Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753746AbZGAQ0W (ORCPT ); Wed, 1 Jul 2009 12:26:22 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752755AbZGAQ0F (ORCPT ); Wed, 1 Jul 2009 12:26:05 -0400 Received: from mail-fx0-f218.google.com ([209.85.220.218]:40709 "EHLO mail-fx0-f218.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752295AbZGAQ0C (ORCPT ); Wed, 1 Jul 2009 12:26:02 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=from:to:subject:date:user-agent:cc:references:in-reply-to :mime-version:content-disposition:message-id:content-type :content-transfer-encoding; b=oqAYUgujPnqIWfMpBxOqQ7+Uh+/XU0cMgJyktvrP43e/AkshqKlojCV/hpqbtJj6m8 590oOr9sDKfBuQQ4lKzk4uAuoenvzEwypAiCRZc6DJ79QlqgGrn35ITw5DaYoFO3qsre fElb8ByFi5tGhbmxStTxngumTjf2fmFX9oyQ0= From: Bartlomiej Zolnierkiewicz To: wuzhangjin@gmail.com Subject: Re: [Bug #13663] suspend to ram regression (IDE related) Date: Wed, 1 Jul 2009 18:29:15 +0200 User-Agent: KMail/1.11.4 (Linux/2.6.31-rc1-next-20090701-03251-gbe98b01-dirty; KDE/4.2.4; i686; ; ) Cc: Jeff Chua , Etienne Basset , David Miller , rjw@sisk.pl, linux-kernel@vger.kernel.org, kernel-testers@vger.kernel.org, Ralf Baechle , linux-mips@linux-mips.org, linux-ide@vger.kernel.org References: <1246459661.9660.40.camel@falcon> <200907011821.26091.bzolnier@gmail.com> In-Reply-To: <200907011821.26091.bzolnier@gmail.com> MIME-Version: 1.0 Content-Disposition: inline Message-Id: <200907011829.16850.bzolnier@gmail.com> Content-Type: Text/Plain; charset="iso-8859-15" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3568 Lines: 103 On Wednesday 01 July 2009 18:21:25 Bartlomiej Zolnierkiewicz wrote: > On Wednesday 01 July 2009 16:47:41 Wu Zhangjin wrote: > > On Wed, 2009-07-01 at 22:31 +0800, Jeff Chua wrote: > > > On Tue, Jun 30, 2009 at 12:21 AM, Jeff Chua wrote: > > > > > > > I just tried, and it "seems" to work. Will try a few more cycles. > > > > > > STD/STR survived quite a few cycles now. Patch seems to be doing the > > > right thing. > > > > > > On Mon, Jun 29, 2009 at 11:51 PM, Etienne > > > Basset wrote: > > > > > > > To have STR/resume work with current git, I have to : > > > > > > > 1) apply Bart's patch > > > > > > This is not yet in Linus's tree. And much needed to really fix the problem. > > > > > > > 2) revert this commit : a1317f714af7aed60ddc182d0122477cbe36ee9b > > > > > > > Yes, This commit must be reverted, otherwise, STD/Hibernation will not > > work either. I have tested it on two different loongson-based machines: > > fuloong2e box and yeeloong2f netbook.(loongson is mips compatiable) > > Since it seems like Dave is taking his sweet time with doing the revert > I stared at the code a bit more and I think that I finally found the bug > (thanks to your debugging work for giving me the right hint!). > > The patch needs to take into the account a new code introduced by the recent > block layer changes (commit 8f6205cd572fece673da0255d74843680f67f879): > > @@ -555,8 +560,11 @@ repeat: > startstop = start_request(drive, rq); > spin_lock_irq(&hwif->lock); > > - if (startstop == ide_stopped) > + if (startstop == ide_stopped) { > + rq = hwif->rq; > + hwif->rq = NULL; > goto repeat; > + } > } else > goto plug_device; > out: > > and not zero hwif->rq if the device is blocked. > > Could you try the attached patch and see if it fixes the issue? Here is the more complete version, also taking into the account changes in ide_intr() and ide_timer_expiry(): --- drivers/ide/ide-io.c | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) Index: b/drivers/ide/ide-io.c =================================================================== --- a/drivers/ide/ide-io.c +++ b/drivers/ide/ide-io.c @@ -532,7 +532,8 @@ repeat: if (startstop == ide_stopped) { rq = hwif->rq; - hwif->rq = NULL; + if ((drive->dev_flags & IDE_DFLAG_BLOCKED) == 0) + hwif->rq = NULL; goto repeat; } } else @@ -679,8 +680,10 @@ void ide_timer_expiry (unsigned long dat spin_lock_irq(&hwif->lock); enable_irq(hwif->irq); if (startstop == ide_stopped && hwif->polling == 0) { - rq_in_flight = hwif->rq; - hwif->rq = NULL; + if ((drive->dev_flags & IDE_DFLAG_BLOCKED) == 0) { + rq_in_flight = hwif->rq; + hwif->rq = NULL; + } ide_unlock_port(hwif); plug_device = 1; } @@ -856,8 +859,10 @@ irqreturn_t ide_intr (int irq, void *dev */ if (startstop == ide_stopped && hwif->polling == 0) { BUG_ON(hwif->handler); - rq_in_flight = hwif->rq; - hwif->rq = NULL; + if ((drive->dev_flags & IDE_DFLAG_BLOCKED) == 0) { + rq_in_flight = hwif->rq; + hwif->rq = NULL; + } ide_unlock_port(hwif); plug_device = 1; } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/