ceph: handle kzalloc() failure

Signed-off-by: Cheng Renquan <crquan@gmail.com>
Signed-off-by: Sage Weil <sage@newdream.net>

diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index ccb4141e306fec9ed015555c6e48ec1d1a9679ff..d549ab3adfda3bfe91af0558ed790c836789a445 100644 (file)
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -2631,6 +2631,9 @@ int ceph_mdsc_init(struct ceph_mds_client *mdsc, struct ceph_client *client)
        mdsc->client = client;
        mutex_init(&mdsc->mutex);
        mdsc->mdsmap = kzalloc(sizeof(*mdsc->mdsmap), GFP_NOFS);
+       if (mdsc->mdsmap == NULL)
+               return -ENOMEM;
+
        init_completion(&mdsc->safe_umount_waiters);
        init_completion(&mdsc->session_close_waiters);
        INIT_LIST_HEAD(&mdsc->waiting_for_map);
@@ -2656,6 +2659,7 @@ int ceph_mdsc_init(struct ceph_mds_client *mdsc, struct ceph_client *client)
        init_waitqueue_head(&mdsc->cap_flushing_wq);
        spin_lock_init(&mdsc->dentry_lru_lock);
        INIT_LIST_HEAD(&mdsc->dentry_lru);
+
        return 0;
 }