On 30 September 2015 at 11:37, Chaotian Jing <chaotian.jing@xxxxxxxxxxxx> wrote:
> When get a CRC error, start the mmc_retune, it will issue CMD19/CMD21
> to do tune, assume there were 10 clock phase need to try, phase 0 to
> phase 6 is ok, phase 7 to phase 9 is NG, we try it from 0 to 9, so
> the last CMD19/CMD21 will get CRC error, host->need_retune was set and
> cause mmc_retune was called, then dead loop of mmc_retune
>
> Signed-off-by: Chaotian Jing <chaotian.jing@xxxxxxxxxxxx>
Thanks Chaotian!
I have applied this for fixes and added the following tag:
Fixes: bd11e8bd03ca ("mmc: core: Flag re-tuning is needed on CRC errors")
Kind regards
Uffe
> ---
> drivers/mmc/core/core.c | 6 ++++--
> 1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
> index 0520064..a3eb20b 100644
> --- a/drivers/mmc/core/core.c
> +++ b/drivers/mmc/core/core.c
> @@ -134,9 +134,11 @@ void mmc_request_done(struct mmc_host *host, struct mmc_request *mrq)
> int err = cmd->error;
>
> /* Flag re-tuning needed on CRC errors */
> - if (err == -EILSEQ || (mrq->sbc && mrq->sbc->error == -EILSEQ) ||
> + if ((cmd->opcode != MMC_SEND_TUNING_BLOCK &&
> + cmd->opcode != MMC_SEND_TUNING_BLOCK_HS200) &&
> + (err == -EILSEQ || (mrq->sbc && mrq->sbc->error == -EILSEQ) ||
> (mrq->data && mrq->data->error == -EILSEQ) ||
> - (mrq->stop && mrq->stop->error == -EILSEQ))
> + (mrq->stop && mrq->stop->error == -EILSEQ)))
> mmc_retune_needed(host);
>
> if (err && cmd->retries && mmc_host_is_spi(host)) {
> --
> 1.8.1.1.dirty
>
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