diff options
| author | Christoph Hellwig <hch@lst.de> | 2022-11-15 22:10:48 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-11-16 15:19:56 -0700 |
| commit | 7b5865831c1003122f737df5e16adaa583f1a595 (patch) | |
| tree | 03bd01348e6c4cf32ce675ea24fbb84d2e877a2a /drivers/md | |
| parent | b9a785d2dc6567b2fd9fc60057a6a945a276927a (diff) | |
| download | linux-7b5865831c1003122f737df5e16adaa583f1a595.tar.bz2 | |
dm: cleanup close_table_device
Take the list unlink and free into close_table_device so that no half
torn down table_devices exist. Also remove the check for a NULL bdev
as that can't happen - open_table_device never adds a table_device to
the list that does not have a valid block_device.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Reviewed-by: Mike Snitzer <snitzer@kernel.org>
Link: https://lore.kernel.org/r/20221115141054.1051801-5-yukuai1@huaweicloud.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/dm.c | 12 |
1 files changed, 3 insertions, 9 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 28d7581b6a82..2917700b1e15 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -774,14 +774,11 @@ out_free_td: */ static void close_table_device(struct table_device *td, struct mapped_device *md) { - if (!td->dm_dev.bdev) - return; - bd_unlink_disk_holder(td->dm_dev.bdev, dm_disk(md)); blkdev_put(td->dm_dev.bdev, td->dm_dev.mode | FMODE_EXCL); put_dax(td->dm_dev.dax_dev); - td->dm_dev.bdev = NULL; - td->dm_dev.dax_dev = NULL; + list_del(&td->list); + kfree(td); } static struct table_device *find_table_device(struct list_head *l, dev_t dev, @@ -823,11 +820,8 @@ void dm_put_table_device(struct mapped_device *md, struct dm_dev *d) struct table_device *td = container_of(d, struct table_device, dm_dev); mutex_lock(&md->table_devices_lock); - if (refcount_dec_and_test(&td->count)) { + if (refcount_dec_and_test(&td->count)) close_table_device(td, md); - list_del(&td->list); - kfree(td); - } mutex_unlock(&md->table_devices_lock); } |