[PATCH net 3/7] lan78xx: Check for supported Wake-on-LAN modes

[Florian Fainelli]

The driver supports a fair amount of Wake-on-LAN modes, but is not
checking that the user specified one that is supported.

Fixes: 55d7de9de6c3 ("Microchip's LAN7800 family USB 2/3 to 10/100/1000 Ethernet device driver")
Signed-off-by: Florian Fainelli <f.fainelli@xxxxxxxxx>
---
 drivers/net/usb/lan78xx.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c
index a9991c5f4736..e0a588d1b8e6 100644
--- a/drivers/net/usb/lan78xx.c
+++ b/drivers/net/usb/lan78xx.c
@@ -1415,6 +1415,9 @@ static int lan78xx_set_wol(struct net_device *netdev,
 	if (wol->wolopts & WAKE_ARP)
 		pdata->wol |= WAKE_ARP;
 
+	if (pdata->wol == 0)
+		return -EINVAL;
+
 	device_set_wakeup_enable(&dev->udev->dev, (bool)wol->wolopts);
 
 	phy_ethtool_set_wol(netdev->phydev, wol);
-- 
2.17.1