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linux-stable/drivers/mmc
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Jaehoon Chung 647f80a1f2 mmc: dw_mmc: fix the error handling for dma operation 
When dma->start is failed,then it has to fall back to PIO mode
for current transfer.

But Host controller was already set to bits relevant to DMA operation.
If needs to use the PIO mode, Host controller has to stop the DMA
operation. (It's more stable than now.)

When it occurred error, it's not running any request.

Fixes: 3fc7eaef44 ("mmc: dw_mmc: Add external dma interface support")
Reported-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Cc: <stable@vger.kernel.org> # v4.3+
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2016-11-21 11:08:28 +01:00
..
card mmc: mmc_test: Fix "Commands during non-blocking write" tests 2016-11-07 13:28:38 +01:00
core mmc: mmc: Use 500ms as the default generic CMD6 timeout 2016-11-07 13:29:52 +01:00
host mmc: dw_mmc: fix the error handling for dma operation 2016-11-21 11:08:28 +01:00
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