7 files changed, 55 insertions, 45 deletions

diff --git a/drivers/acpi/acpica/hwsleep.c b/drivers/acpi/acpica/hwsleep.c
index db307a3..cc22f9a 100644
--- a/drivers/acpi/acpica/hwsleep.c
+++ b/drivers/acpi/acpica/hwsleep.c
@@ -45,6 +45,7 @@
 #include <acpi/acpi.h>
 #include "accommon.h"
 #include "actables.h"
+#include <linux/tboot.h>
 
 #define _COMPONENT          ACPI_HARDWARE
 ACPI_MODULE_NAME("hwsleep")
@@ -342,6 +343,8 @@ acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state)
 
 	ACPI_FLUSH_CPU_CACHE();
 
+	tboot_sleep(sleep_state, pm1a_control, pm1b_control);
+
 	/* Write #2: Write both SLP_TYP + SLP_EN */
 
 	status = acpi_hw_write_pm1_control(pm1a_control, pm1b_control);
diff --git a/drivers/acpi/blacklist.c b/drivers/acpi/blacklist.c
index f6baa77..0c4ca4d 100644
--- a/drivers/acpi/blacklist.c
+++ b/drivers/acpi/blacklist.c
@@ -78,9 +78,10 @@ static struct acpi_blacklist_item acpi_blacklist[] __initdata = {
 
 static int __init blacklist_by_year(void)
 {
-	int year = dmi_get_year(DMI_BIOS_DATE);
+	int year;
+
 	/* Doesn't exist? Likely an old system */
-	if (year == -1) {
+	if (!dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL)) {
 		printk(KERN_ERR PREFIX "no DMI BIOS year, "
 			"acpi=force is required to enable ACPI\n" );
 		return 1;
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index 55b5b90..31b961c 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -61,20 +61,6 @@ static struct acpi_driver acpi_pci_root_driver = {
 		},
 };
 
-struct acpi_pci_root {
-	struct list_head node;
-	struct acpi_device *device;
-	struct pci_bus *bus;
-	u16 segment;
-	u8 bus_nr;
-
-	u32 osc_support_set;	/* _OSC state of support bits */
-	u32 osc_control_set;	/* _OSC state of control bits */
-	u32 osc_control_qry;	/* the latest _OSC query result */
-
-	u32 osc_queried:1;	/* has _OSC control been queried? */
-};
-
 static LIST_HEAD(acpi_pci_roots);
 
 static struct acpi_pci_driver *sub_driver;
@@ -317,7 +303,7 @@ static acpi_status acpi_pci_osc_support(struct acpi_pci_root *root, u32 flags)
 	return status;
 }
 
-static struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle)
+struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle)
 {
 	struct acpi_pci_root *root;
 
@@ -327,6 +313,7 @@ static struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle)
 	}
 	return NULL;
 }
+EXPORT_SYMBOL_GPL(acpi_pci_find_root);
 
 struct acpi_handle_node {
 	struct list_head node;
diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c
index d74365d..5a09bf3 100644
--- a/drivers/acpi/power.c
+++ b/drivers/acpi/power.c
@@ -44,6 +44,8 @@
 #include <acpi/acpi_bus.h>
 #include <acpi/acpi_drivers.h>
 
+#include "sleep.h"
+
 #define _COMPONENT			ACPI_POWER_COMPONENT
 ACPI_MODULE_NAME("power");
 #define ACPI_POWER_CLASS		"power_resource"
@@ -361,17 +363,15 @@ int acpi_device_sleep_wake(struct acpi_device *dev,
  */
 int acpi_enable_wakeup_device_power(struct acpi_device *dev, int sleep_state)
 {
-	int i, err;
+	int i, err = 0;
 
 	if (!dev || !dev->wakeup.flags.valid)
 		return -EINVAL;
 
-	/*
-	 * Do not execute the code below twice in a row without calling
-	 * acpi_disable_wakeup_device_power() in between for the same device
-	 */
-	if (dev->wakeup.flags.prepared)
-		return 0;
+	mutex_lock(&acpi_device_lock);
+
+	if (dev->wakeup.prepare_count++)
+		goto out;
 
 	/* Open power resource */
 	for (i = 0; i < dev->wakeup.resources.count; i++) {
@@ -379,7 +379,8 @@ int acpi_enable_wakeup_device_power(struct acpi_device *dev, int sleep_state)
 		if (ret) {
 			printk(KERN_ERR PREFIX "Transition power state\n");
 			dev->wakeup.flags.valid = 0;
-			return -ENODEV;
+			err = -ENODEV;
+			goto err_out;
 		}
 	}
 
@@ -388,9 +389,13 @@ int acpi_enable_wakeup_device_power(struct acpi_device *dev, int sleep_state)
 	 * in arbitrary power state afterwards.
 	 */
 	err = acpi_device_sleep_wake(dev, 1, sleep_state, 3);
-	if (!err)
-		dev->wakeup.flags.prepared = 1;
 
