RDMA/cxgb4: Abort connections that receive unexpected streaming mode data

This error means the RDMA connection was knocked out of RDMA mode,
probably due to an error on the connection.

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

1 files changed, 10 insertions, 9 deletions

diff --git a/drivers/infiniband/hw/cxgb4/cm.c b/drivers/infiniband/hw/cxgb4/cm.c
index c13745cde7fa..9cab6a6eb96a 100644
--- a/drivers/infiniband/hw/cxgb4/cm.c
+++ b/drivers/infiniband/hw/cxgb4/cm.c
@@ -1391,30 +1391,31 @@ static int rx_data(struct c4iw_dev *dev, struct sk_buff *skb)
         skb_pull(skb, sizeof(*hdr));
         skb_trim(skb, dlen);
 
-        ep->rcv_seq += dlen;
-        BUG_ON(ep->rcv_seq != (ntohl(hdr->seq) + dlen));
-
         /* update RX credits */
         update_rx_credits(ep, dlen);
 
         switch (state_read(&ep->com)) {
         case MPA_REQ_SENT:
+                ep->rcv_seq += dlen;
                 process_mpa_reply(ep, skb);
                 break;
         case MPA_REQ_WAIT:
+                ep->rcv_seq += dlen;
                 process_mpa_request(ep, skb);
                 break;
-        case MPA_REP_SENT:
-                break;
         default:
                 pr_err("%s Unexpected streaming data." \
                        " ep %p state %d tid %u status %d\n",
                        __func__, ep, state_read(&ep->com), ep->hwtid, status);
 
-                /*
-                 * The ep will timeout and inform the ULP of the failure.
-                 * See ep_timeout().
-                 */
+                if (ep->com.qp) {
+                        struct c4iw_qp_attributes attrs;
+
+                        attrs.next_state = C4IW_QP_STATE_ERROR;
+                        c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
+                                       C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
+                }
+                c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
                 break;
         }
         return 0;