Merge branch 'nvs' into release

drivers/acpi/sleep.c

@@ -70,10 +70,10 @@ static int acpi_sleep_prepare(u32 acpi_state)
 
 	}
 	ACPI_FLUSH_CPU_CACHE();
-	acpi_enable_wakeup_device_prep(acpi_state);
 #endif
 	printk(KERN_INFO PREFIX "Preparing to enter system sleep state S%d\n",
 		acpi_state);
+	acpi_enable_wakeup_devices(acpi_state);
 	acpi_enter_sleep_state_prep(acpi_state);
 	return 0;
 }
@@ -118,6 +118,16 @@ static int acpi_pm_freeze(void)
 	return 0;
 }
 
+/**
+ * acpi_pre_suspend - Enable wakeup devices, "freeze" EC and save NVS.
+ */
+static int acpi_pm_pre_suspend(void)
+{
+	acpi_pm_freeze();
+	suspend_nvs_save();
+	return 0;
+}
+
 /**
  *	__acpi_pm_prepare - Prepare the platform to enter the target state.
  *
@@ -127,11 +137,9 @@ static int acpi_pm_freeze(void)
 static int __acpi_pm_prepare(void)
 {
 	int error = acpi_sleep_prepare(acpi_target_sleep_state);
-
-	suspend_nvs_save();
-
 	if (error)
 		acpi_target_sleep_state = ACPI_STATE_S0;
+
 	return error;
 }
 
@@ -142,9 +150,8 @@ static int __acpi_pm_prepare(void)
 static int acpi_pm_prepare(void)
 {
 	int error = __acpi_pm_prepare();
-
 	if (!error)
-		acpi_pm_freeze();
+		acpi_pm_pre_suspend();
 
 	return error;
 }
@@ -159,7 +166,6 @@ static void acpi_pm_finish(void)
 {
 	u32 acpi_state = acpi_target_sleep_state;
 
-	suspend_nvs_free();
 	acpi_ec_unblock_transactions();
 
 	if (acpi_state == ACPI_STATE_S0)
@@ -167,7 +173,7 @@ static void acpi_pm_finish(void)
 
 	printk(KERN_INFO PREFIX "Waking up from system sleep state S%d\n",
 		acpi_state);
-	acpi_disable_wakeup_device(acpi_state);
+	acpi_disable_wakeup_devices(acpi_state);
 	acpi_leave_sleep_state(acpi_state);
 
 	/* reset firmware waking vector */
@@ -181,6 +187,7 @@ static void acpi_pm_finish(void)
  */
 static void acpi_pm_end(void)
 {
+	suspend_nvs_free();
 	/*
 	 * This is necessary in case acpi_pm_finish() is not called during a
 	 * failing transition to a sleep state.
@@ -251,7 +258,6 @@ static int acpi_suspend_enter(suspend_state_t pm_state)
 	}
 
 	local_irq_save(flags);
-	acpi_enable_wakeup_device(acpi_state);
 	switch (acpi_state) {
 	case ACPI_STATE_S1:
 		barrier();
@@ -297,11 +303,6 @@ static int acpi_suspend_enter(suspend_state_t pm_state)
 	return ACPI_SUCCESS(status) ? 0 : -EFAULT;
 }
 
-static void acpi_suspend_finish(void)
-{
-	acpi_pm_finish();
-}
-
 static int acpi_suspend_state_valid(suspend_state_t pm_state)
 {
 	u32 acpi_state;
@@ -323,7 +324,7 @@ static struct platform_suspend_ops acpi_suspend_ops = {
 	.begin = acpi_suspend_begin,
 	.prepare_late = acpi_pm_prepare,
 	.enter = acpi_suspend_enter,
-	.wake = acpi_suspend_finish,
+	.wake = acpi_pm_finish,
 	.end = acpi_pm_end,
 };
 
@@ -336,9 +337,9 @@ static struct platform_suspend_ops acpi_suspend_ops = {
 static int acpi_suspend_begin_old(suspend_state_t pm_state)
 {
 	int error = acpi_suspend_begin(pm_state);
-
 	if (!error)
 		error = __acpi_pm_prepare();
+
 	return error;
 }
 
@@ -349,9 +350,9 @@ static int acpi_suspend_begin_old(suspend_state_t pm_state)
 static struct platform_suspend_ops acpi_suspend_ops_old = {
 	.valid = acpi_suspend_state_valid,
 	.begin = acpi_suspend_begin_old,
-	.prepare_late = acpi_pm_freeze,
+	.prepare_late = acpi_pm_pre_suspend,
 	.enter = acpi_suspend_enter,
-	.wake = acpi_suspend_finish,
+	.wake = acpi_pm_finish,
 	.end = acpi_pm_end,
 	.recover = acpi_pm_finish,
 };
@@ -423,16 +424,6 @@ static int acpi_hibernation_begin(void)
 	return error;
 }
 
