RDMA/cxgb4: Set arp error handler for PASS_ACCEPT_RPL messages

accept_cr() failed to set the arp error handler on a reused skb.  This
results in a kernel crash if the arp does indeed time out.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Vipul Pandya <vipul@chelsio.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/cxgb4/cm.c b/drivers/infiniband/hw/cxgb4/cm.c
index 8865a3332a62..12fef76c791c 100644
--- a/drivers/infiniband/hw/cxgb4/cm.c
+++ b/drivers/infiniband/hw/cxgb4/cm.c
@@ -332,6 +332,7 @@ static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp)
         } else {
                 skb = alloc_skb(len, gfp);
         }
+        t4_set_arp_err_handler(skb, NULL, NULL);
         return skb;
 }
 
@@ -2025,6 +2026,7 @@ static void accept_cr(struct c4iw_ep *ep, struct sk_buff *skb,
         rpl->opt0 = cpu_to_be64(opt0);
         rpl->opt2 = cpu_to_be32(opt2);
         set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
+        t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
         c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
 
         return;