linux-kernel - Re: [Regression, 2.6.36-rc1] ath9k resume problem on Acer Ferrari One

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Message-ID: <AANLkTi=S3JE=1J9xQtBAN5hHTqGSfohi4vL82iZHMWp+@mail.gmail.com>
Date:	Wed, 18 Aug 2010 18:00:47 -0700
From:	"Luis R. Rodriguez" <lrodriguez@...eros.com>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Tejun Heo <tj@...nel.org>, LKML <linux-kernel@...r.kernel.org>,
	Linux-pm mailing list <linux-pm@...ts.linux-foundation.org>,
	linux-wireless@...r.kernel.org, ath9k-devel@...ts.ath9k.org,
	Maciej Rutecki <maciej.rutecki@...il.com>
Subject: Re: [Regression, 2.6.36-rc1] ath9k resume problem on Acer Ferrari One

On Wed, Aug 18, 2010 at 3:01 PM, Rafael J. Wysocki <rjw@...k.pl> wrote:
> Hi,
>
> While testing 2.6.36-rc1 (with a couple of fixes on top)

Which couple of fixes?

> I noticed that the ath9k
> driver didn't work after resume from suspend to RAM.

To rule out if its an ath9k issue you can try
compat-wireless-2.6.36-rc1 from here:

http://wireless.kernel.org/en/users/Download/stable/

and install it on an older kernel, you can use ./scripts/driver-select
to only enable ath9k to compile.

I've been using pm-suspend on this release for a few days now without
any issue but I am using an AR9003 chipset. What chipset are you
using? Can you provide the dmesg output upon module load?

>  An attempt to unload the
> driver using rmmod caused the BUG_ON() in kernel/workqueue.c:2844 to trigger.

That's a bug, a regression likely.

> I wonder if that regression is a result of the recent workqueue changes?

Yeah very likely.

  Luis
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