| Message ID | 1314903957-24408-2-git-send-email-svenkatr@ti.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Fri, Sep 2, 2011 at 12:35 AM, Venkatraman S <svenkatr@ti.com> wrote: > Reuse omap_hsmmc_dma_cleanup even for normal dma teardown in > omap_hsmmc_dma_cb. Consolidate multiple points of dma unmap into a > single location in post_req function, to prevent double unmapping. > > Signed-off-by: Venkatraman S <svenkatr@ti.com> > --- > drivers/mmc/host/omap_hsmmc.c | 20 +++++--------------- > 1 files changed, 5 insertions(+), 15 deletions(-) > > diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c > index 21e4a79..5b7776c 100644 > --- a/drivers/mmc/host/omap_hsmmc.c > +++ b/drivers/mmc/host/omap_hsmmc.c > @@ -999,7 +999,8 @@ static void omap_hsmmc_dma_cleanup(struct omap_hsmmc_host *host, int errno) > { > int dma_ch; > > - host->data->error = errno; > + if (host->data) The condition check above becomes redundant since dma_cleanup is called during errors in omap_hsmmc_do_irq. Better have this check in the dma_cb where dma_cleanup is newly added. > + host->data->error = errno; > > spin_lock(&host->irq_lock); > dma_ch = host->dma_ch; > @@ -1007,12 +1008,8 @@ static void omap_hsmmc_dma_cleanup(struct omap_hsmmc_host *host, int errno) > spin_unlock(&host->irq_lock); > > if (host->use_dma && dma_ch != -1) { > - dma_unmap_sg(mmc_dev(host->mmc), host->data->sg, > - host->data->sg_len, > - omap_hsmmc_get_dma_dir(host, host->data)); > omap_free_dma(dma_ch); > } > - host->data = NULL; No need to remove the above one. > } > > /* > @@ -1370,7 +1367,7 @@ static void omap_hsmmc_dma_cb(int lch, u16 ch_status, void *cb_data) > { > struct omap_hsmmc_host *host = cb_data; > struct mmc_data *data; > - int dma_ch, req_in_progress; > + int req_in_progress; > > if (!(ch_status & OMAP_DMA_BLOCK_IRQ)) { > dev_warn(mmc_dev(host->mmc), "unexpected dma status %x\n", > @@ -1394,16 +1391,9 @@ static void omap_hsmmc_dma_cb(int lch, u16 ch_status, void *cb_data) > return; > } > > - if (!data->host_cookie) > - dma_unmap_sg(mmc_dev(host->mmc), data->sg, data->sg_len, > - omap_hsmmc_get_dma_dir(host, data)); > - > req_in_progress = host->req_in_progress; > - dma_ch = host->dma_ch; > - host->dma_ch = -1; > spin_unlock(&host->irq_lock); > - > - omap_free_dma(dma_ch); > + omap_hsmmc_dma_cleanup(host, 0); > > /* If DMA has finished after TC, complete the request */ > if (!req_in_progress) { > @@ -1575,7 +1565,7 @@ static void omap_hsmmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq, > struct omap_hsmmc_host *host = mmc_priv(mmc); > struct mmc_data *data = mrq->data; > > - if (host->use_dma) { Here also , the above conditional check is required. > + if (data->host_cookie) { > dma_unmap_sg(mmc_dev(host->mmc), data->sg, data->sg_len, > omap_hsmmc_get_dma_dir(host, data)); > data->host_cookie = 0; > -- > 1.7.1 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-omap" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c index 21e4a79..5b7776c 100644 --- a/drivers/mmc/host/omap_hsmmc.c +++ b/drivers/mmc/host/omap_hsmmc.c @@ -999,7 +999,8 @@ static void omap_hsmmc_dma_cleanup(struct omap_hsmmc_host *host, int errno) { int dma_ch; - host->data->error = errno; + if (host->data) + host->data->error = errno; spin_lock(&host->irq_lock); dma_ch = host->dma_ch; @@ -1007,12 +1008,8 @@ static void omap_hsmmc_dma_cleanup(struct omap_hsmmc_host *host, int errno) spin_unlock(&host->irq_lock); if (host->use_dma && dma_ch != -1) { - dma_unmap_sg(mmc_dev(host->mmc), host->data->sg, - host->data->sg_len, - omap_hsmmc_get_dma_dir(host, host->data)); omap_free_dma(dma_ch); } - host->data = NULL; } /* @@ -1370,7 +1367,7 @@ static void omap_hsmmc_dma_cb(int lch, u16 ch_status, void *cb_data) { struct omap_hsmmc_host *host = cb_data; struct mmc_data *data; - int dma_ch, req_in_progress; + int req_in_progress; if (!(ch_status & OMAP_DMA_BLOCK_IRQ)) { dev_warn(mmc_dev(host->mmc), "unexpected dma status %x\n", @@ -1394,16 +1391,9 @@ static void omap_hsmmc_dma_cb(int lch, u16 ch_status, void *cb_data) return; } - if (!data->host_cookie) - dma_unmap_sg(mmc_dev(host->mmc), data->sg, data->sg_len, - omap_hsmmc_get_dma_dir(host, data)); - req_in_progress = host->req_in_progress; - dma_ch = host->dma_ch; - host->dma_ch = -1; spin_unlock(&host->irq_lock); - - omap_free_dma(dma_ch); + omap_hsmmc_dma_cleanup(host, 0); /* If DMA has finished after TC, complete the request */ if (!req_in_progress) { @@ -1575,7 +1565,7 @@ static void omap_hsmmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq, struct omap_hsmmc_host *host = mmc_priv(mmc); struct mmc_data *data = mrq->data; - if (host->use_dma) { + if (data->host_cookie) { dma_unmap_sg(mmc_dev(host->mmc), data->sg, data->sg_len, omap_hsmmc_get_dma_dir(host, data)); data->host_cookie = 0;
Reuse omap_hsmmc_dma_cleanup even for normal dma teardown in omap_hsmmc_dma_cb. Consolidate multiple points of dma unmap into a single location in post_req function, to prevent double unmapping. Signed-off-by: Venkatraman S <svenkatr@ti.com> --- drivers/mmc/host/omap_hsmmc.c | 20 +++++--------------- 1 files changed, 5 insertions(+), 15 deletions(-)