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mmc: core: stop trying to switch width when only one bit is supported

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mmc_select_bus_width() will try to switch to MMC_BUS_WIDTH_4 even if
MMC_CAP_4_BIT_DATA and MMC_CAP_8_BIT_DATA are not set in host->caps.
Return as soon as possible when those flags are not set

Fixes: 577fb13199 (mmc: rework selection of bus speed mode)
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Cc: <stable@vger.kernel.org> # 3.17
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Alexandre Belloni 2014-12-17 19:32:06 +01:00 committed by Ulf Hansson
parent 97bf6af1f9
commit 1c2d26e379
1 changed files with 1 additions and 1 deletions
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2
drivers/mmc/core/mmc.c
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@ -886,7 +886,7 @@ static int mmc_select_bus_width(struct mmc_card *card)
unsigned idx, bus_width = 0;
int err = 0;
if (!mmc_can_ext_csd(card) &&
if (!mmc_can_ext_csd(card) ||
!(host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA)))
return 0;