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authorChristoph Hellwig <hch@lst.de>2020-04-14 09:28:54 +0200
committerJens Axboe <axboe@kernel.dk>2020-04-20 11:32:59 -0600
commitcddae808aeb77e5c29d22a8e0dfbdaed413f9e04 (patch)
treecca16ea68b8e11226b5def4cac2d49f5e565af70 /block/partitions
parentfa9156ae597c244df4e12891dc8329f649970d9a (diff)
block: pass a hd_struct to delete_partition
All callers have the hd_struct at hand, so pass it instead of performing another lookup. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/partitions')
-rw-r--r--block/partitions/core.c22
1 files changed, 8 insertions, 14 deletions
diff --git a/block/partitions/core.c b/block/partitions/core.c
index 7e2f40875166..6dc534b502a9 100644
--- a/block/partitions/core.c
+++ b/block/partitions/core.c
@@ -296,20 +296,12 @@ void __delete_partition(struct percpu_ref *ref)
* Must be called either with bd_mutex held, before a disk can be opened or
* after all disk users are gone.
*/
-void delete_partition(struct gendisk *disk, int partno)
+void delete_partition(struct gendisk *disk, struct hd_struct *part)
{
struct disk_part_tbl *ptbl =
rcu_dereference_protected(disk->part_tbl, 1);
- struct hd_struct *part;
-
- if (partno >= ptbl->len)
- return;
- part = rcu_dereference_protected(ptbl->part[partno], 1);
- if (!part)
- return;
-
- rcu_assign_pointer(ptbl->part[partno], NULL);
+ rcu_assign_pointer(ptbl->part[part->partno], NULL);
rcu_assign_pointer(ptbl->last_lookup, NULL);
kobject_put(part->holder_dir);
device_del(part_to_dev(part));
@@ -520,10 +512,10 @@ int bdev_del_partition(struct block_device *bdev, int partno)
if (!part)
return -ENXIO;
+ ret = -ENOMEM;
bdevp = bdget(part_devt(part));
- disk_put_part(part);
if (!bdevp)
- return -ENOMEM;
+ goto out_put_part;
mutex_lock(&bdevp->bd_mutex);
@@ -535,13 +527,15 @@ int bdev_del_partition(struct block_device *bdev, int partno)
invalidate_bdev(bdevp);
mutex_lock_nested(&bdev->bd_mutex, 1);
- delete_partition(bdev->bd_disk, partno);
+ delete_partition(bdev->bd_disk, part);
mutex_unlock(&bdev->bd_mutex);
ret = 0;
out_unlock:
mutex_unlock(&bdevp->bd_mutex);
bdput(bdevp);
+out_put_part:
+ disk_put_part(part);
return ret;
}
@@ -617,7 +611,7 @@ int blk_drop_partitions(struct gendisk *disk, struct block_device *bdev)
disk_part_iter_init(&piter, disk, DISK_PITER_INCL_EMPTY);
while ((part = disk_part_iter_next(&piter)))
- delete_partition(disk, part->partno);
+ delete_partition(disk, part);
disk_part_iter_exit(&piter);
return 0;