From mboxrd@z Thu Jan 1 00:00:00 1970 From: Harald Hoyer Subject: Re: tg3 'No PHY devices' loading issue Date: Wed, 18 Apr 2012 10:14:47 +0200 Message-ID: <4F8E77F7.3080300@redhat.com> References: <20120417141856.GA19507@zod.bos.redhat.com> <20120417185007.GA3742@mcarlson.broadcom.com> <20120417193908.GG19507@zod.bos.redhat.com> <20120417210549.GI19507@zod.bos.redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: Matt Carlson , Michael Chan , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Ben Hutchings To: Josh Boyer Return-path: In-Reply-To: <20120417210549.GI19507@zod.bos.redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org Am 17.04.2012 23:05, schrieb Josh Boyer: > On Tue, Apr 17, 2012 at 03:39:08PM -0400, Josh Boyer wrote: >> 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: >>>> It has worked on some of the older kernels without the need for the >>>> manual rmmod/modprobe step, so it seems to be somewhat timing related. >>>> I'm not sure if there is a module load ordering issue, but that doesn't >>>> seem to be the case. I can't explain why a later modprobe would work >>>> just fine though. >>>> >>>> Do you have any thoughts on how to go about debugging/fixing this? I'd >>>> be happy to test and provide whatever information you need. >>> >>> 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. >>> >>> Can you reproduce the problem if you run 'rmmod broadcom' and then >>> reload tg3? >> >> I'll give it a shot, but that sounds like a quite plausible scenario to >> me. Oddly, even after the manual modprobe, the broadcom phy module >> doesn't show an increased use count. There's also no dependency on >> 'broadcom' listed for tg3 by modinfo. > > If I rmmod both tg3 and broadcom and then just load tg3 (either via > insmod or modprobe), it works fine. It does so because whatever you did > to make it request the phylib module from userspace also worked because > the broadcom module is loaded as well. > > So it seems my issue is basically because the initramfs isn't built with > the broadcom module included. I'll have to figure out a way to teach > dracut what to do here, since it doesn't seem to be automatically > picking it up (Harald CC'd). > > Thanks much for the very quick response from everyone. > > josh Ok, so we have to include all kernel/drivers/net/phy/*.ko in the initramfs?