[PATCH 4.18 117/158] net: mvneta: fix mtu change on port without link

From: Greg Kroah-Hartman
Date: Mon Sep 17 2018 - 19:15:00 EST

4.18-stable review patch. If anyone has any objections, please let me know.


From: Yelena Krivosheev <yelena@xxxxxxxxxxx>

[ Upstream commit 8466baf788ec3e18836bd9c91ba0b1a07af25878 ]

It is incorrect to enable TX/RX queues (call by mvneta_port_up()) for
port without link. Indeed MTU change for interface without link causes TX
queues to stuck.

Fixes: c5aff18204da ("net: mvneta: driver for Marvell Armada 370/XP
network unit")
Signed-off-by: Yelena Krivosheev <yelena@xxxxxxxxxxx>
[gregory.clement: adding Fixes tags and rewording commit log]
Signed-off-by: Gregory CLEMENT <gregory.clement@xxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
drivers/net/ethernet/marvell/mvneta.c | 1 -
1 file changed, 1 deletion(-)

--- a/drivers/net/ethernet/marvell/mvneta.c
+++ b/drivers/net/ethernet/marvell/mvneta.c
@@ -3196,7 +3196,6 @@ static int mvneta_change_mtu(struct net_

on_each_cpu(mvneta_percpu_enable, pp, true);
- mvneta_port_up(pp);