tg3: Enable PHY reset in MTU change path for 5720

[ Upstream commit e60ee41aaf898584205a6af5c996860d0fe6a836 ]

A customer noticed RX path hang when MTU is changed on the fly while
running heavy traffic with NCSI enabled for 5717 and 5719. Since 5720
belongs to same ASIC family, we observed same issue and same fix
could solve this problem for 5720.

Signed-off-by: Siva Reddy Kallam <siva.kallam@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c
index e0b446525f5348851ba2540dc1c137c460da9288..397bc868559b40ec6f9ed26d68e99cfa7c12a045 100644 (file)
--- a/drivers/net/ethernet/broadcom/tg3.c
+++ b/drivers/net/ethernet/broadcom/tg3.c
@@ -14214,7 +14214,8 @@ static int tg3_change_mtu(struct net_device *dev, int new_mtu)
         */
        if (tg3_asic_rev(tp) == ASIC_REV_57766 ||
            tg3_asic_rev(tp) == ASIC_REV_5717 ||
-           tg3_asic_rev(tp) == ASIC_REV_5719)
+           tg3_asic_rev(tp) == ASIC_REV_5719 ||
+           tg3_asic_rev(tp) == ASIC_REV_5720)
                reset_phy = true;
 
        err = tg3_restart_hw(tp, reset_phy);