linux-kernel - Re: [patch] IDE: Touch NMI watchdog during resume from STR

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Date:	Fri, 14 Jul 2006 19:06:05 +0000
From:	Pavel Machek <pavel@....cz>
To:	Michal Schmidt <xschmi00@...d.feec.vutbr.cz>
Cc:	Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@...a.pw.edu.pl>,
	linux-kernel@...r.kernel.org
Subject: Re: [patch] IDE: Touch NMI watchdog during resume from STR

Hi!

> When resuming from suspend-to-RAM, the NMI watchdog 
> detects a lockup in ide_wait_not_busy.
> Here's a screenshot of the trace taken by a digital 
> camera: 
> http://www.uamt.feec.vutbr.cz/rizeni/pom/DSC03510-2.JPG
> 
> Let's touch the NMI watchdog in ide_wait_not_busy. The 
> system then resumes correctly from STR.
> 
> Signed-off-by: Michal Schmidt 
> <xschmi00@...d.feec.vutbr.cz>

ACK.

> diff --git a/drivers/ide/ide-iops.c 
> b/drivers/ide/ide-iops.c
> index 6571652..77703ac 100644
> --- a/drivers/ide/ide-iops.c
> +++ b/drivers/ide/ide-iops.c
> @@ -23,6 +23,7 @@ #include <linux/delay.h>
> #include <linux/hdreg.h>
> #include <linux/ide.h>
> #include <linux/bitops.h>
> +#include <linux/nmi.h>
> 
> #include <asm/byteorder.h>
> #include <asm/irq.h>
> @@ -1243,6 +1244,7 @@ int ide_wait_not_busy(ide_hwif_t 
> *hwif, if (stat == 0xff)
> 			return -ENODEV;
> 		touch_softlockup_watchdog();
> +		touch_nmi_watchdog();

Perhaps we need touch_all_watchdogs()?

						Pavel

-- 
Thanks for all the (sleeping) penguins.
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