linux-kernel - Re: [linux-pm] [2.6.30-rc1-git2 regressions] Hibernation broken and (minor but annoying) audio problem

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Date:	Sun, 12 Apr 2009 11:27:36 -0700
From:	Arjan van de Ven <arjan@...ux.intel.com>
To:	"Rafael J. Wysocki" <rjw@...e.com>
CC:	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-pm@...ts.linux-foundation.org, Takashi Iwai <tiwai@...e.de>,
	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: [linux-pm] [2.6.30-rc1-git2 regressions] Hibernation broken and
 (minor but annoying) audio problem

Rafael J. Wysocki wrote:
> 
> OK, updated patch follows, with a changelog.
> 
> I've added this check to user.c too, because that code can be called
> independently of the one in disk.c .  Also, if resume is user space-driven,
> it's a good idea to wait for all of the device probes to complete before
> continuing.
> 
> Thanks,
> Rafael
> 
> ---
> From: Rafael J. Wysocki <rjw@...k.pl>
> Subject: PM/Hibernate: Wait for SCSI devices scan to complete during resume
> 
> There is a race between resume from hibernation and the asynchronous
> scanning of SCSI devices and to prevent it from happening we need to
> call scsi_complete_async_scans() during resume from hibernation.
> 
> In addition, if the resume from hibernation is userland-driven, it's
> better to wait for all device probes in the kernel to complete before
> attempting to open the resume device.
> 
> Signed-off-by: Rafael J. Wysocki <rjw@...k.pl>

looks like a good fix to me (regardless of the async stuff)

Acked-by: Arjan van de Ven <arjan@...ux.intel.com>
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