ceph: avoid useless ceph_get_dentry_parent_inode() in ceph_rename()

This is just old_dir; no reason to abuse the dcache pointers.

Reported-by: Al Viro <viro.zeniv.linux.org.uk>
Signed-off-by: Sage Weil <sage@inktank.com>
Reviewed-by: Yan, Zheng <zheng.z.yan@intel.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index e9918a0306d1..e07973718ebe 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -911,10 +911,11 @@ static int ceph_rename(struct inode *old_dir, struct dentry *old_dentry,
         req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_RENAME, USE_AUTH_MDS);
         if (IS_ERR(req))
                 return PTR_ERR(req);
+        ihold(old_dir);
         req->r_dentry = dget(new_dentry);
         req->r_num_caps = 2;
         req->r_old_dentry = dget(old_dentry);
-        req->r_old_dentry_dir = ceph_get_dentry_parent_inode(old_dentry);
+        req->r_old_dentry_dir = old_dir;
         req->r_locked_dir = new_dir;
         req->r_old_dentry_drop = CEPH_CAP_FILE_SHARED;
         req->r_old_dentry_unless = CEPH_CAP_FILE_EXCL;