netdev - Re: [PATCH 1/6] sky2: fix hang on shutdown (and other irq issues)

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Message-ID: <20111117090104.002e110a@s6510.linuxnetplumber.net>
Date:	Thu, 17 Nov 2011 09:01:04 -0800
From:	Stephen Hemminger <shemminger@...tta.com>
To:	Sven Joachim <svenjoac@....de>
Cc:	davem@...emloft.net, netdev@...r.kernel.org
Subject: Re: [PATCH 1/6] sky2: fix hang on shutdown (and other irq issues)

On Thu, 17 Nov 2011 09:46:43 +0100
Sven Joachim <svenjoac@....de> wrote:

> On 2011-11-17 00:42 +0100, Stephen Hemminger wrote:
> 
> > There are several problems with recent change to how IRQ's are setup.
> >    * synchronize_irq in sky2_shutdown would hang because there
> >      was no IRQ setup.
> >    * when device was set to down, some IRQ bits left enabled so a
> >      hardware error would produce IRQ with no handler
> >    * quick link on Optima chip set was enabled without handler
> >    * suspend/resume would leave IRQ on with no handler if device
> >      was down
> 
> Unfortunately, this patch does not fix the hang at shutdown for me. :-(

You are probably stuck in some part of the code path in sky2_shutdown.
The best debug for this is sprinkling the code printk's. That is how I
narrowed the problem down to synchronize_irq.
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