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: 55b2433 ("ethtool: ioctl: improve error checking for set_wol")
Signed-off-by: Justin Chen <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

Author: Ryceancurry

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);