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mmc: sdio: avoid using NULL sdio_irq_thread pointer 

For Freescale QorIQ LS1021AQDS board, there is a SDIO interrupt
in the process of resume without inserting SD adapter because of
some unknown issue. But the driver doesn't assign sdio_irq_thread
pointer. This will block the resume of kernel. This patch is used
to avoid using NULL sdio_irq_thread pointer.

Signed-off-by: Yangbo Lu <yangbo.lu@freescale.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Yangbo Lu 2015-07-10 11:36:45 +08:00 committed by Ulf Hansson
parent 4c06654c47
commit f13e5b9f3c
1 changed files with 2 additions and 1 deletions
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3
include/linux/mmc/host.h
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@ -412,7 +412,8 @@ static inline void mmc_signal_sdio_irq(struct mmc_host *host)
{
host->ops->enable_sdio_irq(host, 0);
host->sdio_irq_pending = true;
wake_up_process(host->sdio_irq_thread);
if (host->sdio_irq_thread)
wake_up_process(host->sdio_irq_thread);
}
void sdio_run_irqs(struct mmc_host *host);