Btrfs: unlock extent and pages on error in cow_file_range

When I converted the BUG_ON() for the free_space_cache_inode in cow_file_range I
made it so we just return an error instead of unlocking all of our various
stuff.  This is a mistake and causes us to hang when we run into this.  This
patch fixes this problem.  Thanks,

Signed-off-by: Josef Bacik <jbacik@fb.com>

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index a7e6690..5b89250 100644 (file)
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -864,7 +864,8 @@ static noinline int cow_file_range(struct inode *inode,
 
        if (btrfs_is_free_space_inode(inode)) {
                WARN_ON_ONCE(1);
-               return -EINVAL;
+               ret = -EINVAL;
+               goto out_unlock;
        }
 
        num_bytes = ALIGN(end - start + 1, blocksize);