kernel: skip GRO for packets bridged to other hosts

Eliminates excessive skb copying when bridging from LAN to WLAN on
ramips.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 44797

target/linux/generic/patches-3.18/680-net-skip-gro-for-otherhost-packets.patch

@@ -0,0 +1,12 @@
+--- a/net/core/dev.c
++++ b/net/core/dev.c
+@@ -4003,6 +4003,9 @@ static enum gro_result dev_gro_receive(s
+ 	enum gro_result ret;
+ 	int grow;
+ 
++	if (skb->pkt_type == PACKET_OTHERHOST)
++		goto normal;
++
+ 	if (!(skb->dev->features & NETIF_F_GRO))
+ 		goto normal;
+ 

target/linux/generic/patches-3.19/680-net-skip-gro-for-otherhost-packets.patch

@@ -0,0 +1,12 @@
+--- a/net/core/dev.c
++++ b/net/core/dev.c
+@@ -3967,6 +3967,9 @@ static enum gro_result dev_gro_receive(s
+ 	enum gro_result ret;
+ 	int grow;
+ 
++	if (skb->pkt_type == PACKET_OTHERHOST)
++		goto normal;
++
+ 	if (!(skb->dev->features & NETIF_F_GRO))
+ 		goto normal;
+ 

target/linux/generic/patches-4.0/680-net-skip-gro-for-otherhost-packets.patch

@@ -0,0 +1,12 @@
+--- a/net/core/dev.c
++++ b/net/core/dev.c
+@@ -4005,6 +4005,9 @@ static enum gro_result dev_gro_receive(s
+ 	enum gro_result ret;
+ 	int grow;
+ 
++	if (skb->pkt_type == PACKET_OTHERHOST)
++		goto normal;
++
+ 	if (!(skb->dev->features & NETIF_F_GRO))
+ 		goto normal;
+