654,7 @@ static void via_sdc_finish_command(struct via_crdr_mmc_host *host) host->cmd->error = 0; if (!host->cmd->data) - tasklet_schedule(&host->finish_tasklet); + queue_work(system_bh_wq, &host->finish_bh_work); host->cmd = NULL; } @@ -682,7 +683,7 @@ static void via_sdc_request(struct mmc_host *mmc, struct mmc_request *mrq) status = readw(host->sdhc_mmiobase + VIA_CRDR_SDSTATUS); if (!(status & VIA_CRDR_SDSTS_SLOTG) || host->reject) { host->mrq->cmd->error = -ENOMEDIUM; - tasklet_schedule(&host->finish_tasklet); + queue_work(system_bh_wq, &host->finish_bh_work); } else { via_sdc_send_command(host, mrq->cmd); } @@ -848,7 +849,7 @@ static void via_sdc_cmd_isr(struct via_crdr_mmc_host *host, u16 intmask) host->cmd->error = -EILSEQ; if (host->cmd->error) - tasklet_schedule(&host->finish_tasklet); + queue_work(system_bh_wq, &host->finish_bh_work); else if (intmask & VIA_CRDR_SDSTS_CRD) via_sdc_finish_command(host); } @@ -955,16 +956,16 @@ static void via_sdc_timeout(struct timer_list *t) sdhost->cmd->error = -ETIMEDOUT; else sdhost->mrq->cmd->error = -ETIMEDOUT; - tasklet_schedule(&sdhost->finish_tasklet); + queue_work(system_bh_wq, &sdhost->finish_bh_work); } } spin_unlock_irqrestore(&sdhost->lock, flags); } -static void via_sdc_tasklet_finish(struct tasklet_struct *t) +static void via_sdc_finish_bh_work(struct work_struct *t) { - struct via_crdr_mmc_host *host = from_tasklet(host, t, finish_tasklet); + struct via_crdr_mmc_host *host = from_work(host, t, finish_bh_work); unsigned long flags; struct mmc_request *mrq; @@ -1005,7 +1006,7 @@ static void via_sdc_card_detect(struct work_struct *work) pr_err("%s: Card removed during transfer!\n", mmc_hostname(host->mmc)); host->mrq->cmd->error = -ENOMEDIUM; - tasklet_schedule(&host->finish_tasklet); + queue_work(system_bh_wq, &host->finish_bh_work); } spin_unlock_irqrestore(&host->lock, flags); @@ -1051,7 +1052,7 @@ static void via_init_mmc_host(struct via_crdr_mmc_host *host) INIT_WORK(&host->carddet_work, via_sdc_card_detect); - tasklet_setup(&host->finish_tasklet, via_sdc_tasklet_finish); + INIT_WORK(&host->finish_bh_work, via_sdc_finish_bh_work); addrbase = host->sdhc_mmiobase; writel(0x0, addrbase + VIA_CRDR_SDINTMASK); @@ -1193,7 +1194,7 @@ static void via_sd_remove(struct pci_dev *pcidev) sdhost->mrq->cmd->error = -ENOMEDIUM; if (sdhost->mrq->stop) sdhost->mrq->stop->error = -ENOMEDIUM; - tasklet_schedule(&sdhost->finish_tasklet); + queue_work(system_bh_wq, &sdhost->finish_bh_work); } spin_unlock_irqrestore(&sdhost->lock, flags); @@ -1203,7 +1204,7 @@ static void via_sd_remove(struct pci_dev *pcidev) del_timer_sync(&sdhost->timer); - tasklet_kill(&sdhost->finish_tasklet); + cancel_work_sync(&sdhost->finish_bh_work); /* switch off power */ gatt = readb(sdhost->pcictrl_mmiobase + VIA_CRDR_PCICLKGATT); diff --git a/drivers/mmc/host/wbsd.c b/drivers/mmc/host/wbsd.c index f0562f712d98..6e20405d0430 100644 --- a/drivers/mmc/host/wbsd.c +++ b/drivers/mmc/host/wbsd.c @@ -459,7 +459,7 @@ static void wbsd_empty_fifo(struct wbsd_host *host) * FIFO threshold interrupts properly. */ if ((data->blocks * data->blksz - data->bytes_xfered) < 16) - tasklet_schedule(&host->fifo_tasklet); + queue_work(system_bh_wq, &host->fifo_bh_work); } static void wbsd_fill_fifo(struct wbsd_host *host) @@ -524,7 +524,7 @@ static void