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-rw-r--r--drivers/net/ethernet/broadcom/tg3.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c
index 0da93db..a8490a4 100644
--- a/drivers/net/ethernet/broadcom/tg3.c
+++ b/drivers/net/ethernet/broadcom/tg3.c
@@ -12267,7 +12267,7 @@ static inline void tg3_set_mtu(struct net_device *dev, struct tg3 *tp,
static int tg3_change_mtu(struct net_device *dev, int new_mtu)
{
struct tg3 *tp = netdev_priv(dev);
- int err;
+ int err, reset_phy = 0;
if (new_mtu < TG3_MIN_MTU || new_mtu > TG3_MAX_MTU(tp))
return -EINVAL;
@@ -12290,7 +12290,13 @@ static int tg3_change_mtu(struct net_device *dev, int new_mtu)
tg3_set_mtu(dev, tp, new_mtu);
- err = tg3_restart_hw(tp, 0);
+ /* Reset PHY, otherwise the read DMA engine will be in a mode that
+ * breaks all requests to 256 bytes.
+ */
+ if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_57766)
+ reset_phy = 1;
+
+ err = tg3_restart_hw(tp, reset_phy);
if (!err)
tg3_netif_start(tp);