linux-kernel - Re: [PATCH 2/2] net: gmii2rgmii: Switch priv field in mdio device structure

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Message-ID: <20190813132321.GF15047@lunn.ch>
Date:   Tue, 13 Aug 2019 15:23:21 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Harini Katakam <harinik@...inx.com>
Cc:     Harini Katakam <harini.katakam@...inx.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        David Miller <davem@...emloft.net>,
        Michal Simek <michal.simek@...inx.com>, netdev@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        radhey.shyam.pandey@...inx.com
Subject: Re: [PATCH 2/2] net: gmii2rgmii: Switch priv field in mdio device
 structure

On Tue, Aug 13, 2019 at 04:46:40PM +0530, Harini Katakam wrote:
> Hi Andrew,
> 
> On Thu, Aug 1, 2019 at 9:36 AM Andrew Lunn <andrew@...n.ch> wrote:
> >
> > On Wed, Jul 31, 2019 at 03:06:19PM +0530, Harini Katakam wrote:
> > > Use the priv field in mdio device structure instead of the one in
> > > phy device structure. The phy device priv field may be used by the
> > > external phy driver and should not be overwritten.
> >
> > Hi Harini
> >
> > I _think_ you could use dev_set_drvdata(&mdiodev->dev) in xgmiitorgmii_probe() and
> > dev_get_drvdata(&phydev->mdiomdio.dev) in _read_status()
> 
> Thanks for the review. This works if I do:
> dev_set_drvdata(&priv->phy_dev->mdio.dev->dev) in probe
> and then
> dev_get_drvdata(&phydev->mdio.dev) in _read_status()
> 
> i.e mdiodev in gmii2rgmii probe and priv->phy_dev->mdio are not the same.
> 
> If this is acceptable, I can send a v2.

Hi Harini

I think this is better, making use of the central driver
infrastructure, rather than inventing something new.

The kernel does have a few helper, spi_get_drvdata, pci_get_drvdata,
hci_get_drvdata. So maybe had add phydev_get_drvdata(struct phy_device
*phydev)?

	Thanks
		Andrew