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authorStefan Seyfried <seife@suse.de>2006-12-06 20:34:06 -0800
committerLinus Torvalds <torvalds@woody.osdl.org>2006-12-07 08:39:26 -0800
commit3592695c363c3f3119621bdcf5ed852d6b9d1a5c (patch)
treebdc238af4d044ce822d88e5d18e6cf284b433728 /kernel/power/user.c
parent074cec54d1049ab580ecd0026623b553e0e270c4 (diff)
[PATCH] uswsusp: add pmops->{prepare,enter,finish} support (aka "platform mode")
Add an ioctl to the userspace swsusp code that enables the usage of the pmops->prepare, pmops->enter and pmops->finish methods (the in-kernel suspend knows these as "platform method"). These are needed on many machines to (among others) speed up resuming by letting the BIOS skip some steps or let my hp nx5000 recognise the correct ac_adapter state after resume again. It also ensures on many machines, that changed hardware (unplugged AC adapters) gets correctly detected and that kacpid does not run wild after resume. Signed-off-by: Stefan Seyfried <seife@suse.de> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: Pavel Machek <pavel@ucw.cz> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel/power/user.c')
-rw-r--r--kernel/power/user.c28
1 files changed, 28 insertions, 0 deletions
diff --git a/kernel/power/user.c b/kernel/power/user.c
index d991d3b0e5a..4c24ca5d62e 100644
--- a/kernel/power/user.c
+++ b/kernel/power/user.c
@@ -11,6 +11,7 @@
#include <linux/suspend.h>
#include <linux/syscalls.h>
+#include <linux/reboot.h>
#include <linux/string.h>
#include <linux/device.h>
#include <linux/miscdevice.h>
@@ -313,6 +314,33 @@ OutS3:
up(&pm_sem);
break;
+ case SNAPSHOT_PMOPS:
+ switch (arg) {
+
+ case PMOPS_PREPARE:
+ if (pm_ops->prepare) {
+ error = pm_ops->prepare(PM_SUSPEND_DISK);
+ }
+ break;
+
+ case PMOPS_ENTER:
+ kernel_shutdown_prepare(SYSTEM_SUSPEND_DISK);
+ error = pm_ops->enter(PM_SUSPEND_DISK);
+ break;
+
+ case PMOPS_FINISH:
+ if (pm_ops && pm_ops->finish) {
+ pm_ops->finish(PM_SUSPEND_DISK);
+ }
+ break;
+
+ default:
+ printk(KERN_ERR "SNAPSHOT_PMOPS: invalid argument %ld\n", arg);
+ error = -EINVAL;
+
+ }
+ break;
+
default:
error = -ENOTTY;