netdev - Re: [PATCH] smsc95xx: support ethtool get

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Date:	Mon, 9 Jul 2012 09:44:26 -0400 (EDT)
From:	Émeric Vigier 
	<emeric.vigier@...oirfairelinux.com>
To:	Ben Hutchings <bhutchings@...arflare.com>
Cc:	Steve Glendinning <steve@...well.net>,
	steve glendinning <steve.glendinning@...c.com>,
	netdev@...r.kernel.org, Nancy Lin <nancy.lin@...c.com>
Subject: Re: [PATCH] smsc95xx: support ethtool get_regs

----- Mail original -----
> On Sat, 2012-07-07 at 09:58 -0400, Émeric Vigier wrote:
> [...]
> > > > +	for (i = 0; i <= PHY_SPECIAL; i++)
> > > > +		data[j++] = smsc95xx_mdio_read(netdev, dev->mii.phy_id, i);
> > > > +}
> > > 
> > > Again, why use PHY_SPECIAL (+ 1) here as opposed to 32 in the
> > > calculation of the length?
> > 
> > 32 was ok, but I hesitated between defining a SMSC95XX_PHY_END or
> > using the last defined register.
> > Are 32 register-PHY generic to most devices? I mean could 32 be use
> > widely?
> 
> Yes, the address space for the original MDIO protocol ('clause 22')
> allows for 32 registers.  Perhaps that number should be named in
> <linux/mii.h>.

I have not found any definition of this in mii.h.

> 
> As another reviewer commented, though, MDIO PHY registers should be
> accessible with SIOCGMIIREG and mii-tool so it's not really necessary
> to
> duplicate them here.

Ok, I remove this then.

> 
> Ben.
> 
> --
> Ben Hutchings, Staff Engineer, Solarflare
> Not speaking for my employer; that's the marketing department's job.
> They asked us to note that Solarflare product names are trademarked.
> 
> 

-- 
Emeric
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