[PATCH v1 6/7] net: mvneta: Don't use GRO on Armada 3720

[Marek Behún]

For some reason on Armada 3720 boards (EspressoBin and Turris Mox) the
networking driver behaves weirdly when using napi_gro_receive.

For example downloading a big file from a local network (low ping) is
fast, but when downloading from a remote server (higher ping), the
download speed is at first high but drops rapidly to almost nothing or
absolutely nothing.

This is fixed when using netif_receive_skb instead of napi_gro_receive.

Signed-off-by: Marek Behun <marek.be...@nic.cz>
Cc: Russell King - ARM Linux <li...@armlinux.org.uk>
Cc: netdev@vger.kernel.org

diff --git a/drivers/net/ethernet/marvell/mvneta.c 
b/drivers/net/ethernet/marvell/mvneta.c
index 0ad2f3f7da85..27f3017d94c5 100644
--- a/drivers/net/ethernet/marvell/mvneta.c
+++ b/drivers/net/ethernet/marvell/mvneta.c
@@ -1959,7 +1959,10 @@ static int mvneta_rx_swbm(struct mvneta_port *pp, int 
rx_todo,
 
                        skb->protocol = eth_type_trans(skb, dev);
                        mvneta_rx_csum(pp, rx_status, skb);
-                       napi_gro_receive(&port->napi, skb);
+                       if (pp->neta_armada3700)
+                               netif_receive_skb(skb);
+                       else
+                               napi_gro_receive(&port->napi, skb);
 
                        rcvd_pkts++;
                        rcvd_bytes += rx_bytes;
@@ -2001,7 +2004,10 @@ static int mvneta_rx_swbm(struct mvneta_port *pp, int 
rx_todo,
 
                mvneta_rx_csum(pp, rx_status, skb);
 
-               napi_gro_receive(&port->napi, skb);
+               if (pp->neta_armada3700)
+                       netif_receive_skb(skb);
+               else
+                       napi_gro_receive(&port->napi, skb);
        }
 
        if (rcvd_pkts) {
-- 
2.16.4