summaryrefslogtreecommitdiff
path: root/fs/ceph/caps.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/ceph/caps.c')
-rw-r--r--fs/ceph/caps.c14
1 files changed, 13 insertions, 1 deletions
diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c
index b2695919435e..af563d73d252 100644
--- a/fs/ceph/caps.c
+++ b/fs/ceph/caps.c
@@ -2013,12 +2013,24 @@ ack:
if (mutex_trylock(&session->s_mutex) == 0) {
dout("inverting session/ino locks on %p\n",
session);
+ session = ceph_get_mds_session(session);
spin_unlock(&ci->i_ceph_lock);
if (took_snap_rwsem) {
up_read(&mdsc->snap_rwsem);
took_snap_rwsem = 0;
}
- mutex_lock(&session->s_mutex);
+ if (session) {
+ mutex_lock(&session->s_mutex);
+ ceph_put_mds_session(session);
+ } else {
+ /*
+ * Because we take the reference while
+ * holding the i_ceph_lock, it should
+ * never be NULL. Throw a warning if it
+ * ever is.
+ */
+ WARN_ON_ONCE(true);
+ }
goto retry;
}
}