[1/4] mmc: sdio: Fix potential NULL pointer error in mmc_sdio_init_card()

Message ID 20200430091640.455-2-ulf.hansson@linaro.org
State New
Headers show
Series
  • mmc: sdio: Fix various issues in mmc_sdio_init_card()
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Commit Message

Ulf Hansson April 30, 2020, 9:16 a.m.
During some scenarios mmc_sdio_init_card() runs a retry path for the UHS-I
specific initialization, which leads to removal of the previously allocated
card. A new card is then re-allocated while retrying.

However, in one of the corresponding error paths we may end up to remove an
already removed card, which likely leads to a NULL pointer exception. So,
let's fix this.

Fixes: 5fc3d80ef496 ("mmc: sdio: don't use rocr to check if the card could support UHS mode")
Cc: <stable@vger.kernel.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

---
 drivers/mmc/core/sdio.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

-- 
2.20.1

Patch

diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c
index ebb387aa5158..d35679e6e6aa 100644
--- a/drivers/mmc/core/sdio.c
+++ b/drivers/mmc/core/sdio.c
@@ -718,9 +718,8 @@  static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr,
 			/* Retry init sequence, but without R4_18V_PRESENT. */
 			retries = 0;
 			goto try_again;
-		} else {
-			goto remove;
 		}
+		return err;
 	}
 
 	/*