wbsd_fill_fifo(struct wbsd_host *host) * 'FIFO empty' under certain conditions. So we * need to be a bit more pro-active. */ - tasklet_schedule(&host->fifo_tasklet); + queue_work(system_bh_wq, &host->fifo_bh_work); } static void wbsd_prepare_data(struct wbsd_host *host, struct mmc_data *data) @@ -746,7 +746,7 @@ static void wbsd_request(struct mmc_host *mmc, struct mmc_request *mrq) struct mmc_command *cmd; /* - * Disable tasklets to avoid a deadlock. + * Disable bh works to avoid a deadlock. */ spin_lock_bh(&host->lock); @@ -821,7 +821,7 @@ static void wbsd_request(struct mmc_host *mmc, struct mmc_request *mrq) * Dirty fix for hardware bug. */ if (host->dma == -1) - tasklet_schedule(&host->fifo_tasklet); + queue_work(system_bh_wq, &host->fifo_bh_work); spin_unlock_bh(&host->lock); @@ -961,13 +961,13 @@ static void wbsd_reset_ignore(struct timer_list *t) * Card status might have changed during the * blackout. */ - tasklet_schedule(&host->card_tasklet); + queue_work(system_bh_wq, &host->card_bh_work); spin_unlock_bh(&host->lock); } /* - * Tasklets + * BH Works */ static inline struct mmc_data *wbsd_get_data(struct wbsd_host *host) @@ -987,9 +987,9 @@ static inline struct mmc_data *wbsd_get_data(struct wbsd_host *host) return host->mrq->cmd->data; } -static void wbsd_tasklet_card(struct tasklet_struct *t) +static void wbsd_card_bh_work(struct work_struct *t) { - struct wbsd_host *host = from_tasklet(host, t, card_tasklet); + struct wbsd_host *host = from_work(host, t, card_bh_work); u8 csr; int delay = -1; @@ -1020,7 +1020,7 @@ static void wbsd_tasklet_card(struct tasklet_struct *t) wbsd_reset(host); host->mrq->cmd->error = -ENOMEDIUM; - tasklet_schedule(&host->finish_tasklet); + queue_work(system_bh_wq, &host->finish_bh_work); } delay = 0; @@ -1036,9 +1036,9 @@ static void wbsd_tasklet_card(struct tasklet_struct *t) mmc_detect_change(host->mmc, msecs_to_jiffies(delay)); } -static void wbsd_tasklet_fifo(struct tasklet_struct *t) +static void wbsd_fifo_bh_work(struct work_struct *t) { - struct wbsd_host *host = from_tasklet(host, t, fifo_tasklet); + struct wbsd_host *host = from_work(host, t, fifo_bh_work); struct mmc_data *data; spin_lock(&host->lock); @@ -1060,16 +1060,16 @@ static void wbsd_tasklet_fifo(struct tasklet_struct *t) */ if (host->num_sg == 0) { wbsd_write_index(host, WBSD_IDX_FIFOEN, 0); - tasklet_schedule(&host->finish_tasklet); + queue_work(system_bh_wq, &host->finish_bh_work); } end: spin_unlock(&host->lock); } -static void wbsd_tasklet_crc(struct tasklet_struct *t) +static void wbsd_crc_bh_work(struct work_struct *t) { - struct wbsd_host *host = from_tasklet(host, t, crc_tasklet); + struct wbsd_host *host = from_work(host, t, crc_bh_work); struct mmc_data *data; spin_lock(&host->lock); @@ -1085,15 +1085,15 @@ static void wbsd_tasklet_crc(struct tasklet_struct *t) data->error = -EILSEQ; - tasklet_schedule(&host->finish_tasklet); + queue_work(system_bh_wq, &host->finish_bh_work); end: spin_unlock(&host->lock); } -static void wbsd_tasklet_timeout(struct tasklet_struct *t) +static void wbsd_timeout_bh_work(struct work_struct *t) { - struct wbsd_host *host = from_tasklet(host, t, timeout_tasklet); + struct wbsd_host *host = from_work(host, t, timeout_bh_work); struct mmc_data *data; spin_lock(&host->lock); @@ -1109,15 +1109,15 @@ static void wbsd_tasklet_timeout(struct