RDMA/iw_cxgb4: Do not stop timer in case of incomplete messages

In case of incomplete mpa messages we should not stop timer as it
results in return with timeout for the next mpa message

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/hw/cxgb4/cm.c

@@ -1395,21 +1395,13 @@ static int process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb)
 
 	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
 
-	/*
-	 * Stop mpa timer.  If it expired, then
-	 * we ignore the MPA reply.  process_timeout()
-	 * will abort the connection.
-	 */
-	if (stop_ep_timer(ep))
-		return 0;
-
 	/*
 	 * If we get more than the supported amount of private data
 	 * then we must fail this connection.
 	 */
 	if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
 		err = -EINVAL;
-		goto err;
+		goto err_stop_timer;
 	}
 
 	/*
@@ -1431,11 +1423,11 @@ static int process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb)
 		printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d,"
 		       " Received = %d\n", __func__, mpa_rev, mpa->revision);
 		err = -EPROTO;
-		goto err;
+		goto err_stop_timer;
 	}
 	if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) {
 		err = -EPROTO;
-		goto err;
+		goto err_stop_timer;
 	}
 
 	plen = ntohs(mpa->private_data_size);
@@ -1445,15 +1437,15 @@ static int process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb)
 	 */
 	if (plen > MPA_MAX_PRIVATE_DATA) {
 		err = -EPROTO;
-		goto err;
+		goto err_stop_timer;
 	}
 
 	/*
 	 * If plen does not account for pkt size
 	 */
 	if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
 		err = -EPROTO;
-		goto err;
+		goto err_stop_timer;
 	}
 
 	ep->plen = (u8) plen;
@@ -1467,9 +1459,17 @@ static int process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb)
 
 	if (mpa->flags & MPA_REJECT) {
 		err = -ECONNREFUSED;
-		goto err;
+		goto err_stop_timer;
 	}
 
+	/*
+	 * Stop mpa timer.  If it expired, then
+	 * we ignore the MPA reply.  process_timeout()
+	 * will abort the connection.
+	 */
+	if (stop_ep_timer(ep))
+		return 0;
+
 	/*
 	 * If we get here we have accumulated the entire mpa
 	 * start reply message including private data. And
@@ -1609,6 +1609,8 @@ static int process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb)
 		goto out;
 	}
 	goto out;
+err_stop_timer:
+	stop_ep_timer(ep);
 err:
 	disconnect = 2;
 out: