[PATCH 4.9 39/78] xfs: fix a missing unlock on error in xfs_fs_map_blocks

[Greg Kroah-Hartman]

From: Christoph Hellwig <h...@lst.de>

[ Upstream commit 2bd3fa793aaa7e98b74e3653fdcc72fa753913b5 ]

We also need to drop the iolock when invalidate_inode_pages2 fails, not
only on all other error or successful cases.

Fixes: 527851124d10 ("xfs: implement pNFS export operations")
Signed-off-by: Christoph Hellwig <h...@lst.de>
Reviewed-by: Darrick J. Wong <darrick.w...@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.w...@oracle.com>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
 fs/xfs/xfs_pnfs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/xfs/xfs_pnfs.c b/fs/xfs/xfs_pnfs.c
index cecd37569ddb3..353bfe9c5cdd9 100644
--- a/fs/xfs/xfs_pnfs.c
+++ b/fs/xfs/xfs_pnfs.c
@@ -144,7 +144,7 @@ xfs_fs_map_blocks(
                goto out_unlock;
        error = invalidate_inode_pages2(inode->i_mapping);
        if (WARN_ON_ONCE(error))
-               return error;
+               goto out_unlock;
 
        end_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)offset + length);
        offset_fsb = XFS_B_TO_FSBT(mp, offset);
-- 
2.27.0