-static int acpi_hibernation_pre_snapshot(void)
-{
-	int error = acpi_pm_prepare();
-
-	if (!error)
-		suspend_nvs_save();
-
-	return error;
-}
-
 static int acpi_hibernation_enter(void)
 {
 	acpi_status status = AE_OK;
@@ -441,7 +432,6 @@ static int acpi_hibernation_enter(void)
 	ACPI_FLUSH_CPU_CACHE();
 
 	local_irq_save(flags);
-	acpi_enable_wakeup_device(ACPI_STATE_S4);
 	/* This shouldn't return.  If it returns, we have a problem */
 	status = acpi_enter_sleep_state(ACPI_STATE_S4);
 	/* Reprogram control registers and execute _BFS */
@@ -481,7 +471,7 @@ static void acpi_pm_thaw(void)
 static struct platform_hibernation_ops acpi_hibernation_ops = {
 	.begin = acpi_hibernation_begin,
 	.end = acpi_pm_end,
-	.pre_snapshot = acpi_hibernation_pre_snapshot,
+	.pre_snapshot = acpi_pm_prepare,
 	.finish = acpi_pm_finish,
 	.prepare = acpi_pm_prepare,
 	.enter = acpi_hibernation_enter,
@@ -517,13 +507,6 @@ static int acpi_hibernation_begin_old(void)
 	return error;
 }
 
-static int acpi_hibernation_pre_snapshot_old(void)
-{
-	acpi_pm_freeze();
-	suspend_nvs_save();
-	return 0;
-}
-
 /*
  * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has
  * been requested.
@@ -531,7 +514,7 @@ static int acpi_hibernation_pre_snapshot_old(void)
 static struct platform_hibernation_ops acpi_hibernation_ops_old = {
 	.begin = acpi_hibernation_begin_old,
 	.end = acpi_pm_end,
-	.pre_snapshot = acpi_hibernation_pre_snapshot_old,
+	.pre_snapshot = acpi_pm_pre_suspend,
 	.prepare = acpi_pm_freeze,
 	.finish = acpi_pm_finish,
 	.enter = acpi_hibernation_enter,
@@ -695,7 +678,6 @@ static void acpi_power_off(void)
 	/* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */
 	printk(KERN_DEBUG "%s called\n", __func__);
 	local_irq_disable();
-	acpi_enable_wakeup_device(ACPI_STATE_S5);
 	acpi_enter_sleep_state(ACPI_STATE_S5);
 }
 

drivers/acpi/sleep.h

@@ -2,9 +2,8 @@
 extern u8 sleep_states[];
 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_enable_wakeup_devices(u8 sleep_state);
+extern void acpi_disable_wakeup_devices(u8 sleep_state);
 
 extern struct list_head acpi_wakeup_device_list;
 extern struct mutex acpi_device_lock;

drivers/acpi/wakeup.c

@@ -21,45 +21,17 @@
 ACPI_MODULE_NAME("wakeup_devices")
 
 /**
- * acpi_enable_wakeup_device_prep - Prepare wake-up devices.
+ * acpi_enable_wakeup_devices - Enable wake-up device GPEs.
  * @sleep_state: ACPI system sleep state.
  *
- * Enable all wake-up devices' power, unless the requested system sleep state is
- * too deep.
+ * Enable wakeup device power of devices with the state.enable flag set and set
+ * the wakeup enable mask bits in the GPE registers that correspond to wakeup
+ * devices.
  */
-void acpi_enable_wakeup_device_prep(u8 sleep_state)
+void acpi_enable_wakeup_devices(u8 sleep_state)
 {
 	struct list_head *node, *next;
 
-	list_for_each_safe(node, next, &acpi_wakeup_device_list) {
-		struct acpi_device *dev = container_of(node,
-						       struct acpi_device,
-						       wakeup_list);
-
-		if (!dev->wakeup.flags.valid || !dev->wakeup.state.enabled
-		    || (sleep_state > (u32) dev->wakeup.sleep_state))
-			continue;
-
-		acpi_enable_wakeup_device_power(dev, sleep_state);
-	}
-}
-
-/**
- * acpi_enable_wakeup_device - Enable wake-up device GPEs.
- * @sleep_state: ACPI system sleep state.
- *
- * Enable all wake-up devices' GPEs, with the assumption that
- * acpi_disable_all_gpes() was executed before, so we don't need to disable any
- * GPEs here.
- */
-void acpi_enable_wakeup_device(u8 sleep_state)
-{
-	struct list_head *node, *next;
-
-	/* 
-	 * Caution: this routine must be invoked when interrupt is disabled 
-	 * Refer ACPI2.0: P212
-	 */
 	list_for_each_safe(node, next, &acpi_wakeup_device_list) {
 		struct acpi_device *dev =
 			container_of(node, struct acpi_device, wakeup_list);
@@ -68,6 +40,9 @@ void acpi_enable_wakeup_device(u8 sleep_state)
 		    || sleep_state > (u32) dev->wakeup.sleep_state)
 			continue;
 
+		if (dev->wakeup.state.enabled)
+			acpi_enable_wakeup_device_power(dev, sleep_state);
+
 		/* The wake-up power should have been enabled already. */
 		acpi_enable_gpe(dev->wakeup.gpe_device, dev->wakeup.gpe_number,
 				ACPI_GPE_TYPE_WAKE);
@@ -75,13 +50,10 @@ void acpi_enable_wakeup_device(u8 sleep_state)
 }
 
 /**
- * acpi_disable_wakeup_device - Disable devices' wakeup capability.
+ * acpi_disable_wakeup_devices - Disable devices' wakeup capability.
  * @sleep_state: ACPI system sleep state.
- *
- * This function only affects devices with wakeup.state.enabled set, which means
- * that it reverses the changes made by acpi_enable_wakeup_device_prep().
  */
-void acpi_disable_wakeup_device(u8 sleep_state)
+void acpi_disable_wakeup_devices(u8 sleep_state)
 {
 	struct list_head *node, *next;