netdev - Re: [PATCH] net: fec: Fix phy_device lookup for phy_reset_after_clk

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Message-ID: <20201009110230.3d8693df@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com>
Date:   Fri, 9 Oct 2020 11:02:30 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Marek Vasut <marex@...x.de>
Cc:     Florian Fainelli <f.fainelli@...il.com>, netdev@...r.kernel.org,
        Christoph Niedermaier <cniedermaier@...electronics.com>,
        "David S . Miller" <davem@...emloft.net>,
        NXP Linux Team <linux-imx@....com>,
        Richard Leitner <richard.leitner@...data.com>,
        Shawn Guo <shawnguo@...nel.org>, Andrew Lunn <andrew@...n.ch>,
        Heiner Kallweit <hkallweit1@...il.com>
Subject: Re: [PATCH] net: fec: Fix phy_device lookup for
 phy_reset_after_clk_enable()

On Fri, 9 Oct 2020 19:34:10 +0200 Marek Vasut wrote:
> >>> To an untrained eye this looks pretty weird.    
> >>
> >> I see, I'm not quite sure how to address this comment.  
> > 
> > If ndev->phydev sometimes is not-NULL on open, then that's a valid
> > state to be in. Why not make sure that we're always in that state 
> > and can depend on ndev->phydev rather than rummaging around for 
> > the phy_device instance.  
> 
> Nope, the problem is in probe() in this case.

In that case it would be cleaner to pass fep and phydev as arguments
into fec_enet_clk_enable(), rather than netdev, and have only probe()
do the necessary dance.