linux-kernel - Re: [patch 27/27] ath5k: fix suspend-related oops on rmmod

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Date:	Fri, 24 Oct 2008 14:28:04 -0700
From:	Greg KH <gregkh@...e.de>
To:	Elias Oltmanns <eo@...ensachen.de>
Cc:	linux-kernel@...r.kernel.org, stable@...nel.org, jejb@...nel.org,
	Justin Forbes <jmforbes@...uxtx.org>,
	Zwane Mwaikambo <zwane@....linux.org.uk>,
	Theodore Ts'o <tytso@....edu>,
	Randy Dunlap <rdunlap@...otime.net>,
	Dave Jones <davej@...hat.com>,
	Chuck Wolber <chuckw@...ntumlinux.com>,
	Chris Wedgwood <reviews@...cw.f00f.org>,
	Michael Krufky <mkrufky@...uxtv.org>,
	Chuck Ebbert <cebbert@...hat.com>,
	Domenico Andreoli <cavokz@...il.com>, Willy Tarreau <w@....eu>,
	Rodrigo Rubira Branco <rbranco@...checkpoint.com>,
	Jake Edge <jake@....net>, Eugene Teo <eteo@...hat.com>,
	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, Bob Copeland <me@...copeland.com>,
	"John W. Linville" <linville@...driver.com>
Subject: Re: [patch 27/27] ath5k: fix suspend-related oops on rmmod

On Fri, Oct 24, 2008 at 10:36:24PM +0200, Elias Oltmanns wrote:
> Greg KH <gregkh@...e.de> wrote:
> > 2.6.27-stable review patch.  If anyone has any objections, please let us 
> > know.
> >
> > ------------------
> > From: Bob Copeland <me@...copeland.com>
> >
> > commit 8bdd5b9c6bd53add260756b6673a0545fbdbba21 upstream
> >
> > Based on a patch by Elias Oltmanns, we call ath5k_init in resume even
> > if we didn't previously open the device.  Besides starting up the
> > device unnecessarily, this also causes an oops on rmmod because
> > mac80211 will not invoke ath5k_stop and softirqs are left running after
> > the module has been unloaded.  Add a new state bit, ATH_STAT_STARTED,
> > to indicate that we have been started up.
> >
> > Reported-by: Toralf Förster <toralf.foerster@....de>
> > Signed-off-by: Elias Oltmanns <eo@...ensachen.de>
> > Signed-off-by: Bob Copeland <me@...copeland.com>
> > Signed-off-by: John W. Linville <linville@...driver.com>
> > Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
> 
> I've done some more testing and I'm ashamed to say that this patch is
> incomplete and does indeed introduce a regression itself. Having only
> just sent the fix to John, I'm afraid this patch has to be deferred for
> the next stable release since the required fix is not likely to hit
> Linus' tree in time. Anyway, I'm adding my patch and the changelog entry
> by way of explanation.

Ok, I've dropped this from the 2.6.27-stable queue now, thanks for
letting me know.

greg k-h
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