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linux-sg2042
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[PATCH] swsusp: fix platform mode 

At some point after 2.6.13, in-kernel software suspend got "incomplete" for
the so-called "platform" mode.  pm_ops->prepare() is never called.  A
visible sign of this is the "moon" light on thinkpads not flashing during
suspend.  Fix by readding the pm_ops->prepare call during suspend.

Signed-off-by: Stefan Seyfried <seife@suse.de>
Acked-by: "Rafael J. Wysocki" <rjw@sisk.pl>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Stefan Seyfried 2006-12-06 20:34:21 -08:00 committed by Linus Torvalds
parent 8594912187
commit 8a05aac263
1 changed files with 22 additions and 0 deletions
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22
kernel/power/disk.c
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@ -29,6 +29,22 @@ char resume_file[256] = CONFIG_PM_STD_PARTITION;
dev_t swsusp_resume_device;
sector_t swsusp_resume_block;
/**
* platform_prepare - prepare the machine for hibernation using the
* platform driver if so configured and return an error code if it fails
*/
static inline int platform_prepare(void)
{
int error = 0;
if (pm_disk_mode == PM_DISK_PLATFORM) {
if (pm_ops && pm_ops->prepare)
error = pm_ops->prepare(PM_SUSPEND_DISK);
}
return error;
}
/**
* power_down - Shut machine down for hibernate.
* @mode: Suspend-to-disk mode
@ -91,9 +107,15 @@ static int prepare_processes(void)
goto thaw;
}
error = platform_prepare();
if (error)
goto thaw;
/* Free memory before shutting down devices. */
if (!(error = swsusp_shrink_memory()))
return 0;
platform_finish();
thaw:
thaw_processes();
enable_cpus: