[PATCH] xfs: Add the missed xfs_perag_put() for xfs_ifree_cluster()

[Chuhong Yuan]

xfs_ifree_cluster() calls xfs_perag_get() at the beginning, but forgets to
call xfs_perag_put() in one failed path.
Add the missed function call to fix it.

Fixes: ce92464c180b ("xfs: make xfs_trans_get_buf return an error code")
Signed-off-by: Chuhong Yuan <hsleste...@gmail.com>
---
 fs/xfs/xfs_inode.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index d1772786af29..8845faa8161a 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -2639,8 +2639,10 @@ xfs_ifree_cluster(
                error = xfs_trans_get_buf(tp, mp->m_ddev_targp, blkno,
                                mp->m_bsize * igeo->blocks_per_cluster,
                                XBF_UNMAPPED, &bp);
-               if (error)
+               if (error) {
+                       xfs_perag_put(pag);
                        return error;
+               }
 
                /*
                 * This buffer may not have been correctly initialised as we
-- 
2.26.2