releases/4.9.136/smsc95xx-check-for-wake-on-lan-modes.patch

From a8845cfa6f488f4b8346795e5647b781806fcdba Mon Sep 17 00:00:00 2001
From: Florian Fainelli <f.fainelli@gmail.com>
Date: Fri, 28 Sep 2018 16:18:56 -0700
Subject: smsc95xx: Check for Wake-on-LAN modes

[ Upstream commit c530c471ba37bdd9fe1c7185b01455c00ae606fb ]

The driver does not check for Wake-on-LAN modes specified by an user,
but will conditionally set the device as wake-up enabled or not based on
that, which could be a very confusing user experience.

Fixes: e0e474a83c18 ("smsc95xx: add wol magic packet support")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/usb/smsc95xx.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/usb/smsc95xx.c b/drivers/net/usb/smsc95xx.c
index 831aa33d078a..a167116ceeee 100644
--- a/drivers/net/usb/smsc95xx.c
+++ b/drivers/net/usb/smsc95xx.c
@@ -775,6 +775,9 @@ static int smsc95xx_ethtool_set_wol(struct net_device *net,
 	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 	int ret;
 
+	if (wolinfo->wolopts & ~SUPPORTED_WAKE)
+		return -EINVAL;
+
 	pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
 
 	ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
-- 
2.17.1