cxgb4i: Handle dst_get_neighbour_noref() returning NULL.

Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Roland Dreier <roland@purestorage.com>

1 files changed, 7 insertions, 1 deletions

diff --git a/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c b/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c
index c8fd13aadf9c..5a4a3bfc60cf 100644
--- a/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c
+++ b/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c
@@ -1127,6 +1127,7 @@ static int init_act_open(struct cxgbi_sock *csk)
         struct net_device *ndev = cdev->ports[csk->port_id];
         struct port_info *pi = netdev_priv(ndev);
         struct sk_buff *skb = NULL;
+        struct neighbour *n;
         unsigned int step;
 
         log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
@@ -1141,7 +1142,12 @@ static int init_act_open(struct cxgbi_sock *csk)
         cxgbi_sock_set_flag(csk, CTPF_HAS_ATID);
         cxgbi_sock_get(csk);
 
-        csk->l2t = cxgb4_l2t_get(lldi->l2t, dst_get_neighbour_noref(csk->dst), ndev, 0);
+        n = dst_get_neighbour_noref(csk->dst);
+        if (!n) {
+                pr_err("%s, can't get neighbour of csk->dst.\n", ndev->name);
+                goto rel_resource;
+        }
+        csk->l2t = cxgb4_l2t_get(lldi->l2t, n, ndev, 0);
         if (!csk->l2t) {
                 pr_err("%s, cannot alloc l2t.\n", ndev->name);
                 goto rel_resource;