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btrfs: move btrfs_rm_dev_replace_free_srcdev outside of all locks

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When closing and freeing the source device we could end up doing our
final blkdev_put() on the bdev, which will grab the bd_mutex.  As such
we want to be holding as few locks as possible, so move this call
outside of the dev_replace->lock_finishing_cancel_unmount lock.  Since
we're modifying the fs_devices we need to make sure we're holding the
uuid_mutex here, so take that as well.

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Josef Bacik 2020-08-20 11:18:27 -04:00 committed by David Sterba
parent 68abf36016
commit 62cf539120
1 changed files with 0 additions and 1 deletions
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fs/btrfs/volumes.c
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@ -2216,7 +2216,6 @@ void btrfs_rm_dev_replace_remove_srcdev(struct btrfs_device *srcdev)
void btrfs_rm_dev_replace_free_srcdev(struct btrfs_device *srcdev)
{
struct btrfs_fs_info *fs_info = srcdev->fs_info;
struct btrfs_fs_devices *fs_devices = srcdev->fs_devices;
mutex_lock(&uuid_mutex);