[PATCH v2] mmc: dw_mmc: fix bug that cause mmc_test failture

[Doug Anderson]

Addy,

On Thu, Feb 19, 2015 at 6:55 PM, Addy Ke <addy.ke at rock-chips.com> wrote:
> The STOP command can terminate a data transfer between a memory card and
> mmc controller.
>
> As show in Synopsys DesignWare Cores Mobile Stroage Host Databook:
> Data timeout and Data end-bit error will terminate further data transfer
> by mmc controller. So we should not send abort command to terminate a
> data transfer again if we got DRTO and EBE interrupt.
>
> After this patch, all mmc_test cases can pass on RK3288-Pink2 board.
>
> Signed-off-by: Addy Ke <addy.ke at rock-chips.com>
> ---
> Changes in v2:
> - DRTO and EBE are both set, should not send abort command too,
>   suggested by Doug Anderson.
>
>  drivers/mmc/host/dw_mmc.c | 10 ++++++++--
>  1 file changed, 8 insertions(+), 2 deletions(-)

I also suggested that you change the subject to "mmc: dw_mmc: fix
mmc_test by not sending abort for DRTO / EBE errors" which you didn't
do.  ...I guess that's not critical.  Perhaps Jaehoon (who is
collecting patches for Ulf now I think) can adjust the subject when he
applies.

In any case, v2 fixes my problems and seems OK to me.

Reviewed-by: Doug Anderson <dianders at chromium.org>

On rk3288 on a 3.14 kernel w/ lotsa backports:
Tested-by: Doug Anderson <dianders at chromium.org>