4.4-stable review patch. If anyone has any objections, please let me know.
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From: Eduardo Otubo otubo@redhat.com
[ Upstream commit b707fda2df4070785d0fa8a278aa13944c5f51f8 ]
When loading the module after unloading it, the network interface would not be enabled and thus wouldn't have a backend counterpart and unable to be used by the guest.
The guest would face errors like:
[root@guest ~]# ethtool -i eth0 Cannot get driver information: No such device
[root@guest ~]# ifconfig eth0 eth0: error fetching interface information: Device not found
This patch initializes the state of the netfront device whenever it is loaded manually, this state would communicate the netback to create its device and establish the connection between them.
Signed-off-by: Eduardo Otubo otubo@redhat.com Reviewed-by: Boris Ostrovsky boris.ostrovsky@oracle.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 --- drivers/net/xen-netfront.c | 1 + 1 file changed, 1 insertion(+)
--- a/drivers/net/xen-netfront.c +++ b/drivers/net/xen-netfront.c @@ -1331,6 +1331,7 @@ static struct net_device *xennet_create_
netif_carrier_off(netdev);
+ xenbus_switch_state(dev, XenbusStateInitialising); return netdev;
exit: