Re: [PATCH V2 3/6] mmc: block: Be sure to wait while busy in CQE error recovery

[Christian Loehle <christian.loehle@arm.com>]

On 03/11/2023 08:47, Adrian Hunter wrote:
> STOP command does not guarantee to wait while busy, but subsequent command
> MMC_CMDQ_TASK_MGMT to discard the queue will fail if the card is busy, so
> be sure to wait by employing mmc_poll_for_busy().
> 
> Fixes: 72a5af554df8 ("mmc: core: Add support for handling CQE requests")
> Cc: stable@vger.kernel.org
> Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Christian Loehle <christian.loehle@arm.com>
> ---
>  drivers/mmc/core/core.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
> index 3d3e0ca52614..befde2bd26d3 100644
> --- a/drivers/mmc/core/core.c
> +++ b/drivers/mmc/core/core.c
> @@ -553,6 +553,8 @@ int mmc_cqe_recovery(struct mmc_host *host)
>  	cmd.busy_timeout = MMC_CQE_RECOVERY_TIMEOUT;
>  	mmc_wait_for_cmd(host, &cmd, 0);
>  
> +	mmc_poll_for_busy(host->card, MMC_CQE_RECOVERY_TIMEOUT, true, MMC_BUSY_IO);
> +
>  	memset(&cmd, 0, sizeof(cmd));
>  	cmd.opcode       = MMC_CMDQ_TASK_MGMT;
>  	cmd.arg          = 1; /* Discard entire queue */