Messages in this thread | | | Date | Wed, 08 Oct 2014 08:59:46 +0900 | From | Jaehoon Chung <> | Subject | Re: [PATCH] mmc: dw_mmc: Reset DMA before enabling IDMAC |
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Acked-by: Jaehoon Chung <jh80.chung@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@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@chromium.org> >> Signed-off-by: Doug Anderson <dianders@chromium.org> >> --- >> drivers/mmc/host/dw_mmc.c | 4 ++++ >> 1 file changed, 4 insertions(+) > > Reviewed-by: Doug Anderson <dianders@chromium.org> > Tested-by: Doug Anderson <dianders@chromium.org> >
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