diff options
| -rw-r--r-- | fs/btrfs/volumes.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index db79fb7e7e91..92e586bc8004 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -1681,16 +1681,17 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path) filemap_write_and_wait(bdev->bd_inode->i_mapping); devices = &root->fs_info->fs_devices->devices; - /* - * we have the volume lock, so we don't need the extra - * device list mutex while reading the list here. - */ + + mutex_lock(&root->fs_info->fs_devices->device_list_mutex); list_for_each_entry(device, devices, dev_list) { if (device->bdev == bdev) { ret = -EEXIST; + mutex_unlock( + &root->fs_info->fs_devices->device_list_mutex); goto error; } } + mutex_unlock(&root->fs_info->fs_devices->device_list_mutex); device = kzalloc(sizeof(*device), GFP_NOFS); if (!device) { |