netdev - Re: [PATCH 1/6] phylib: add mdiobus

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Message-Id: <AA75D6CD-4BEA-4189-AFA9-4111D77804B9@freescale.com>
Date:	Mon, 29 Sep 2008 18:30:28 -0500
From:	Andy Fleming <afleming@...escale.com>
To:	Lennert Buytenhek <buytenh@...tstofly.org>
Cc:	netdev@...r.kernel.org, Byron Bradley <byron.bbradley@...il.com>,
	Jesper Dangaard Brouer <jdb@...x.dk>,
	Tim Ellis <tim.ellis@....com>, Imre Kaloz <kaloz@...nwrt.org>,
	Nicolas Pitre <nico@....org>, Dirk Teurlings <dirk@...xia.nl>,
	Peter van Valderen <p.v.valderen@...il.com>
Subject: Re: [PATCH 1/6] phylib: add mdiobus_{read,write}


On Sep 28, 2008, at 21:37, Lennert Buytenhek wrote:

> Add mdiobus_{read,write} routines to allow direct reading/writing
> of registers on an mii bus without having to go through the PHY
> abstraction, and make phy_{read,write} use these primitives.
>
> Signed-off-by: Lennert Buytenhek <buytenh@...vell.com>

Looks pretty good.  I was actually just thinking this might be handy  
for some code we're working on.

Just one comment...

>
> --- a/drivers/net/phy/phy.c
> +++ b/drivers/net/phy/phy.c
> @@ -68,16 +68,7 @@ EXPORT_SYMBOL(phy_print_status);
>  */
> int phy_read(struct phy_device *phydev, u16 regnum)
> {
> -	int retval;
> -	struct mii_bus *bus = phydev->bus;
> -
> -	BUG_ON(in_interrupt());
> -
> -	mutex_lock(&bus->mdio_lock);
> -	retval = bus->read(bus, phydev->addr, regnum);
> -	mutex_unlock(&bus->mdio_lock);
> -
> -	return retval;
> +	return mdiobus_read(phydev->bus, phydev->addr, regnum);
> }
> EXPORT_SYMBOL(phy_read);


I agree with Trent.  Move these into phy.h and make them static inline


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