ACPI / PM: Use ACPI_COMPANION() to get ACPI companions of devices
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Message ID 3698474.jasU9n7YCg@vostro.rjw.lan
State New, archived
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  • ACPI / PM: Use ACPI_COMPANION() to get ACPI companions of devices
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Commit Message

Rafael J. Wysocki Jan. 19, 2014, 3:38 p.m. UTC
From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

The ACPI device PM code in device_pm.c uses a special function,
acpi_dev_pm_get_node(), to obtain an ACPI companion object of a given
device.  However, that is not necessary any more after recent changes
that introduced the ACPI_COMPANION() macro serving exactly the same
purpose, but working in a much more straightforward way.  For this
reason, drop acpi_dev_pm_get_node() and use ACPI_COMPANION() instead
of it everywhere.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/acpi/device_pm.c |   24 ++++++------------------
 1 file changed, 6 insertions(+), 18 deletions(-)


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Comments

Mika Westerberg Jan. 21, 2014, 9:45 a.m. UTC | #1
On Sun, Jan 19, 2014 at 04:38:33PM +0100, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
> 
> The ACPI device PM code in device_pm.c uses a special function,
> acpi_dev_pm_get_node(), to obtain an ACPI companion object of a given
> device.  However, that is not necessary any more after recent changes
> that introduced the ACPI_COMPANION() macro serving exactly the same
> purpose, but working in a much more straightforward way.  For this
> reason, drop acpi_dev_pm_get_node() and use ACPI_COMPANION() instead
> of it everywhere.
> 
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
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Patch
diff mbox series

Index: linux-pm/drivers/acpi/device_pm.c
===================================================================
--- linux-pm.orig/drivers/acpi/device_pm.c
+++ linux-pm/drivers/acpi/device_pm.c
@@ -727,18 +727,6 @@  int acpi_pm_device_sleep_wake(struct dev
 #endif /* CONFIG_PM_SLEEP */
 
 /**
- * acpi_dev_pm_get_node - Get ACPI device node for the given physical device.
- * @dev: Device to get the ACPI node for.
- */
-struct acpi_device *acpi_dev_pm_get_node(struct device *dev)
-{
-	acpi_handle handle = ACPI_HANDLE(dev);
-	struct acpi_device *adev;
-
-	return handle && !acpi_bus_get_device(handle, &adev) ? adev : NULL;
-}
-
-/**
  * acpi_dev_pm_low_power - Put ACPI device into a low-power state.
  * @dev: Device to put into a low-power state.
  * @adev: ACPI device node corresponding to @dev.
@@ -778,7 +766,7 @@  static int acpi_dev_pm_full_power(struct
  */
 int acpi_dev_runtime_suspend(struct device *dev)
 {
-	struct acpi_device *adev = acpi_dev_pm_get_node(dev);
+	struct acpi_device *adev = ACPI_COMPANION(dev);
 	bool remote_wakeup;
 	int error;
 
@@ -809,7 +797,7 @@  EXPORT_SYMBOL_GPL(acpi_dev_runtime_suspe
  */
 int acpi_dev_runtime_resume(struct device *dev)
 {
-	struct acpi_device *adev = acpi_dev_pm_get_node(dev);
+	struct acpi_device *adev = ACPI_COMPANION(dev);
 	int error;
 
 	if (!adev)
@@ -862,7 +850,7 @@  EXPORT_SYMBOL_GPL(acpi_subsys_runtime_re
  */
 int acpi_dev_suspend_late(struct device *dev)
 {
-	struct acpi_device *adev = acpi_dev_pm_get_node(dev);
+	struct acpi_device *adev = ACPI_COMPANION(dev);
 	u32 target_state;
 	bool wakeup;
 	int error;
@@ -894,7 +882,7 @@  EXPORT_SYMBOL_GPL(acpi_dev_suspend_late)
  */
 int acpi_dev_resume_early(struct device *dev)
 {
-	struct acpi_device *adev = acpi_dev_pm_get_node(dev);
+	struct acpi_device *adev = ACPI_COMPANION(dev);
 	int error;
 
 	if (!adev)
@@ -985,7 +973,7 @@  static struct dev_pm_domain acpi_general
  */
 int acpi_dev_pm_attach(struct device *dev, bool power_on)
 {
-	struct acpi_device *adev = acpi_dev_pm_get_node(dev);
+	struct acpi_device *adev = ACPI_COMPANION(dev);
 
 	if (!adev)
 		return -ENODEV;
@@ -1017,7 +1005,7 @@  EXPORT_SYMBOL_GPL(acpi_dev_pm_attach);
  */
 void acpi_dev_pm_detach(struct device *dev, bool power_off)
 {
-	struct acpi_device *adev = acpi_dev_pm_get_node(dev);
+	struct acpi_device *adev = ACPI_COMPANION(dev);
 
 	if (adev && dev->pm_domain == &acpi_general_pm_domain) {
 		dev->pm_domain = NULL;