[SCSI] net: reclaim 8 upper bits of the netdev->features from GSO

Reclaim 8 upper bits of netdev->features from GSO.

Signed-off-by: Chris Leech <christopher.leech@intel.com>
Signed-off-by: Yi Zou <yi.zou@intel.com>
Acked-by: David Miller <davem@davemloft.net>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

drivers/net/xen-netfront.c

@@ -1511,7 +1511,7 @@ static int xennet_set_tso(struct net_device *dev, u32 data)
 static void xennet_set_features(struct net_device *dev)
 {
 	/* Turn off all GSO bits except ROBUST. */
-	dev->features &= (1 << NETIF_F_GSO_SHIFT) - 1;
+	dev->features &= ~NETIF_F_GSO_MASK;
 	dev->features |= NETIF_F_GSO_ROBUST;
 	xennet_set_sg(dev, 0);
 

include/linux/netdevice.h

@@ -652,7 +652,7 @@ struct net_device
 
 	/* Segmentation offload features */
 #define NETIF_F_GSO_SHIFT	16
-#define NETIF_F_GSO_MASK	0xffff0000
+#define NETIF_F_GSO_MASK	0x00ff0000
 #define NETIF_F_TSO		(SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
 #define NETIF_F_UFO		(SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
 #define NETIF_F_GSO_ROBUST	(SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)