Merge branch 'acpi-cleanup'

* acpi-cleanup: (21 commits)
  ACPI / dock: fix error return code in dock_add()
  ACPI / dock: Drop unnecessary local variable from dock_add()
  ACPI / dock / PCI: Drop ACPI dock notifier chain
  ACPI / dock: Do not check CONFIG_ACPI_DOCK_MODULE
  ACPI / dock: Do not leak memory on falilures to add a dock station
  ACPI: Drop ACPI bus notifier call chain
  ACPI / dock: Rework the handling of notifications
  ACPI / dock: Simplify dock_init_hotplug() and dock_release_hotplug()
  ACPI / dock: Walk list in reverse order during removal of devices
  ACPI / dock: Rework and simplify find_dock_devices()
  ACPI / dock: Drop the hp_lock mutex from struct dock_station
  ACPI: simplify acpiphp driver with new helper functions
  ACPI: simplify dock driver with new helper functions
  ACPI: Export acpi_(bay)|(dock)_match() from scan.c
  ACPI: introduce two helper functions for _EJ0 and _LCK
  ACPI: introduce helper function acpi_execute_simple_method()
  ACPI: introduce helper function acpi_has_method()
  ACPI / dock: simplify dock_create_acpi_device()
  ACPI / dock: mark initialization functions with __init
  ACPI / dock: drop redundant spin lock in dock station object
  ...

1 files changed, 63 insertions, 126 deletions

diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 8a46c924effd..d5993e339a26 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -193,9 +193,6 @@ static acpi_status acpi_bus_online_companions(acpi_handle handle, u32 lvl,
 static int acpi_scan_hot_remove(struct acpi_device *device)
 {
 	acpi_handle handle = device->handle;
-	acpi_handle not_used;
-	struct acpi_object_list arg_list;
-	union acpi_object arg;
 	struct device *errdev;
 	acpi_status status;
 	unsigned long long sta;
@@ -258,32 +255,15 @@ static int acpi_scan_hot_remove(struct acpi_device *device)
 	put_device(&device->dev);
 	device = NULL;
 
-	if (ACPI_SUCCESS(acpi_get_handle(handle, "_LCK", &not_used))) {
-		arg_list.count = 1;
-		arg_list.pointer = &arg;
-		arg.type = ACPI_TYPE_INTEGER;
-		arg.integer.value = 0;
-		acpi_evaluate_object(handle, "_LCK", &arg_list, NULL);
-	}
-
-	arg_list.count = 1;
-	arg_list.pointer = &arg;
-	arg.type = ACPI_TYPE_INTEGER;
-	arg.integer.value = 1;
-
+	acpi_evaluate_lck(handle, 0);
 	/*
 	 * TBD: _EJD support.
 	 */
-	status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL);
-	if (ACPI_FAILURE(status)) {
-		if (status == AE_NOT_FOUND) {
-			return -ENODEV;
-		} else {
-			acpi_handle_warn(handle, "Eject failed (0x%x)\n",
-								status);
-			return -EIO;
-		}
-	}
+	status = acpi_evaluate_ej0(handle);
+	if (status == AE_NOT_FOUND)
+		return -ENODEV;
+	else if (ACPI_FAILURE(status))
+		return -EIO;
 
 	/*
 	 * Verify if eject was indeed successful.  If not, log an error
@@ -654,7 +634,6 @@ static int acpi_device_setup_files(struct acpi_device *dev)
 {
 	struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
 	acpi_status status;
-	acpi_handle temp;
 	unsigned long long sun;
 	int result = 0;
 
