btrfs: add missing unlocks to transaction abort paths

Added in commit 49b25e0540904be0bf558b84475c69d72e4de66e
("btrfs: enhance transaction abort infrastructure")

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index 11b77a5..3642225 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -73,8 +73,10 @@
 
 	cur_trans = root->fs_info->running_transaction;
 	if (cur_trans) {
-		if (cur_trans->aborted)
+		if (cur_trans->aborted) {
+			spin_unlock(&root->fs_info->trans_lock);
 			return cur_trans->aborted;
+		}
 		atomic_inc(&cur_trans->use_count);
 		atomic_inc(&cur_trans->num_writers);
 		cur_trans->num_joined++;
@@ -1400,6 +1402,7 @@
 	ret = commit_fs_roots(trans, root);
 	if (ret) {
 		mutex_unlock(&root->fs_info->tree_log_mutex);
+		mutex_unlock(&root->fs_info->reloc_mutex);
 		goto cleanup_transaction;
 	}
 
@@ -1411,6 +1414,7 @@
 	ret = commit_cowonly_roots(trans, root);
 	if (ret) {
 		mutex_unlock(&root->fs_info->tree_log_mutex);
+		mutex_unlock(&root->fs_info->reloc_mutex);
 		goto cleanup_transaction;
 	}