Re: [PATCH] block: Keep RPM_ACTIVE in blk_pre_runtime_resume() when already active

[Bart Van Assche <bvanassche@acm.org>]

On 10/29/26 12:08 AM, Stanley Jhu wrote:
> @@ -153,7 +154,9 @@ void blk_pre_runtime_resume(struct request_queue *q)
>   		return;
>   
>   	spin_lock_irq(&q->queue_lock);
> -	q->rpm_status = RPM_RESUMING;
> +	/* Keep RPM_ACTIVE if a prior failed resume reactivated the queue. */
> +	if (q->rpm_status != RPM_ACTIVE)
> +		q->rpm_status = RPM_RESUMING;
>   	spin_unlock_irq(&q->queue_lock);
>   }
>   EXPORT_SYMBOL(blk_pre_runtime_resume);


Stanley, the analysis looks right to me. Could you make the invariant 
explicit? Only move SUSPENDED -> RESUMING in blk_pre_runtime_resume(), 
and only call blk_clear_pm_only() in blk_post_runtime_resume() if 
old_status == RPM_RESUMING. Please also describe in the commit message 
how this was tested. With those changes:

Reviewed-by: Bart Van Assche bvanassche@acm.org

Separately: since commit eef1d74bf88f, ufshcd_recover_pm_error() no 
longer sees power.runtime_error after a resume failure. Its handling of 
that case is probably dead code now.

Thanks,

Bart.