Commit 29306626 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Martin K. Petersen
Browse files

scsi: block: Add a helper to cancel atomic queue limit updates 



Drivers might have to perform complex actions to determine queue limits,
and those might fail.  Add a helper to cancel a queue limit update that can
be called in those cases.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20240409143748.980206-2-hch@lst.de


Reviewed-by: default avatarKanchan Joshi <joshi.k@samsung.com>
Reviewed-by: default avatarDamien Le Moal <dlemoal@kernel.org>
Reviewed-by: default avatarHannes Reinecke <hare@suse.de>
Reviewed-by: default avatarJohn Garry <john.g.garry@oracle.com>
Reviewed-by: default avatarJohannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent 28fc2bd2

include/linux/blkdev.h

+13 −0
Original line number Diff line number Diff line
@@ -892,6 +892,19 @@ int queue_limits_commit_update(struct request_queue *q, 
		struct queue_limits *lim);

int queue_limits_set(struct request_queue *q, struct queue_limits *lim);



/**

 * queue_limits_cancel_update - cancel an atomic update of queue limits

 * @q:		queue to update

 *

 * This functions cancels an atomic update of the queue limits started by

 * queue_limits_start_update() and should be used when an error occurs after

 * starting update.

 */

static inline void queue_limits_cancel_update(struct request_queue *q)

{

	mutex_unlock(&q->limits_lock);

}



/*

 * Access functions for manipulating queue properties

 */