[TG3]: disallow jumbo TSO on 5780

Disallow jumbo TSO on 5780 due to hardware restrictions.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 11 insertions, 3 deletions

diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index 2b7d99fc257c..04d8b18e2912 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -3443,10 +3443,18 @@ static inline void tg3_set_mtu(struct net_device *dev, struct tg3 *tp,
 {
         dev->mtu = new_mtu;
 
-        if (new_mtu > ETH_DATA_LEN)
-                tp->tg3_flags |= TG3_FLAG_JUMBO_RING_ENABLE;
-        else
+        if (new_mtu > ETH_DATA_LEN) {
+                if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5780) {
+                        tp->tg3_flags2 &= ~TG3_FLG2_TSO_CAPABLE;
+                        ethtool_op_set_tso(dev, 0);
+                }
+                else
+                        tp->tg3_flags |= TG3_FLAG_JUMBO_RING_ENABLE;
+        } else {
+                if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5780)
+                        tp->tg3_flags2 |= TG3_FLG2_TSO_CAPABLE;
                 tp->tg3_flags &= ~TG3_FLAG_JUMBO_RING_ENABLE;
+        }
 }
 
 static int tg3_change_mtu(struct net_device *dev, int new_mtu)