[PATCH v2 1/6] mmc: sdhci: clear auto cmd setting bits for no data cmds

[Fabio Estevam]

On Wed, Oct 30, 2013 at 12:09 PM, Dong Aisheng <b29396 at freescale.com> wrote:
> The auto cmd settings bits should be cleared before sending new commands
> or we may receive command timeout error for normal commands due to wrongly
> pre-sent auto cmd.
>
> e.g. we receive CMD13 timeout error due to ACMD23 is wrongly enabled
> by former data commands.
>
> mmc2: new high speed DDR MMC card at address 0001
> mmcblk1: mmc2:0001 SEM08G 7.39 GiB
> mmcblk1boot0: mmc2:0001 SEM08G partition 1 2.00 MiB
> mmcblk1boot1: mmc2:0001 SEM08G partition 2 2.00 MiB
> mmcblk1rpmb: mmc2:0001 SEM08G partition 3 128 KiB
>  mmcblk1: p1 p2 p3 p4 < p5 p6 p7 >
> mmc2: Timeout waiting for hardware interrupt.
>  mmcblk1boot1: unknown partition table
> mmc2: Timeout waiting for hardware interrupt.
>  mmcblk1boot0: unknown partition table
>
> Signed-off-by: Dong Aisheng <b29396 at freescale.com>

Thanks for the patch, Dong.

This fixes the eMMC interrupt timeout issue on mx6qsabresd.

I think we should mark it for stable. At least 3.11 and 3.12 have this
issue and your patch fixes it.

Regards,

Fabio Estevam