RE: [RFT] mmc: tmio: reset device on timeout, too

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Hi Wolfram-san,

> From: Wolfram Sang, Sent: Friday, August 21, 2020 5:17 PM
> 
> When a command response times out, the TMIO driver has been resetting
> the controller ever since. However, this means some initialization like
> bus width or tuning settings will be forgotten. To ensure proper working
> in all code paths, we will enforce a reset of the remote device, too.
> Many thanks to the Renesas BSP team for the detailed description of the
> problem.
> 
> Reported-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>
> Signed-off-by: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>
> ---
> 
> This patch depends on the TMIO reset refactorization:
> 
> [RFT 0/6] mmc: refactor reset callbacks
> 
> Looking also for tests here. Thanks!

Thank you for the patch!

Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>

Also, I tested on R-Car H3 ES3.0 and confirmed that this patch resolved
an issue which any commands of eMMC could not work after
tmio_mmc_reset_work() was called. So,

Tested-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>

Best regards,
Yoshihiro Shimoda





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