diff options
| -rw-r--r-- | block/blk-ia-ranges.c | 57 | ||||
| -rw-r--r-- | block/blk-sysfs.c | 2 | ||||
| -rw-r--r-- | block/blk.h | 3 |
3 files changed, 18 insertions, 44 deletions
diff --git a/block/blk-ia-ranges.c b/block/blk-ia-ranges.c index c1bf14bcd15f..2bd1d311033b 100644 --- a/block/blk-ia-ranges.c +++ b/block/blk-ia-ranges.c @@ -102,31 +102,18 @@ static struct kobj_type blk_ia_ranges_ktype = { * disk_register_independent_access_ranges - register with sysfs a set of * independent access ranges * @disk: Target disk - * @new_iars: New set of independent access ranges * * Register with sysfs a set of independent access ranges for @disk. - * If @new_iars is not NULL, this set of ranges is registered and the old set - * specified by disk->ia_ranges is unregistered. Otherwise, disk->ia_ranges is - * registered if it is not already. */ -int disk_register_independent_access_ranges(struct gendisk *disk, - struct blk_independent_access_ranges *new_iars) +int disk_register_independent_access_ranges(struct gendisk *disk) { + struct blk_independent_access_ranges *iars = disk->ia_ranges; struct request_queue *q = disk->queue; - struct blk_independent_access_ranges *iars; int i, ret; lockdep_assert_held(&q->sysfs_dir_lock); lockdep_assert_held(&q->sysfs_lock); - /* If a new range set is specified, unregister the old one */ - if (new_iars) { - if (disk->ia_ranges) - disk_unregister_independent_access_ranges(disk); - disk->ia_ranges = new_iars; - } - - iars = disk->ia_ranges; if (!iars) return 0; @@ -210,6 +197,9 @@ static bool disk_check_ia_ranges(struct gendisk *disk, sector_t sector = 0; int i; + if (WARN_ON_ONCE(!iars->nr_ia_ranges)) + return false; + /* * While sorting the ranges in increasing LBA order, check that the * ranges do not overlap, that there are no sector holes and that all @@ -298,25 +288,15 @@ void disk_set_independent_access_ranges(struct gendisk *disk, { struct request_queue *q = disk->queue; - if (WARN_ON_ONCE(iars && !iars->nr_ia_ranges)) { + mutex_lock(&q->sysfs_dir_lock); + mutex_lock(&q->sysfs_lock); + if (iars && !disk_check_ia_ranges(disk, iars)) { kfree(iars); iars = NULL; } - - mutex_lock(&q->sysfs_dir_lock); - mutex_lock(&q->sysfs_lock); - - if (iars) { - if (!disk_check_ia_ranges(disk, iars)) { - kfree(iars); - iars = NULL; - goto reg; - } - - if (!disk_ia_ranges_changed(disk, iars)) { - kfree(iars); - goto unlock; - } + if (iars && !disk_ia_ranges_changed(disk, iars)) { + kfree(iars); + goto unlock; } /* @@ -324,17 +304,12 @@ void disk_set_independent_access_ranges(struct gendisk *disk, * revalidation. If that is the case, we need to unregister the old * set of independent access ranges and register the new set. If the * queue is not registered, registration of the device request queue - * will register the independent access ranges, so only swap in the - * new set and free the old one. + * will register the independent access ranges. */ -reg: - if (blk_queue_registered(q)) { - disk_register_independent_access_ranges(disk, iars); - } else { - swap(disk->ia_ranges, iars); - kfree(iars); - } - + disk_unregister_independent_access_ranges(disk); + disk->ia_ranges = iars; + if (blk_queue_registered(q)) + disk_register_independent_access_ranges(disk); unlock: mutex_unlock(&q->sysfs_lock); mutex_unlock(&q->sysfs_dir_lock); diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c index 85ea43eff094..58cb9cb9f48c 100644 --- a/block/blk-sysfs.c +++ b/block/blk-sysfs.c @@ -832,7 +832,7 @@ int blk_register_queue(struct gendisk *disk) blk_mq_debugfs_register(q); mutex_unlock(&q->debugfs_mutex); - ret = disk_register_independent_access_ranges(disk, NULL); + ret = disk_register_independent_access_ranges(disk); if (ret) goto put_dev; diff --git a/block/blk.h b/block/blk.h index 74d59435870c..58ad50cacd2d 100644 --- a/block/blk.h +++ b/block/blk.h @@ -459,8 +459,7 @@ long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg); extern const struct address_space_operations def_blk_aops; -int disk_register_independent_access_ranges(struct gendisk *disk, - struct blk_independent_access_ranges *new_iars); +int disk_register_independent_access_ranges(struct gendisk *disk); void disk_unregister_independent_access_ranges(struct gendisk *disk); #ifdef CONFIG_FAIL_MAKE_REQUEST |