RE: [PATCH V2 1/6] mmc: block: Do not lose cache flush during CQE error recovery

[Avri Altman]

> 
> During CQE error recovery, error-free data commands get requeued if there
> is any data left to transfer, but non-data commands are completed even
> though they have not been processed.  Requeue them instead.
> 
> Note the only non-data command is cache flush, which would have resulted
> in a cache flush being lost if it was queued at the time of CQE recovery.
> 
> Fixes: 1e8e55b67030 ("mmc: block: Add CQE support")
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Reviewed-by: Avri Altman <avri.altman@xxxxxxx>

> ---
>  drivers/mmc/core/block.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c index
> 3a8f27c3e310..4a32b756b7d8 100644
> --- a/drivers/mmc/core/block.c
> +++ b/drivers/mmc/core/block.c
> @@ -1482,6 +1482,8 @@ static void mmc_blk_cqe_complete_rq(struct
> mmc_queue *mq, struct request *req)
>                         blk_mq_requeue_request(req, true);
>                 else
>                         __blk_mq_end_request(req, BLK_STS_OK);
> +       } else if (mq->in_recovery) {
> +               blk_mq_requeue_request(req, true);
>         } else {
>                 blk_mq_end_request(req, BLK_STS_OK);
>         }
> --
> 2.34.1