ceph: propagate mds session allocation failures to caller

Return error to original caller if register_session() fails.

Signed-off-by: Sage Weil <sage@newdream.net>

1 files changed, 6 insertions, 1 deletions

diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index 5cbf46abfee3..b6b5348055fc 100644
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -1567,8 +1567,13 @@ static int __do_request(struct ceph_mds_client *mdsc,
 
         /* get, open session */
         session = __ceph_lookup_mds_session(mdsc, mds);
-        if (!session)
+        if (!session) {
                 session = register_session(mdsc, mds);
+                if (IS_ERR(session)) {
+                        err = PTR_ERR(session);
+                        goto finish;
+                }
+        }
         dout("do_request mds%d session %p state %s\n", mds, session,
              session_state_name(session->s_state));
         if (session->s_state != CEPH_MDS_SESSION_OPEN &&