@@ -680,8 +659,7 @@ static int acpi_device_setup_files(struct acpi_device *dev)
 	/*
 	 * If device has _STR, 'description' file is created
 	 */
-	status = acpi_get_handle(dev->handle, "_STR", &temp);
-	if (ACPI_SUCCESS(status)) {
+	if (acpi_has_method(dev->handle, "_STR")) {
 		status = acpi_evaluate_object(dev->handle, "_STR",
 					NULL, &buffer);
 		if (ACPI_FAILURE(status))
@@ -711,8 +689,7 @@ static int acpi_device_setup_files(struct acpi_device *dev)
          * If device has _EJ0, 'eject' file is created that is used to trigger
          * hot-removal function from userland.
          */
-	status = acpi_get_handle(dev->handle, "_EJ0", &temp);
-	if (ACPI_SUCCESS(status)) {
+	if (acpi_has_method(dev->handle, "_EJ0")) {
 		result = device_create_file(&dev->dev, &dev_attr_eject);
 		if (result)
 			return result;
@@ -734,9 +711,6 @@ end:
 
 static void acpi_device_remove_files(struct acpi_device *dev)
 {
-	acpi_status status;
-	acpi_handle temp;
-
 	if (dev->flags.power_manageable) {
 		device_remove_file(&dev->dev, &dev_attr_power_state);
 		if (dev->power.flags.power_resources)
@@ -747,20 +721,17 @@ static void acpi_device_remove_files(struct acpi_device *dev)
 	/*
 	 * If device has _STR, remove 'description' file
 	 */
-	status = acpi_get_handle(dev->handle, "_STR", &temp);
-	if (ACPI_SUCCESS(status)) {
+	if (acpi_has_method(dev->handle, "_STR")) {
 		kfree(dev->pnp.str_obj);
 		device_remove_file(&dev->dev, &dev_attr_description);
 	}
 	/*
 	 * If device has _EJ0, remove 'eject' file.
 	 */
-	status = acpi_get_handle(dev->handle, "_EJ0", &temp);
-	if (ACPI_SUCCESS(status))
+	if (acpi_has_method(dev->handle, "_EJ0"))
 		device_remove_file(&dev->dev, &dev_attr_eject);
 
-	status = acpi_get_handle(dev->handle, "_SUN", &temp);
-	if (ACPI_SUCCESS(status))
+	if (acpi_has_method(dev->handle, "_SUN"))
 		device_remove_file(&dev->dev, &dev_attr_sun);
 
 	if (dev->pnp.unique_id)
@@ -1336,13 +1307,10 @@ static void acpi_bus_set_run_wake_flags(struct acpi_device *device)
 
 static void acpi_bus_get_wakeup_device_flags(struct acpi_device *device)
 {
-	acpi_handle temp;
-	acpi_status status = 0;
 	int err;
 
 	/* Presence of _PRW indicates wake capable */
-	status = acpi_get_handle(device->handle, "_PRW", &temp);
-	if (ACPI_FAILURE(status))
+	if (!acpi_has_method(device->handle, "_PRW"))
 		return;
 
 	err = acpi_bus_extract_wakeup_device_power_package(device->handle,
@@ -1372,7 +1340,6 @@ static void acpi_bus_init_power_state(struct acpi_device *device, int state)
 	struct acpi_device_power_state *ps = &device->power.states[state];
 	char pathname[5] = { '_', 'P', 'R', '0' + state, '\0' };
 	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
-	acpi_handle handle;
 	acpi_status status;
 
 	INIT_LIST_HEAD(&ps->resources);
@@ -1395,8 +1362,7 @@ static void acpi_bus_init_power_state(struct acpi_device *device, int state)
 
 	/* Evaluate "_PSx" to see if we can do explicit sets */
 	pathname[2] = 'S';
-	status = acpi_get_handle(device->handle, pathname, &handle);
-	if (ACPI_SUCCESS(status))
+	if (acpi_has_method(device->handle, pathname))
 		ps->flags.explicit_set = 1;
 
 	/*
@@ -1415,28 +1381,21 @@ static void acpi_bus_init_power_state(struct acpi_device *device, int state)
 
 static void acpi_bus_get_power_flags(struct acpi_device *device)
 {
-	acpi_status status;
-	acpi_handle handle;
 	u32 i;
 
 	/* Presence of _PS0|_PR0 indicates 'power manageable' */
-	status = acpi_get_handle(device->handle, "_PS0", &handle);
-	if (ACPI_FAILURE(status)) {
-		status = acpi_get_handle(device->handle, "_PR0", &handle);
-		if (ACPI_FAILURE(status))
-			return;
-	}
+	if (!acpi_has_method(device->handle, "_PS0") &&
+	    !acpi_has_method(device->handle, "_PR0"))
+		return;
 
 	device->flags.power_manageable = 1;
 
