mmc: mtk-sd: Clear interrupts when cqe off/disable

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[ Upstream commit cc5d169260 ]

Currently we don't clear MSDC interrupts when cqe off/disable, which led
to the data complete interrupt will be reserved for the next command.
If the next command with data transfer after cqe off/disable, we process
the CMD ready interrupt and trigger DMA start for data, but the data
complete interrupt is already exists, then SW assume that the data transfer
is complete, SW will trigger DMA stop, but the data may not be transmitted
yet or is transmitting, so we may encounter the following error:
mtk-msdc 11230000.mmc: CMD bus busy detected.

Signed-off-by: Wenbin Mei <wenbin.mei@mediatek.com>
Fixes: 88bd652b3c ("mmc: mediatek: command queue support")
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20220728080048.21336-1-wenbin.mei@mediatek.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Wenbin Mei 2022-07-28 16:00:48 +08:00 • committed by Greg Kroah-Hartman

parent 1d7df13d22

commit 1c137c46d1

1 changed files with 6 additions and 0 deletions

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drivers/mmc/host/mtk-sd.c

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