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authorRafael J. Wysocki <rjw@sisk.pl>2006-11-01 13:23:14 +0100
committerLen Brown <len.brown@intel.com>2006-11-01 22:40:23 -0500
commit9185cfa92507d07ac787bc73d06c42222eec7239 (patch)
treeaffcb8c0164b79f9fa5932cd7700498560794a82 /kernel/power/disk.c
parent8b0dc866dd9b8d10a53cb3537385a51b7ee54b62 (diff)
downloadop-kernel-dev-9185cfa92507d07ac787bc73d06c42222eec7239.zip
op-kernel-dev-9185cfa92507d07ac787bc73d06c42222eec7239.tar.gz
ACPI: S4: Use "platform" rather than "shutdown" mode by default
It has been reported that on some systems the functionality after a resume from disk is limited if the system is simply powered off during the suspend instead of using the ACPI S4 suspend (aka platform mode). Unfortunately the default is currently to power off the system during the suspend so the users of these systems experience problems after the resume if they don't switch to the platform mode explicitly. This patch makes swsusp use the platform mode by default to avoid such situations. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Stefan Seyfried <seife@suse.de> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'kernel/power/disk.c')
-rw-r--r--kernel/power/disk.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/kernel/power/disk.c b/kernel/power/disk.c
index d3a158a..ae6bbc9 100644
--- a/kernel/power/disk.c
+++ b/kernel/power/disk.c
@@ -44,9 +44,11 @@ static void power_down(suspend_disk_method_t mode)
switch(mode) {
case PM_DISK_PLATFORM:
- kernel_shutdown_prepare(SYSTEM_SUSPEND_DISK);
- error = pm_ops->enter(PM_SUSPEND_DISK);
- break;
+ if (pm_ops && pm_ops->enter) {
+ kernel_shutdown_prepare(SYSTEM_SUSPEND_DISK);
+ error = pm_ops->enter(PM_SUSPEND_DISK);
+ break;
+ }
case PM_DISK_SHUTDOWN:
kernel_power_off();
break;
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