lkml.org 
[lkml]   [2007]   [Sep]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH -mm] Hibernation: Check if ACPI is enabled during restore in the right place
On Sun 2007-09-02 00:21:37, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rjw@sisk.pl>
>
> The following scenario leads to total confusion of the platform firmware on
> some boxes (eg. HPC nx6325):
> * Hibernate with ACPI enabled
> * Pass "acpi=off" to the boot kernel
>
> To prevent this from happening it's necessary to check if ACPI is enabled (and
> enable it if that's not the case) _right_ _after_ control has been transfered
> from the boot kernel to the image kernel, before device_power_up() is called
> (ie. with interrupts disabled).  Enabling ACPI after calling device_power_up()
> turns out to be insufficient.
>
> For this reason, introduce new hibernation callback ->leave() that will be
> executed before device_power_up() by the restored image kernel.  To make it
> work, it also is necessary to move swsusp_suspend() from swsusp.c to disk.c
> (it's name is changed to "create_image", which is more up to the point).
>
> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>

ACK.

--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
-
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/

\
 
 \ /
  Last update: 2007-09-06 11:03    [W:0.027 / U:3.292 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site