linux-kernel - Re: tg3 'No PHY devices' loading issue

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Message-ID: <20120417191042.GB3932@decadent.org.uk>
Date:	Tue, 17 Apr 2012 20:10:42 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	Matt Carlson <mcarlson@...adcom.com>
Cc:	Josh Boyer <jwboyer@...hat.com>, Michael Chan <mchan@...adcom.com>,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: tg3 'No PHY devices' loading issue

On Tue, Apr 17, 2012 at 11:50:07AM -0700, Matt Carlson wrote:
> On Tue, Apr 17, 2012 at 10:18:57AM -0400, Josh Boyer wrote:
> > Hi Matt and Michael,
> > 
> > I'm seeing an odd issue with the tg3 driver on one of my development
> > machines.  I've tried kernels 3.2.10, 3.3.0, 3.3.1, 3.3.2 and 3.4-rc3
> > and they all seem to exhibit this issue now.  When the machine boots
> > and the tg3 driver is loaded, it fails to find a PHY and then reports
> > 'Problem fetching invariants of chip'.  If I do a rmmod/modprobe of
> > tg3 after login, the probe seems to work fine and ethernet works as
> > expected.  You can see this in the dmesg below:
[...]
> The 57788 uses the broadcom phylib module.  For some reason, it isn't
> available the first module load attempt.  A while ago, code was added to
> phylib to request modules from userspace if the particular phy support
> code wasn't already loaded.  It looks like this mechanism isn't working
> too well the first time through.
[...]

At a guess, tg3 is in the initramfs but broadcom isn't.

Ben.

-- 
Ben Hutchings
We get into the habit of living before acquiring the habit of thinking.
                                                              - Albert Camus
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