Commit 1a54125d authored Apr 01, 2014 by Sahitya Tummala

mmc: sdhci-msm: fix issue with SD card tuning functionality



The commit 'e2598c - mmc: sdhci-msm: improve tuning process'
introduces NULL pointer dereference bug for SD 3.0 cards
when all the tuning phases pass. It uses mmc_card_mmc(card)
for checking the card type but card is initialized after
tuning is done for SD card and thus resulting in NULL
pointer dereference issue.

CRs-fixed: 640424
Change-Id: I59a8d5f017243d8391269bc98998bb37fc44f685
Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>

parent 27a70795

drivers/mmc/host/sdhci-msm.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -1022,7 +1022,8 @@ retry:
		}
		} while (++phase < 16);

		if ((tuned_phase_cnt == NUM_TUNING_PHASES) && mmc_card_mmc(card)) {
		if ((tuned_phase_cnt == NUM_TUNING_PHASES) &&
		card && mmc_card_mmc(card)) {
		/*
		* If all phases pass then its a problem. So change the card's
		* drive type to a different value, if supported and repeat