Re: [PATCH net 3/7] lan78xx: Check for supported Wake-on-LAN modes

[Florian Fainelli]

On 09/25/2018 10:32 AM, Woojung.Huh@xxxxxxxxxxxxx wrote:
> Hi Florian,
> 
>>>> +	if (pdata->wol == 0)
>>>> +		return -EINVAL;
>>>> +
>>> It will make function return when disabling WOL.
>>
>> Huh, yes, good point.
>>
>>> Is there other place handling this scenario?
>>
>> How do you mean?
>>
> I meant there is another path I might miss when disabling WOL 
> than this xxx_set_wol().

I don't think so, at least not from the ethtool perspective, this should
fix the issue before, and simplifying the code, since all we are doing
it taking a bitmask, checking each bit we support, and again, make it
the same bitmask in pdata->wol, can you test that? If you have a new
enough version of ethtool, try using: ethtool -s <iface> wol f, which
was added recently and which this driver does not support:

diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c
index a9991c5f4736..2e37028ef6ca 100644
--- a/drivers/net/usb/lan78xx.c
+++ b/drivers/net/usb/lan78xx.c
@@ -1401,19 +1401,10 @@ static int lan78xx_set_wol(struct net_device
*netdev,
        if (ret < 0)
                return ret;

-       pdata->wol = 0;
-       if (wol->wolopts & WAKE_UCAST)
-               pdata->wol |= WAKE_UCAST;
-       if (wol->wolopts & WAKE_MCAST)
-               pdata->wol |= WAKE_MCAST;
-       if (wol->wolopts & WAKE_BCAST)
-               pdata->wol |= WAKE_BCAST;
-       if (wol->wolopts & WAKE_MAGIC)
-               pdata->wol |= WAKE_MAGIC;
-       if (wol->wolopts & WAKE_PHY)
-               pdata->wol |= WAKE_PHY;
-       if (wol->wolopts & WAKE_ARP)
-               pdata->wol |= WAKE_ARP;
+       if (pdata->wol & ~WAKE_ALL)
+               return -EINVAL;
+
+       pdata->wol = wol->wolopts;

        device_set_wakeup_enable(&dev->udev->dev, (bool)wol->wolopts);


-- 
Florian