| Message ID | 1434451039-18195-2-git-send-email-vigneshr@ti.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Hi Vignesh, 2015-06-16 12:37 GMT+02:00 Vignesh R <vigneshr@ti.com>: > From: Kishon Vijay Abraham I <kishon@ti.com> > > DTO/DCRC errors were not being informed to the mmc core since > commit ae4bf788ee9b ("mmc: omap_hsmmc: consolidate error report handling of > HSMMC IRQ"). This commit made sure 'end_trans' is never set on DTO/DCRC > errors. This is because after this commit 'host->data' is checked after > it has been cleared to NULL by omap_hsmmc_dma_cleanup(). > > Because 'end_trans' is never set, omap_hsmmc_xfer_done() is never invoked > making core layer not to be aware of DTO/DCRC errors. Because of this > any command invoked after DTO/DCRC error leads to a hang. > > Fix this by checking for 'host->data' before it is actually cleared. This really fixes the problem, thanks for the analysis TESTED-BY > > Fixes: ae4bf788ee9b ("mmc: omap_hsmmc: consolidate error report handling of > HSMMC IRQ") > > CC: stable@vger.kernel.org > Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> > Signed-off-by: Vignesh R <vigneshr@ti.com> > --- > drivers/mmc/host/omap_hsmmc.c | 8 ++++---- > 1 file changed, 4 insertions(+), 4 deletions(-) > > diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c > index 9df2b6801f76..d0abdffb0d7c 100644 > --- a/drivers/mmc/host/omap_hsmmc.c > +++ b/drivers/mmc/host/omap_hsmmc.c > @@ -1062,6 +1062,10 @@ static void omap_hsmmc_do_irq(struct omap_hsmmc_host *host, int status) > > if (status & (CTO_EN | CCRC_EN)) > end_cmd = 1; > + if (host->data || host->response_busy) { > + end_trans = !end_cmd; > + host->response_busy = 0; > + } > if (status & (CTO_EN | DTO_EN)) > hsmmc_command_incomplete(host, -ETIMEDOUT, end_cmd); > else if (status & (CCRC_EN | DCRC_EN)) > @@ -1081,10 +1085,6 @@ static void omap_hsmmc_do_irq(struct omap_hsmmc_host *host, int status) > } > dev_dbg(mmc_dev(host->mmc), "AC12 err: 0x%x\n", ac12); > } > - if (host->data || host->response_busy) { > - end_trans = !end_cmd; > - host->response_busy = 0; > - } > } > > OMAP_HSMMC_WRITE(host->base, STAT, status); > -- > 2.4.1 > -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in
diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c index 9df2b6801f76..d0abdffb0d7c 100644 --- a/drivers/mmc/host/omap_hsmmc.c +++ b/drivers/mmc/host/omap_hsmmc.c @@ -1062,6 +1062,10 @@ static void omap_hsmmc_do_irq(struct omap_hsmmc_host *host, int status) if (status & (CTO_EN | CCRC_EN)) end_cmd = 1; + if (host->data || host->response_busy) { + end_trans = !end_cmd; + host->response_busy = 0; + } if (status & (CTO_EN | DTO_EN)) hsmmc_command_incomplete(host, -ETIMEDOUT, end_cmd); else if (status & (CCRC_EN | DCRC_EN)) @@ -1081,10 +1085,6 @@ static void omap_hsmmc_do_irq(struct omap_hsmmc_host *host, int status) } dev_dbg(mmc_dev(host->mmc), "AC12 err: 0x%x\n", ac12); } - if (host->data || host->response_busy) { - end_trans = !end_cmd; - host->response_busy = 0; - } } OMAP_HSMMC_WRITE(host->base, STAT, status);