qede: Fix single MTU sized packet from firmware GRO flow

In firmware assisted GRO flow there could be a single MTU sized
segment arriving due to firmware aggregation timeout/last segment
in an aggregation flow, which is not expected to be an actual gro
packet. So If a skb has zero frags from the GRO flow then simply
push it in the stack as non gso skb.

Signed-off-by: Manish Chopra <manish.chopra@qlogic.com>
Signed-off-by: Yuval Mintz <yuval.mintz@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/qlogic/qede/qede_main.c b/drivers/net/ethernet/qlogic/qede/qede_main.c
index bf0fb99874c6fee8702e04b8ed93ac0c446d2169..7869465435fa81e9c9ebd9e5ae780b01efb20087 100644 (file)
--- a/drivers/net/ethernet/qlogic/qede/qede_main.c
+++ b/drivers/net/ethernet/qlogic/qede/qede_main.c
@@ -1069,6 +1069,17 @@ static void qede_gro_receive(struct qede_dev *edev,
                             struct sk_buff *skb,
                             u16 vlan_tag)
 {
+       /* FW can send a single MTU sized packet from gro flow
+        * due to aggregation timeout/last segment etc. which
+        * is not expected to be a gro packet. If a skb has zero
+        * frags then simply push it in the stack as non gso skb.
+        */
+       if (unlikely(!skb->data_len)) {
+               skb_shinfo(skb)->gso_type = 0;
+               skb_shinfo(skb)->gso_size = 0;
+               goto send_skb;
+       }
+
 #ifdef CONFIG_INET
        if (skb_shinfo(skb)->gso_size) {
                skb_set_network_header(skb, 0);
@@ -1087,6 +1098,8 @@ static void qede_gro_receive(struct qede_dev *edev,
                }
        }
 #endif
+
+send_skb:
        skb_record_rx_queue(skb, fp->rss_id);
        qede_skb_receive(edev, fp, skb, vlan_tag);
 }