tasklet_struct *t) data->error = -ETIMEDOUT; - tasklet_schedule(&host->finish_tasklet); + queue_work(system_bh_wq, &host->finish_bh_work); end: spin_unlock(&host->lock); } -static void wbsd_tasklet_finish(struct tasklet_struct *t) +static void wbsd_finish_bh_work(struct work_struct *t) { - struct wbsd_host *host = from_tasklet(host, t, finish_tasklet); + struct wbsd_host *host = from_work(host, t, finish_bh_work); struct mmc_data *data; spin_lock(&host->lock); @@ -1156,18 +1156,18 @@ static irqreturn_t wbsd_irq(int irq, void *dev_id) host->isr |= isr; /* - * Schedule tasklets as needed. + * Schedule bh work as needed. */ if (isr & WBSD_INT_CARD) - tasklet_schedule(&host->card_tasklet); + queue_work(system_bh_wq, &host->card_bh_work); if (isr & WBSD_INT_FIFO_THRE) - tasklet_schedule(&host->fifo_tasklet); + queue_work(system_bh_wq, &host->fifo_bh_work); if (isr & WBSD_INT_CRC) - tasklet_hi_schedule(&host->crc_tasklet); + queue_work(system_bh_highpri_wq, &host->crc_bh_work); if (isr & WBSD_INT_TIMEOUT) - tasklet_hi_schedule(&host->timeout_tasklet); + queue_work(system_bh_highpri_wq, &host->timeout_bh_work); if (isr & WBSD_INT_TC) - tasklet_schedule(&host->finish_tasklet); + queue_work(system_bh_wq, &host->finish_bh_work); return IRQ_HANDLED; } @@ -1443,13 +1443,13 @@ static int wbsd_request_irq(struct wbsd_host *host, int irq) int ret; /* - * Set up tasklets. Must be done before requesting interrupt. + * Set up bh works. Must be done before requesting interrupt. */ - tasklet_setup(&host->card_tasklet, wbsd_tasklet_card); - tasklet_setup(&host->fifo_tasklet, wbsd_tasklet_fifo); - tasklet_setup(&host->crc_tasklet, wbsd_tasklet_crc); - tasklet_setup(&host->timeout_tasklet, wbsd_tasklet_timeout); - tasklet_setup(&host->finish_tasklet, wbsd_tasklet_finish); + INIT_WORK(&host->card_bh_work, wbsd_card_bh_work); + INIT_WORK(&host->fifo_bh_work, wbsd_fifo_bh_work); + INIT_WORK(&host->crc_bh_work, wbsd_crc_bh_work); + INIT_WORK(&host->timeout_bh_work, wbsd_timeout_bh_work); + INIT_WORK(&host->finish_bh_work, wbsd_finish_bh_work); /* * Allocate interrupt. @@ -1472,11 +1472,11 @@ static void wbsd_release_irq(struct wbsd_host *host) host->irq = 0; - tasklet_kill(&host->card_tasklet); - tasklet_kill(&host->fifo_tasklet); - tasklet_kill(&host->crc_tasklet); - tasklet_kill(&host->timeout_tasklet); - tasklet_kill(&host->finish_tasklet); + cancel_work_sync(&host->card_bh_work); + cancel_work_sync(&host->fifo_bh_work); + cancel_work_sync(&host->crc_bh_work); + cancel_work_sync(&host->timeout_bh_work); + cancel_work_sync(&host->finish_bh_work); } /* diff --git a/drivers/mmc/host/wbsd.h b/drivers/mmc/host/wbsd.h index be30b4d8ce4c..970886831305 100644 --- a/drivers/mmc/host/wbsd.h +++ b/drivers/mmc/host/wbsd.h @@ -171,11 +171,11 @@ struct wbsd_host int irq; /* Interrupt */ int dma; /* DMA channel */ - struct tasklet_struct card_tasklet; /* Tasklet structures */ - struct tasklet_struct fifo_tasklet; - struct tasklet_struct crc_tasklet; - struct tasklet_struct timeout_tasklet; - struct tasklet_struct finish_tasklet; + struct work_struct card_bh_work; /* Work structures */ + struct work_struct fifo_bh_work; + struct work_struct crc_bh_work; + struct work_struct timeout_bh_work; + struct work_struct finish_bh_work; struct timer_list ignore_timer; /* Ignore detection timer */ };