linux-kernel - [PATCH 4.14 022/165] hv_netvsc: only wake transmit queue if link is up

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Message-Id: <20180524093622.877633496@linuxfoundation.org>
Date:   Thu, 24 May 2018 11:37:08 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Stephen Hemminger <sthemmin@...rosoft.com>,
        "David S. Miller" <davem@...emloft.net>
Subject: [PATCH 4.14 022/165] hv_netvsc: only wake transmit queue if link is up

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

------------------

From: Stephen Hemminger <stephen@...workplumber.org>

[ Commit f4950e4586dfc957e0a28226eeb992ddc049b5a2 upstream. ]

Don't wake transmit queues if link is not up yet.

Signed-off-by: Stephen Hemminger <sthemmin@...rosoft.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/hyperv/netvsc_drv.c |    7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

--- a/drivers/net/hyperv/netvsc_drv.c
+++ b/drivers/net/hyperv/netvsc_drv.c
@@ -88,12 +88,11 @@ static int netvsc_open(struct net_device
 		return ret;
 	}
 
-	netif_tx_wake_all_queues(net);
-
 	rdev = nvdev->extension;
-
-	if (!rdev->link_state)
+	if (!rdev->link_state) {
 		netif_carrier_on(net);
+		netif_tx_wake_all_queues(net);
+	}
 
 	if (vf_netdev) {
 		/* Setting synthetic device up transparently sets