[PATCH] mmc: dw_mmc: Reset DMA before enabling IDMAC

[Jaehoon Chung]

Acked-by: Jaehoon Chung <jh80.chung at samsung.com>

On 10/07/2014 03:11 AM, Doug Anderson wrote:
> Sonny,
> 
> On Mon, Oct 6, 2014 at 10:53 AM, Sonny Rao <sonnyrao at chromium.org> wrote:
>> We've already got a reset of DMA after it's done.  Add one before we
>> start DMA too.  This fixes a data corruption on Rockchip SoCs which
>> will get bad data when doing a DMA transfer after doing a PIO transfer.
>>
>> We tested this on an Exynos 5800 with HS200 and didn't notice any
>> difference in sequential read throughput.
>>
>> Signed-off-by: Sonny Rao <sonnyrao at chromium.org>
>> Signed-off-by: Doug Anderson <dianders at chromium.org>
>> ---
>>  drivers/mmc/host/dw_mmc.c | 4 ++++
>>  1 file changed, 4 insertions(+)
> 
> Reviewed-by: Doug Anderson <dianders at chromium.org>
> Tested-by: Doug Anderson <dianders at chromium.org>
>