Re: [PATCH net-next V1 3/4] net: stmmac: Reconfigure the PHY WOL settings in stmmac_resume()

[Andrew Lunn <andrew@lunn.ch>]

> I would like to rephase the commit message to make things clear:
> 
> After PHY received a magic packet, the PHY WOL event will be
> triggered. At the same time, the "Magic Packet Match Detected" bit
> is set. In order for the PHY WOL event to be triggered again, the 
> WOL event status of "Magic Packet Match Detected" bit needs to be 
> cleared. When the PHY is in polling mode, the WOL event status needs
> to be manually cleared.
> 
> Ethtool settings will remain with WOL enabled after a S3/S4
> suspend resume cycle as expected. Hence, the driver should
> reconfigure the PHY settings to reenable/disable WOL
> depending on the ethtool WOL settings in the MAC resume flow.
> The PHY set_wol flow would clear the WOL event status.

I would still argue that making use of a WoL interrupts and PHY
polling is just wrong. But i assume you cannot fix this? You have a
hardware design error?

The problem with this solution is you need to modify every MAC driver
using the Marvell PHY. It does not scale.

Please try to find a solution within phylib or the marvell
driver. Something which will work for any broken setup which is using
WoL interrupts combined with polling.

    Andrew