From: Yelena Krivosheev <yelena@marvell.com>
Date: Wed, 18 Jul 2018 16:10:51 +0000 (+0200)
Subject: net: mvneta: fix mtu change on port without link
X-Git-Tag: v4.14.71~60
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=fd4e3615936cb2cce9d96c32211fa21f0aaea673;p=platform%2Fkernel%2Flinux-exynos.git

net: mvneta: fix mtu change on port without link

[ 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@marvell.com>
[gregory.clement: adding Fixes tags and rewording commit log]
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.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/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c
index 3deaa34..074a5b7 100644
--- a/drivers/net/ethernet/marvell/mvneta.c
+++ b/drivers/net/ethernet/marvell/mvneta.c
@@ -3195,7 +3195,6 @@ static int mvneta_change_mtu(struct net_device *dev, int mtu)
 
 	on_each_cpu(mvneta_percpu_enable, pp, true);
 	mvneta_start_dev(pp);
-	mvneta_port_up(pp);
 
 	netdev_update_features(dev);