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

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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: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20240409143748.980206-2-hch@lst.de
Reviewed-by: Kanchan Joshi <joshi.k@samsung.com>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Christoph Hellwig 2024-04-09 16:37:26 +02:00 committed by Martin K. Petersen
parent 28fc2bd2c7
commit 293066264f
1 changed files with 13 additions and 0 deletions
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13
include/linux/blkdev.h
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@ -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
*/