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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Florian Fainelli <f.fainelli@gmail.com>,
        "David S. Miller" <davem@davemloft.net>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 4.9 021/171] ax88179_178a: Check for supported Wake-on-LAN modes
Date:   Thu,  8 Nov 2018 13:49:51 -0800
Message-Id: <20181108215128.780345130@linuxfoundation.org>
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4.9-stable review patch.  If anyone has any objections, please let me know.

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

[ Upstream commit 5ba6b4aa9a410c5e2c6417df52b5e2118ea9b467 ]

The driver currently silently accepts unsupported Wake-on-LAN modes
(other than WAKE_PHY or WAKE_MAGIC) without reporting that to the user,
which is confusing.

Fixes: e2ca90c276e1 ("ax88179_178a: ASIX AX88179_178A USB 3.0/2.0 to gigabit ethernet adapter driver")
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/ax88179_178a.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/usb/ax88179_178a.c b/drivers/net/usb/ax88179_178a.c
index 8a6675d92b98..559af8e6ad90 100644
--- a/drivers/net/usb/ax88179_178a.c
+++ b/drivers/net/usb/ax88179_178a.c
@@ -566,6 +566,9 @@ ax88179_set_wol(struct net_device *net, struct ethtool_wolinfo *wolinfo)
 	struct usbnet *dev = netdev_priv(net);
 	u8 opt = 0;
 
+	if (wolinfo->wolopts & ~(WAKE_PHY | WAKE_MAGIC))
+		return -EINVAL;
+
 	if (wolinfo->wolopts & WAKE_PHY)
 		opt |= AX_MONITOR_MODE_RWLC;
 	if (wolinfo->wolopts & WAKE_MAGIC)
-- 
2.17.1