 	/*
 	 * Power Management Flags
 	 */
-	status = acpi_get_handle(device->handle, "_PSC", &handle);
-	if (ACPI_SUCCESS(status))
+	if (acpi_has_method(device->handle, "_PSC"))
 		device->power.flags.explicit_get = 1;
-	status = acpi_get_handle(device->handle, "_IRC", &handle);
-	if (ACPI_SUCCESS(status))
+	if (acpi_has_method(device->handle, "_IRC"))
 		device->power.flags.inrush_current = 1;
 
 	/*
@@ -1470,28 +1429,18 @@ static void acpi_bus_get_power_flags(struct acpi_device *device)
 
 static void acpi_bus_get_flags(struct acpi_device *device)
 {
-	acpi_status status = AE_OK;
-	acpi_handle temp = NULL;
-
 	/* Presence of _STA indicates 'dynamic_status' */
-	status = acpi_get_handle(device->handle, "_STA", &temp);
-	if (ACPI_SUCCESS(status))
+	if (acpi_has_method(device->handle, "_STA"))
 		device->flags.dynamic_status = 1;
 
 	/* Presence of _RMV indicates 'removable' */
-	status = acpi_get_handle(device->handle, "_RMV", &temp);
-	if (ACPI_SUCCESS(status))
+	if (acpi_has_method(device->handle, "_RMV"))
 		device->flags.removable = 1;
 
 	/* Presence of _EJD|_EJ0 indicates 'ejectable' */
-	status = acpi_get_handle(device->handle, "_EJD", &temp);
-	if (ACPI_SUCCESS(status))
+	if (acpi_has_method(device->handle, "_EJD") ||
+	    acpi_has_method(device->handle, "_EJ0"))
 		device->flags.ejectable = 1;
-	else {
-		status = acpi_get_handle(device->handle, "_EJ0", &temp);
-		if (ACPI_SUCCESS(status))
-			device->flags.ejectable = 1;
-	}
 }
 
 static void acpi_device_get_busid(struct acpi_device *device)
@@ -1533,46 +1482,45 @@ static void acpi_device_get_busid(struct acpi_device *device)
 }
 
 /*
+ * acpi_ata_match - see if an acpi object is an ATA device
+ *
+ * If an acpi object has one of the ACPI ATA methods defined,
+ * then we can safely call it an ATA device.
+ */
+bool acpi_ata_match(acpi_handle handle)
+{
+	return acpi_has_method(handle, "_GTF") ||
+	       acpi_has_method(handle, "_GTM") ||
+	       acpi_has_method(handle, "_STM") ||
+	       acpi_has_method(handle, "_SDD");
+}
+
+/*
  * acpi_bay_match - see if an acpi object is an ejectable driver bay
  *
  * If an acpi object is ejectable and has one of the ACPI ATA methods defined,
  * then we can safely call it an ejectable drive bay
  */
-static int acpi_bay_match(acpi_handle handle)
+bool acpi_bay_match(acpi_handle handle)
 {
-	acpi_status status;
-	acpi_handle tmp;
 	acpi_handle phandle;
 
-	status = acpi_get_handle(handle, "_EJ0", &tmp);
-	if (ACPI_FAILURE(status))
-		return -ENODEV;
-
-	if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) ||
-		(ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) ||
-		(ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) ||
-		(ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp))))
-		return 0;
-
-	if (acpi_get_parent(handle, &phandle))
-		return -ENODEV;
+	if (!acpi_has_method(handle, "_EJ0"))
+		return false;
+	if (acpi_ata_match(handle))
+		return true;
+	if (ACPI_FAILURE(acpi_get_parent(handle, &phandle)))
+		return false;
 
-        if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) ||
-                (ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) ||
-                (ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) ||
-                (ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp))))
-                return 0;
-
-	return -ENODEV;
+	return acpi_ata_match(phandle);
 }
 
