linux-kernel - Re: Natsemi DP83815 driver spaming

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Message-ID: <20070501180830.GA31630@sirena.org.uk>
Date:	Tue, 1 May 2007 19:08:31 +0100
From:	Mark Brown <broonie@...ena.org.uk>
To:	Rafał Bilski <rafalbilski@...eria.pl>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: Natsemi DP83815 driver spaming

On Tue, May 01, 2007 at 12:25:20PM +0200, Rafał Bilski wrote:

> eth0: Media selection timer tick.
> eth0: possible phy reset: re-initializing

This is why the reset is being triggered - it's a workaround for a hardware
bug which checks to make sure the hardware is in the state that the
kernel thinks it is is going off.  The code has this explanatory comment:

 * 2) check for sudden death of the NIC:
 *    It seems that a reference set for this chip went out with incorrect info,
 *    and there exist boards that aren't quite right.  An unexpected voltage
 *    drop can cause the PHY to get itself in a weird state (basically reset).
 *    NOTE: this only seems to affect revC chips.

I'd suggest checking your power supply as a first step.

[BTW, as Andrew said please don't drop people from the CC.]

-- 
"You grabbed my hand and we fell into it, like a daydream - or a fever."

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