Re: [PATCH 5/5] blk-mq: Rework blk-mq timeout handling again

[Keith Busch <keith.busch@xxxxxxxxx>]

On Fri, Jul 27, 2018 at 04:59:34PM +0000, Bart Van Assche wrote:
> On Fri, 2018-07-27 at 10:57 -0600, Keith Busch wrote:
> > You skip that code if the driver returns BLK_EH_DONT_RESET_TIMER.
> 
> How about applying the following patch on top of this series?

That works for me if you, but it breaks scsi again when
scmd_eh_abort_handler completes the command a second time.

 
> diff --git a/block/blk-mq.c b/block/blk-mq.c
> index a97ab5ba9d18..aa66535604fd 100644
> --- a/block/blk-mq.c
> +++ b/block/blk-mq.c
> @@ -854,10 +854,10 @@ static void blk_mq_rq_timed_out(struct request *req, bool reserved)
>  	 * latter case, if blk_mq_complete_request() was called while
>  	 * the timeout handler was in progress, ignore that call.
>  	 */
> -	if (ret == BLK_EH_DONT_RESET_TIMER)
> -		return;
> -	WARN_ON_ONCE(ret != BLK_EH_RESET_TIMER);
> -	blk_mq_add_timer(req);
> +	if (ret == BLK_EH_RESET_TIMER)
> +		blk_mq_add_timer(req);
> +	else
> +		WARN_ON_ONCE(ret != BLK_EH_DONT_RESET_TIMER);
>  again:
>  	if (blk_mq_change_rq_state(req, MQ_RQ_TIMED_OUT, MQ_RQ_IN_FLIGHT))
>  		return;
> 
> Bart.