From: Ritesh Harjani <riteshh@xxxxxxxxxxxxxx>
Make host->card as NULL when card is removed otherwise
we do see some kernel crashes in async contexts,
where host->card is referred (as dangling pointer).
Signed-off-by: Ritesh Harjani <riteshh@xxxxxxxxxxxxxx>
Signed-off-by: Bao D. Nguyen <nguyenb@xxxxxxxxxxxxxx>
Signed-off-by: Asutosh Das <asutoshd@xxxxxxxxxxxxxx>
---
drivers/mmc/core/bus.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c
index 74de3f2..e83821c 100644
--- a/drivers/mmc/core/bus.c
+++ b/drivers/mmc/core/bus.c
@@ -247,12 +247,15 @@ void mmc_unregister_driver(struct mmc_driver *drv)
static void mmc_release_card(struct device *dev)
{
struct mmc_card *card = mmc_dev_to_card(dev);
+ struct mmc_host *host = card->host;
sdio_free_common_cis(card);
kfree(card->info);
kfree(card);
+ if (host)
+ host->card = NULL;
}
/*
--
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