Re: [PATCH 4/6] ide: don't acquire queue lock in ide_pm_execute_rq

[Omar Sandoval <osandov@osandov.com>]

On Fri, Nov 16, 2018 at 09:10:04AM +0100, Christoph Hellwig wrote:
> There is nothing we can synchronize against over a call to
> blk_queue_dying.

Reviewed-by: Omar Sandoval <osandov@fb.com>

> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>  drivers/ide/ide-pm.c | 3 ---
>  1 file changed, 3 deletions(-)
> 
> diff --git a/drivers/ide/ide-pm.c b/drivers/ide/ide-pm.c
> index 51fe10ac02fa..56690f523100 100644
> --- a/drivers/ide/ide-pm.c
> +++ b/drivers/ide/ide-pm.c
> @@ -44,15 +44,12 @@ static int ide_pm_execute_rq(struct request *rq)
>  {
>  	struct request_queue *q = rq->q;
>  
> -	spin_lock_irq(&q->queue_lock);
>  	if (unlikely(blk_queue_dying(q))) {
>  		rq->rq_flags |= RQF_QUIET;
>  		scsi_req(rq)->result = -ENXIO;
> -		spin_unlock_irq(&q->queue_lock);
>  		blk_mq_end_request(rq, BLK_STS_OK);
>  		return -ENXIO;
>  	}
> -	spin_unlock_irq(&q->queue_lock);
>  	blk_execute_rq(q, NULL, rq, true);
>  
>  	return scsi_req(rq)->result ? -EIO : 0;
> -- 
> 2.19.1
>