korina: disable napi on close and restart

Without this the driver will crash when the NIC is being restarted.

Signed-off-by: Phil Sutter <n0-1@freewrt.org>
Acked-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/korina.c

@@ -904,6 +904,8 @@ static int korina_restart(struct net_device *dev)
 
 	korina_free_ring(dev);
 
+	napi_disable(&lp->napi);
+
 	ret = korina_init(dev);
 	if (ret < 0) {
 		printk(KERN_ERR DRV_NAME "%s: cannot restart device\n",
@@ -1070,6 +1072,8 @@ static int korina_close(struct net_device *dev)
 
 	korina_free_ring(dev);
 
+	napi_disable(&lp->napi);
+
 	free_irq(lp->rx_irq, dev);
 	free_irq(lp->tx_irq, dev);
 	free_irq(lp->ovr_irq, dev);