This is a preparatory cleanup that will make clear that the only successful way out of btrfs_init_dev_replace_tgtdev will also set the device_out to a valid pointer. With this guarantee, the callers can be simplified. Reviewed-by: Anand Jain <anand.jain@xxxxxxxxxx> Signed-off-by: David Sterba <dsterba@xxxxxxxx> --- fs/btrfs/dev-replace.c | 1 - fs/btrfs/volumes.c | 8 +++++++- 2 files changed, 7 insertions(+), 2 deletions(-) diff --git a/fs/btrfs/dev-replace.c b/fs/btrfs/dev-replace.c index c0397cd2a3ba..e3b8a79c1665 100644 --- a/fs/btrfs/dev-replace.c +++ b/fs/btrfs/dev-replace.c @@ -370,7 +370,6 @@ int btrfs_dev_replace_start(struct btrfs_fs_info *fs_info, dev_replace->cont_reading_from_srcdev_mode = read_src; WARN_ON(!src_device); dev_replace->srcdev = src_device; - WARN_ON(!tgt_device); dev_replace->tgtdev = tgt_device; btrfs_info_in_rcu(fs_info, diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 93f8f17cacca..8086c5687b72 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -2592,6 +2592,12 @@ int btrfs_init_new_device(struct btrfs_fs_info *fs_info, const char *device_path return ret; } +/* + * Initialize a new device for device replace target from a given source dev + * and path. + * + * Return 0 and new device in @device_out, otherwise return < 0 + */ int btrfs_init_dev_replace_tgtdev(struct btrfs_fs_info *fs_info, const char *device_path, struct btrfs_device *srcdev, @@ -2678,7 +2684,7 @@ int btrfs_init_dev_replace_tgtdev(struct btrfs_fs_info *fs_info, mutex_unlock(&fs_info->fs_devices->device_list_mutex); *device_out = device; - return ret; + return 0; error: blkdev_put(bdev, FMODE_EXCL); -- 2.16.2 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
