net: bgmac: Start transmit queue in bgmac_open

BugLink: http://bugs.launchpad.net/bugs/1702863

commit c3897f2a upstream.

The driver does not start the transmit queue in bgmac_open(). If the
queue was stopped prior to closing then re-opening the interface, we
would never be able to wake-up again.

Fixes: dd4544f0 ("bgmac: driver for GBit MAC core on BCMA bus")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>

drivers/net/ethernet/broadcom/bgmac.c

@@ -1309,6 +1309,9 @@ static int bgmac_open(struct net_device *net_dev)
 	phy_start(bgmac->phy_dev);
 
 	netif_carrier_on(net_dev);
+
+	netif_start_queue(net_dev);
+
 	return 0;
 }