[PATCH] btrfs: don't get an EINTR during drop_snapshot for reloc

[Josef Bacik <josef@toxicpanda.com>]

This was partially fixed by f3e3d9cc35252, however it missed a spot when
we restart a trans handle because we need to end the transaction.  The
fix is the same, simply use btrfs_join_transaction() instead of
btrfs_start_transaction() when deleting reloc roots.

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
---
 fs/btrfs/extent-tree.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index d79b8369e6aa..08c664d04824 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -5549,7 +5549,10 @@ int btrfs_drop_snapshot(struct btrfs_root *root, int update_ref, int for_reloc)
 				goto out_free;
 			}
 
-			trans = btrfs_start_transaction(tree_root, 0);
+			if (for_reloc)
+				trans = btrfs_join_transaction(tree_root);
+			else
+				trans = btrfs_start_transaction(tree_root, 0);
 			if (IS_ERR(trans)) {
 				err = PTR_ERR(trans);
 				goto out_free;
-- 
2.26.2