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From:   "DooHyun Hwang" <dh0421.hwang@samsung.com>
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Subject: RE: [PATCH] mmc: core: add a power cycle when CMD11 fails
Date:   Thu, 25 Feb 2021 16:43:09 +0900
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Dear Maintainers and commiters.

Please review this patch for updating.

Thanks and regards.
DooHyun Hwang.

On 17/02/10 4:59 am, DooHyun Hwang wrote:
>Subject: [PATCH] mmc: core: add a power cycle when CMD11 fails
>
>A power cycle is required if CMD11 fails.
>CMD11 failure should be handled as no response.
>
>If there is a timeout error that means no response to the CMD11, do not
>send the CMD11 again and the power cycle is required.
>Any other errors for CMD11 are the same because CMD11 failed.
>
>On some bad SD Card, CMD11 may fail but the card may have already invoked
>the voltage switch sequence.
>In this case, it is necessary to retry without voltage switching after
>power cycle.
>
>Signed-off-by: DooHyun Hwang <dh0421.hwang@samsung.com>