sky2: TSO support for EC_U

The Yukon EC_U chipset apparently supports TSO but only for non-Jumbo
frame sizes because it lacks a Ram buffer.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 3 insertions, 4 deletions

diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c
index 5abcf853e98b..e97dc299b563 100644
--- a/drivers/net/sky2.c
+++ b/drivers/net/sky2.c
@@ -1895,8 +1895,9 @@ static int sky2_change_mtu(struct net_device *dev, int new_mtu)
         if (new_mtu < ETH_ZLEN || new_mtu > ETH_JUMBO_MTU)
                 return -EINVAL;
 
+        /* TSO on Yukon Ultra and MTU > 1500 not supported */
         if (hw->chip_id == CHIP_ID_YUKON_EC_U && new_mtu > ETH_DATA_LEN)
-                return -EINVAL;
+                dev->features &= ~NETIF_F_TSO;
 
         if (!netif_running(dev)) {
                 dev->mtu = new_mtu;
@@ -3350,11 +3351,9 @@ static __devinit struct net_device *sky2_init_netdev(struct sky2_hw *hw,
 
         sky2->port = port;
 
-        if (hw->chip_id != CHIP_ID_YUKON_EC_U)
-                dev->features |= NETIF_F_TSO;
+        dev->features |= NETIF_F_TSO | NETIF_F_IP_CSUM | NETIF_F_SG;
         if (highmem)
                 dev->features |= NETIF_F_HIGHDMA;
-        dev->features |= NETIF_F_IP_CSUM | NETIF_F_SG;
 
 #ifdef SKY2_VLAN_TAG_USED
         dev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;