linux-kernel - Re: [PATCH NET V5 2/2] net: hns: Use phy

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Date:   Sat, 1 Jul 2017 17:17:07 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     linyunsheng <linyunsheng@...wei.com>
Cc:     davem <davem@...emloft.net>, "f.fainelli" <f.fainelli@...il.com>,
        huangdaode <huangdaode@...ilicon.com>,
        "xuwei (O)" <xuwei5@...ilicon.com>,
        "Liguozhu (Kenneth)" <liguozhu@...ilicon.com>,
        "Zhuangyuzeng (Yisen)" <yisen.zhuang@...wei.com>,
        Gabriele Paoloni <gabriele.paoloni@...wei.com>,
        John Garry <john.garry@...wei.com>,
        Linuxarm <linuxarm@...wei.com>,
        Salil Mehta <salil.mehta@...wei.com>,
        "lipeng (Y)" <lipeng321@...wei.com>, tremyfr <tremyfr@...il.com>,
        netdev <netdev@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH NET V5 2/2] net: hns: Use phy_driver to setup Phy loopback

On Sat, Jul 01, 2017 at 11:57:32AM +0000, linyunsheng wrote:
> Hi, Andrew
> 
> I am agreed wih you on this.
> But self test is also a feature of our product, and our
> customer way choose to diagnose a problem using
> self test, even if self test does not give a clear
> reason to the problem.
> we don't want to remove a feature that we don't
> know when our customer will be using.

Far enough. So please take a close look at the code and try to fix
it. The corner cases are your problem, a down'ed interface, WOL, etc.
It is issues like this which can result in phy_resume() being called
without there first being a phy_suspend.

	Andrew