linux-kernel - [PATCH net-next] ethtool: ioctl: account for sopass diff in set

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Date:   Mon, 12 Jun 2023 14:37:00 -0700
From:   Justin Chen <justin.chen@...adcom.com>
To:     netdev@...r.kernel.org
Cc:     bcm-kernel-feedback-list@...adcom.com,
        Justin Chen <justin.chen@...adcom.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, Andrew Lunn <andrew@...n.ch>,
        Daniil Tatianin <d-tatianin@...dex-team.ru>,
        Marco Bonelli <marco@...eim.net>,
        Vincent Mailhol <mailhol.vincent@...adoo.fr>,
        Maxim Korotkov <korotkov.maxim.s@...il.com>,
        Gal Pressman <gal@...dia.com>, Jiri Pirko <jiri@...nulli.us>,
        Kuniyuki Iwashima <kuniyu@...zon.com>,
        Simon Horman <simon.horman@...igine.com>,
        Florian Fainelli <florian.fainelli@...adcom.com>,
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH net-next] ethtool: ioctl: account for sopass diff in set_wol

sopass won't be set if wolopt doesn't change. This means the following
will fail to set the correct sopass.
ethtool -s eth0 wol s sopass 11:22:33:44:55:66
ethtool -s eth0 wol s sopass 22:44:55:66:77:88

Make sure we call into the driver layer set_wol if sopass is different.

Fixes: 55b24334c0f2 ("ethtool: ioctl: improve error checking for set_wol")
Signed-off-by: Justin Chen <justin.chen@...adcom.com>
---

Note: Tagged "Fixes" patch has not hit rc yet.

 net/ethtool/ioctl.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/ethtool/ioctl.c b/net/ethtool/ioctl.c
index 37b582225854..4a51e0ec295c 100644
--- a/net/ethtool/ioctl.c
+++ b/net/ethtool/ioctl.c
@@ -1452,7 +1452,8 @@ static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
 	if (wol.wolopts & ~cur_wol.supported)
 		return -EINVAL;
 
-	if (wol.wolopts == cur_wol.wolopts)
+	if (wol.wolopts == cur_wol.wolopts &&
+	    !memcmp(wol.sopass, cur_wol.sopass, sizeof(wol.sopass)))
 		return 0;
 
 	ret = dev->ethtool_ops->set_wol(dev, &wol);
-- 
2.7.4


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