[ACPI] fix reboot upon suspend-to-disk

http://bugzilla.kernel.org/show_bug.cgi?id=4320

Signed-off-by: Alexey Starikovskiy <alexey.y.starikovskiy@intel.com>
Acked-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: Len Brown <len.brown@intel.com>

3 files changed, 13 insertions, 10 deletions

diff --git a/drivers/acpi/sleep/poweroff.c b/drivers/acpi/sleep/poweroff.c
index af7935a95bcc..47fb4b394eec 100644
--- a/drivers/acpi/sleep/poweroff.c
+++ b/drivers/acpi/sleep/poweroff.c
@@ -33,9 +33,7 @@ int acpi_sleep_prepare(u32 acpi_state)
         ACPI_FLUSH_CPU_CACHE();
         acpi_enable_wakeup_device_prep(acpi_state);
 #endif
-        if (acpi_state == ACPI_STATE_S5) {
-                acpi_wakeup_gpe_poweroff_prepare();
-        }
+        acpi_gpe_sleep_prepare(acpi_state);
         acpi_enter_sleep_state_prep(acpi_state);
         return 0;
 }
@@ -53,11 +51,16 @@ void acpi_power_off(void)
 
 static int acpi_shutdown(struct sys_device *x)
 {
-        if (system_state == SYSTEM_POWER_OFF) {
-                /* Prepare if we are going to power off the system */
+        switch (system_state) {
+        case SYSTEM_POWER_OFF:
+                /* Prepare to power off the system */
                 return acpi_sleep_prepare(ACPI_STATE_S5);
+        case SYSTEM_SUSPEND_DISK:
+                /* Prepare to suspend the system to disk */
+                return acpi_sleep_prepare(ACPI_STATE_S4);
+        default:
+                return 0;
         }
-        return 0;
 }
 
 static struct sysdev_class acpi_sysclass = {
diff --git a/drivers/acpi/sleep/sleep.h b/drivers/acpi/sleep/sleep.h
index efd0001c6f05..f3e70397a7d6 100644
--- a/drivers/acpi/sleep/sleep.h
+++ b/drivers/acpi/sleep/sleep.h
@@ -5,4 +5,4 @@ extern int acpi_suspend (u32 state);
 extern void acpi_enable_wakeup_device_prep(u8 sleep_state);
 extern void acpi_enable_wakeup_device(u8 sleep_state);
 extern void acpi_disable_wakeup_device(u8 sleep_state);
-extern void acpi_wakeup_gpe_poweroff_prepare(void);
+extern void acpi_gpe_sleep_prepare(u32 sleep_state);
diff --git a/drivers/acpi/sleep/wakeup.c b/drivers/acpi/sleep/wakeup.c
index 4134ed43d026..85df0ceda2a9 100644
--- a/drivers/acpi/sleep/wakeup.c
+++ b/drivers/acpi/sleep/wakeup.c
@@ -192,7 +192,7 @@ late_initcall(acpi_wakeup_device_init);
  * RUNTIME GPEs, we simply mark all GPES that
  * are not enabled for wakeup from S5 as RUNTIME.
  */
-void acpi_wakeup_gpe_poweroff_prepare(void)
+void acpi_gpe_sleep_prepare(u32 sleep_state)
 {
         struct list_head *node, *next;
 
@@ -201,8 +201,8 @@ void acpi_wakeup_gpe_poweroff_prepare(void)
                                                        struct acpi_device,
                                                        wakeup_list);
 
-                /* The GPE can wakeup system from S5, don't touch it */
-                if ((u32) dev->wakeup.sleep_state == ACPI_STATE_S5)
+                /* The GPE can wakeup system from this state, don't touch it */
+                if ((u32) dev->wakeup.sleep_state >= sleep_state)
                         continue;
                 /* acpi_set_gpe_type will automatically disable GPE */
                 acpi_set_gpe_type(dev->wakeup.gpe_device,