linux-kernel - Re: [PATCH NET] net/hns:bugfix of ethtool -t phy self

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Date:   Tue, 20 Jun 2017 15:28:57 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     l00371289 <linyunsheng@...wei.com>
Cc:     Florian Fainelli <f.fainelli@...il.com>, davem@...emloft.net,
        huangdaode@...ilicon.com, xuwei5@...ilicon.com,
        liguozhu@...ilicon.com, Yisen.Zhuang@...wei.com,
        gabriele.paoloni@...wei.com, john.garry@...wei.com,
        linuxarm@...wei.com, salil.mehta@...wei.com, lipeng321@...wei.com,
        yankejian@...wei.com, tremyfr@...il.com, xieqianqian@...wei.com,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH NET] net/hns:bugfix of ethtool -t phy self_test

> >> The question really is, why is not this properly integrated into the PHY
> >> driver and PHYLIB such that the only thing the Ethernet MAC driver has
> >> to call is a function of the PHY driver putting it in self-test?
> > 
> > This whole driver pokes various PHY registers, rather than use
> > phylib. And it does so without taking the PHY lock. 
> I will consider using phylib as much as possible, thanks.
> 
> It also assumes it
> > is a Marvell PHY and i don't see anywhere it actually verifies this.
> When it said Marvell Phy , I meant Marvell Phy with fibre support.
> I will send anther patch to only setting bit in Fiber Control when
> it is a Marvell Phy with fibre support.

There is a lot more broken than just that.

You really should remove all code which is accessing the PHY, and add
support to phylib and the drivers for what you need.

    Andrew