netdev - [PATCH] virtio_net: enable tx after resuming from suspend

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Message-Id: <20181011075127.2608-1-ake@igel.co.jp>
Date:   Thu, 11 Oct 2018 16:51:26 +0900
From:   Ake Koomsin <ake@...l.co.jp>
To:     Jason Wang <jasowang@...hat.com>
Cc:     ake@...l.co.jp, "Michael S. Tsirkin" <mst@...hat.com>,
        "David S. Miller" <davem@...emloft.net>,
        virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] virtio_net: enable tx after resuming from suspend

commit 713a98d90c5e ("virtio-net: serialize tx routine during reset")
disabled the virtio tx before going to suspend to avoid a use after free.
However, after resuming, it causes the virtio_net device to lose its
network connectivity.

To solve the issue, we need to enable tx after resuming.

Fixes commit 713a98d90c5e ("virtio-net: serialize tx routine during reset")
Signed-off-by: Ake Koomsin <ake@...l.co.jp>
---
 drivers/net/virtio_net.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index dab504ec5e50..3453d80f5f81 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -2256,6 +2256,7 @@ static int virtnet_restore_up(struct virtio_device *vdev)
 	}
 
 	netif_device_attach(vi->dev);
+	netif_start_queue(vi->dev);
 	return err;
 }
 
-- 
2.19.1