netdev - Re: [PATCH net-next 0/2] net: phy: improve PM handling of PHY/MDIO

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Message-Id: <20180604.154114.1354490403993234203.davem@davemloft.net>
Date:   Mon, 04 Jun 2018 15:41:14 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     hkallweit1@...il.com
Cc:     andrew@...n.ch, f.fainelli@...il.com, netdev@...r.kernel.org
Subject: Re: [PATCH net-next 0/2] net: phy: improve PM handling of PHY/MDIO

From: Heiner Kallweit <hkallweit1@...il.com>
Date: Sat, 2 Jun 2018 22:33:36 +0200

> Current implementation of MDIO bus PM ops doesn't actually implement
> bus-specific PM ops but just calls PM ops defined on a device level
> what doesn't seem to be fully in line with the core PM model.
> 
> When looking e.g. at __device_suspend() the PM core looks for PM ops
> of a device in a specific order:
> 1. device PM domain
> 2. device type
> 3. device class
> 4. device bus
> 
> I think it has good reason that there's no PM ops on device level.
> The situation can be improved by modeling PHY's as device type of
> a MDIO device. If for some other type of MDIO device PM ops are
> needed, it could be modeled as struct device_type as well.

Andrew and Florian, it would nice if one of you would review this
patch series.

Thank you.