diff options
Diffstat (limited to 'block')
| -rw-r--r-- | block/blk-zoned.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/block/blk-zoned.c b/block/blk-zoned.c index 6e3ef181e837..7aae3c236cad 100644 --- a/block/blk-zoned.c +++ b/block/blk-zoned.c @@ -1154,13 +1154,17 @@ static void disk_zone_wplug_schedule_bio_work(struct gendisk *disk, lockdep_assert_held(&zwplug->lock); /* - * Take a reference on the zone write plug and schedule the submission - * of the next plugged BIO. blk_zone_wplug_bio_work() will release the - * reference we take here. + * Schedule the submission of the next plugged BIO. Taking a reference + * to the zone write plug is required as the bio_work belongs to the + * plug, and thus we must ensure that the write plug does not go away + * while the work is being scheduled but has not run yet. + * blk_zone_wplug_bio_work() will release the reference we take here, + * and we also drop this reference if the work is already scheduled. */ WARN_ON_ONCE(!(zwplug->flags & BLK_ZONE_WPLUG_PLUGGED)); refcount_inc(&zwplug->ref); - queue_work(disk->zone_wplugs_wq, &zwplug->bio_work); + if (!queue_work(disk->zone_wplugs_wq, &zwplug->bio_work)) + disk_put_zone_wplug(zwplug); } static inline void disk_zone_wplug_add_bio(struct gendisk *disk, |