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.
Reported-by: Stephen Warren <swarren@xxxxxxxxxxxxx>
Reported-by: Tuomas Tynkkynen <ttynkkynen@xxxxxxxxxx>
Cc: Jaehoon Chung <jh80.chung@xxxxxxxxxxx>
Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
---
drivers/mmc/core/bus.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c
index 4c0decf..d4b99bb 100644
--- a/drivers/mmc/core/bus.c
+++ b/drivers/mmc/core/bus.c
@@ -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);
--
1.7.10
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