mmc: block: Add CMD13 polling for MMC IOCTLS with R1B response

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MMC IOCTLS with R1B responses may cause the card to enter the busy state,
which means it's not ready to receive a new request. To prevent new
requests from being sent to the card, use a CMD13 polling loop to verify
that the card returns to the transfer state, before completing the request.

Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Cc: stable@vger.kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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Chaotian Jing 2019-09-05 15:53:18 +08:00 • committed by Ulf Hansson

parent 3869468e0c

commit a0d4c7eb71

1 changed files with 55 additions and 92 deletions

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147

drivers/mmc/core/block.c

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