Hi Zhonghui, On Tue, Jul 08 2014, Fu, Zhonghui wrote: > Why add "mmc->caps2 |= MMC_CAP2_SDIO_IRQ_NOTHREAD;" ? How to fix this bug? > > Could you please give out some idea about this bug?
Jaehoon already gave you a patch to fix this bug. Here it is again in proper patch form. Please can you test it and let us know whether it fixes the crash? Thanks. From: Chris Ball <[email protected]> Subject: [PATCH] mmc: core: sdio: Fix unconditional wake_up_process() on sdio thread 781e989cf59 ("mmc: sdhci: convert to new SDIO IRQ handling") and bf3b5ec66bd ("mmc: sdio_irq: rework sdio irq handling") disabled the use of our own custom threaded IRQ handler, but left in an unconditional wake_up_process() on that handler at resume-time. Reported-by: Fu, Zhonghui <[email protected]> [Patch suggested by Jaehoon Chung] Signed-off-by: Chris Ball <[email protected]> --- drivers/mmc/core/sdio.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c index e636d9e..2a128e2 100644 --- a/drivers/mmc/core/sdio.c +++ b/drivers/mmc/core/sdio.c @@ -992,7 +992,8 @@ static int mmc_sdio_resume(struct mmc_host *host) } } - if (!err && host->sdio_irqs) + if (!err && host->sdio_irqs && + !(host->quirks & MMC_CAP2_SDIO_IRQ_NOTHREAD)) wake_up_process(host->sdio_irq_thread); mmc_release_host(host); -- Chris Ball <http://printf.net/> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