+ err_out:
+	if (err)
+		dev->wakeup.prepare_count = 0;
+
+ out:
+	mutex_unlock(&acpi_device_lock);
 	return err;
 }
 
@@ -402,35 +407,42 @@ int acpi_enable_wakeup_device_power(struct acpi_device *dev, int sleep_state)
  */
 int acpi_disable_wakeup_device_power(struct acpi_device *dev)
 {
-	int i, ret;
+	int i, err = 0;
 
 	if (!dev || !dev->wakeup.flags.valid)
 		return -EINVAL;
 
+	mutex_lock(&acpi_device_lock);
+
+	if (--dev->wakeup.prepare_count > 0)
+		goto out;
+
 	/*
-	 * Do not execute the code below twice in a row without calling
-	 * acpi_enable_wakeup_device_power() in between for the same device
+	 * Executing the code below even if prepare_count is already zero when
+	 * the function is called may be useful, for example for initialisation.
 	 */
-	if (!dev->wakeup.flags.prepared)
-		return 0;
+	if (dev->wakeup.prepare_count < 0)
+		dev->wakeup.prepare_count = 0;
 
-	dev->wakeup.flags.prepared = 0;
-
-	ret = acpi_device_sleep_wake(dev, 0, 0, 0);
-	if (ret)
-		return ret;
+	err = acpi_device_sleep_wake(dev, 0, 0, 0);
+	if (err)
+		goto out;
 
 	/* Close power resource */
 	for (i = 0; i < dev->wakeup.resources.count; i++) {
-		ret = acpi_power_off_device(dev->wakeup.resources.handles[i], dev);
+		int ret = acpi_power_off_device(
+				dev->wakeup.resources.handles[i], dev);
 		if (ret) {
 			printk(KERN_ERR PREFIX "Transition power state\n");
 			dev->wakeup.flags.valid = 0;
-			return -ENODEV;
+			err = -ENODEV;
+			goto out;
 		}
 	}
 
-	return ret;
+ out:
+	mutex_unlock(&acpi_device_lock);
+	return err;
 }
 
 /* --------------------------------------------------------------------------
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 5dd702c..5699d97 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -781,6 +781,7 @@ static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device)
 	kfree(buffer.pointer);
 
 	device->wakeup.flags.valid = 1;
+	device->wakeup.prepare_count = 0;
 	/* Call _PSW/_DSW object to disable its ability to wake the sleeping
 	 * system for the ACPI device with the _PRW object.
 	 * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW.
diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c
index e0a7409..a90afcc 100644
--- a/drivers/acpi/sleep.c
+++ b/drivers/acpi/sleep.c
@@ -697,19 +697,25 @@ int acpi_pm_device_sleep_wake(struct device *dev, bool enable)
 {
 	acpi_handle handle;
 	struct acpi_device *adev;
+	int error;
 
-	if (!device_may_wakeup(dev))
+	if (!device_can_wakeup(dev))
 		return -EINVAL;
 
 	handle = DEVICE_ACPI_HANDLE(dev);
 	if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) {
-		printk(KERN_DEBUG "ACPI handle has no context!\n");
+		dev_dbg(dev, "ACPI handle has no context in %s!\n", __func__);
 		return -ENODEV;
 	}
 
-	return enable ?
+	error = enable ?
 		acpi_enable_wakeup_device_power(adev, acpi_target_sleep_state) :
 		acpi_disable_wakeup_device_power(adev);
+	if (!error)
+		dev_info(dev, "wake-up capability %s by ACPI\n",
+				enable ? "enabled" : "disabled");
+
+	return error;
 }
 #endif
 
diff --git a/drivers/acpi/wakeup.c b/drivers/acpi/wakeup.c
index 88725dc..e0ee0c0 100644
--- a/drivers/acpi/wakeup.c
+++ b/drivers/acpi/wakeup.c
@@ -68,7 +68,7 @@ void acpi_enable_wakeup_device(u8 sleep_state)
 		/* If users want to disable run-wake GPE,
 		 * we only disable it for wake and leave it for runtime
 		 */
-		if ((!dev->wakeup.state.enabled && !dev->wakeup.flags.prepared)
+		if ((!dev->wakeup.state.enabled && !dev->wakeup.prepare_count)
 		    || sleep_state > (u32) dev->wakeup.sleep_state) {
 			if (dev->wakeup.flags.run_wake) {
 				/* set_gpe_type will disable GPE, leave it like that */
@@ -100,7 +100,7 @@ void acpi_disable_wakeup_device(u8 sleep_state)
 		if (!dev->wakeup.flags.valid)
 			continue;
 
-		if ((!dev->wakeup.state.enabled && !dev->wakeup.flags.prepared)
+		if ((!dev->wakeup.state.enabled && !dev->wakeup.prepare_count)
 		    || sleep_state > (u32) dev->wakeup.sleep_state) {
 			if (dev->wakeup.flags.run_wake) {
 				acpi_set_gpe_type(dev->wakeup.gpe_device,