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authorKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>2013-05-14 17:09:16 +0000
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-06-19 23:36:30 +0200
commitd6a77ead21b69c395ca6d09a066ededfac601bcc (patch)
tree15e6fa0166b2359f4cc7de850f62cff4538a6aa3 /drivers/acpi/sleep.c
parent7d132055814ef17a6c7b69f342244c410a5e000f (diff)
downloadlinux-d6a77ead21b69c395ca6d09a066ededfac601bcc.tar.bz2
x86 / ACPI / sleep: Provide registration for acpi_suspend_lowlevel.
Which by default will be x86_acpi_suspend_lowlevel. This registration allows us to register another callback if there is a need to use another platform specific callback. Signed-off-by: Liang Tang <liang.tang@oracle.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Tested-by: Ben Guthro <benjamin.guthro@citrix.com> Acked-by: "H. Peter Anvin" <hpa@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/sleep.c')
-rw-r--r--drivers/acpi/sleep.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c
index 9c1a435d10e6..187ab61889e6 100644
--- a/drivers/acpi/sleep.c
+++ b/drivers/acpi/sleep.c
@@ -494,6 +494,8 @@ static int acpi_suspend_enter(suspend_state_t pm_state)
break;
case ACPI_STATE_S3:
+ if (!acpi_suspend_lowlevel)
+ return -ENOSYS;
error = acpi_suspend_lowlevel();
if (error)
return error;