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-rw-r--r--fs/ceph/mds_client.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index fd5585b8d382..0a2eb32ffe43 100644
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -2892,7 +2892,8 @@ static void send_mds_reconnect(struct ceph_mds_client *mdsc,
spin_unlock(&session->s_cap_lock);
/* trim unused caps to reduce MDS's cache rejoin time */
- shrink_dcache_parent(mdsc->fsc->sb->s_root);
+ if (mdsc->fsc->sb->s_root)
+ shrink_dcache_parent(mdsc->fsc->sb->s_root);
ceph_con_close(&session->s_con);
ceph_con_open(&session->s_con,