 /*
  * acpi_dock_match - see if an acpi object has a _DCK method
  */
-static int acpi_dock_match(acpi_handle handle)
+bool acpi_dock_match(acpi_handle handle)
 {
-	acpi_handle tmp;
-	return acpi_get_handle(handle, "_DCK", &tmp);
+	return acpi_has_method(handle, "_DCK");
 }
 
 const char *acpi_device_hid(struct acpi_device *device)
@@ -1610,34 +1558,26 @@ static void acpi_add_id(struct acpi_device_pnp *pnp, const char *dev_id)
  * lacks the SMBUS01 HID and the methods do not have the necessary "_"
  * prefix.  Work around this.
  */
-static int acpi_ibm_smbus_match(acpi_handle handle)
+static bool acpi_ibm_smbus_match(acpi_handle handle)
 {
-	acpi_handle h_dummy;
-	struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL};
-	int result;
+	char node_name[ACPI_PATH_SEGMENT_LENGTH];
+	struct acpi_buffer path = { sizeof(node_name), node_name };
 
 	if (!dmi_name_in_vendors("IBM"))
-		return -ENODEV;
+		return false;
 
 	/* Look for SMBS object */
-	result = acpi_get_name(handle, ACPI_SINGLE_NAME, &path);
-	if (result)
-		return result;
-
-	if (strcmp("SMBS", path.pointer)) {
-		result = -ENODEV;
-		goto out;
-	}
+	if (ACPI_FAILURE(acpi_get_name(handle, ACPI_SINGLE_NAME, &path)) ||
+	    strcmp("SMBS", path.pointer))
+		return false;
 
 	/* Does it have the necessary (but misnamed) methods? */
-	result = -ENODEV;
-	if (ACPI_SUCCESS(acpi_get_handle(handle, "SBI", &h_dummy)) &&
-	    ACPI_SUCCESS(acpi_get_handle(handle, "SBR", &h_dummy)) &&
-	    ACPI_SUCCESS(acpi_get_handle(handle, "SBW", &h_dummy)))
-		result = 0;
-out:
-	kfree(path.pointer);
-	return result;
+	if (acpi_has_method(handle, "SBI") &&
+	    acpi_has_method(handle, "SBR") &&
+	    acpi_has_method(handle, "SBW"))
+		return true;
+
+	return false;
 }
 
 static void acpi_set_pnp_ids(acpi_handle handle, struct acpi_device_pnp *pnp,
@@ -1685,11 +1625,11 @@ static void acpi_set_pnp_ids(acpi_handle handle, struct acpi_device_pnp *pnp,
 		 */
 		if (acpi_is_video_device(handle))
 			acpi_add_id(pnp, ACPI_VIDEO_HID);
-		else if (ACPI_SUCCESS(acpi_bay_match(handle)))
+		else if (acpi_bay_match(handle))
 			acpi_add_id(pnp, ACPI_BAY_HID);
-		else if (ACPI_SUCCESS(acpi_dock_match(handle)))
+		else if (acpi_dock_match(handle))
 			acpi_add_id(pnp, ACPI_DOCK_HID);
-		else if (!acpi_ibm_smbus_match(handle))
+		else if (acpi_ibm_smbus_match(handle))
 			acpi_add_id(pnp, ACPI_SMBUS_IBM_HID);
 		else if (list_empty(&pnp->ids) && handle == ACPI_ROOT_OBJECT) {
 			acpi_add_id(pnp, ACPI_BUS_HID); /* \_SB, LNXSYBUS */
@@ -1900,7 +1840,6 @@ static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used,
 	struct acpi_device *device = NULL;
 	int type;
 	unsigned long long sta;
-	acpi_status status;
 	int result;
 
 	acpi_bus_get_device(handle, &device);
@@ -1921,10 +1860,8 @@ static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used,
 	if (!(sta & ACPI_STA_DEVICE_PRESENT) &&
 	    !(sta & ACPI_STA_DEVICE_FUNCTIONING)) {
 		struct acpi_device_wakeup wakeup;
-		acpi_handle temp;
 
-		status = acpi_get_handle(handle, "_PRW", &temp);
-		if (ACPI_SUCCESS(status)) {
+		if (acpi_has_method(handle, "_PRW")) {
 			acpi_bus_extract_wakeup_device_power_package(handle,
 								     &wakeup);
 			acpi_power_resources_list_free(&wakeup.resources);