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mmc: core: Fixup Oops for SDIO shutdown

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Commit "mmc: core: Handle card shutdown from mmc_bus" introduced an
Oops in the shutdown sequence for SDIO.

The drv pointer, does not exist for SDIO since the probing of the SDIO
card from the mmc_bus perspective is expected to fail by returning
-ENODEV.

This patch adds the proper check for the pointer before calling it.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reported-by: Stephen Warren <swarren@wwwdotorg.org>
Reported-by: Tuomas Tynkkynen <ttynkkynen@nvidia.com>
Tested-by: Tuomas Tynkkynen <ttynkkynen@nvidia.com>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Ulf Hansson 2013-07-02 12:53:01 +02:00 committed by Chris Ball
parent 30d025c0f7
commit 203bb5af65
1 changed files with 2 additions and 1 deletions
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3
drivers/mmc/core/bus.c
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@ -129,7 +129,8 @@ static void mmc_bus_shutdown(struct device *dev)
struct mmc_host *host = card->host;
int ret;
drv->shutdown(card);
if (dev->driver && drv->shutdown)
drv->shutdown(card);
if (host->bus_ops->shutdown) {
ret = host->bus_ops->shutdown(host);