linux-kernel - [PATCH 3.16 276/328] smsc75xx: Check for Wake-on-LAN modes

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Message-ID: <lsq.1544392233.685213946@decadent.org.uk>
Date:   Sun, 09 Dec 2018 21:50:33 +0000
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org, "David S. Miller" <davem@...emloft.net>,
        "Florian Fainelli" <f.fainelli@...il.com>
Subject: [PATCH 3.16 276/328] smsc75xx: Check for Wake-on-LAN modes

3.16.62-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Florian Fainelli <f.fainelli@...il.com>

commit 9c734b2769a73eea2e9e9767c0e0bf839ff23679 upstream.

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: 6c636503260d ("smsc75xx: add wol magic packet support")
Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/net/usb/smsc75xx.c | 3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/net/usb/smsc75xx.c
+++ b/drivers/net/usb/smsc75xx.c
@@ -728,6 +728,9 @@ static int smsc75xx_ethtool_set_wol(stru
 	struct smsc75xx_priv *pdata = (struct smsc75xx_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);