linux-kernel - Re: [PATCH 2/3] ide: add ide_[un]lock

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Message-Id: <200812140015.51978.bzolnier@gmail.com>
Date:	Sun, 14 Dec 2008 00:15:51 +0100
From:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
To:	Michael Schmitz <schmitz@...phys.uni-duesseldorf.de>
Cc:	linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Elias Oltmanns <eo@...ensachen.de>
Subject: Re: [PATCH 2/3] ide: add ide_[un]lock_hwgroup() helpers


[ Sorry for the late reply. ]

On Wednesday 19 November 2008, Michael Schmitz wrote:
> > -	while (!hwgroup->busy) {
> > -		hwgroup->busy = 1;
> > -		/* for atari only */
> > -		ide_get_lock(ide_intr, hwgroup);
> > +	while (!ide_lock_hwgroup(hwgroup)) {
> 
> Something I've run into while working on the locking stuff: what happens if the 
> above ide_lock_hwgroup(hwgroup) sleeps for long enough to trigger the request 
> timer? 

AFAICS this happens before the hwgroup timeout timer is armed and IDE is not
using block layer request timers yet so we should be fine here..

Thanks,
Bart
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