ACPI / PCI: Use ACPI_COMPANION() instead of ACPI_HANDLE()

The ACPI_HANDLE() macro evaluates ACPI_COMPANION() internally to
return the handle of the device's ACPI companion, so it is much
more straightforward and efficient to use ACPI_COMPANION()
directly to obtain the device's ACPI companion object instead of
using ACPI_HANDLE() and acpi_bus_get_device() on the returned
handle for the same thing.

Use ACPI_COMPANION() instead of ACPI_HANDLE() in the PCI ACPI support
code.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 7 insertions, 9 deletions

diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c
index ca4927ba8433..740efa8be969 100644
--- a/drivers/pci/pci-acpi.c
+++ b/drivers/pci/pci-acpi.c
@@ -170,14 +170,13 @@ static pci_power_t acpi_pci_choose_state(struct pci_dev *pdev)
 
 static bool acpi_pci_power_manageable(struct pci_dev *dev)
 {
-        acpi_handle handle = ACPI_HANDLE(&dev->dev);
-
-        return handle ? acpi_bus_power_manageable(handle) : false;
+        struct acpi_device *adev = ACPI_COMPANION(&dev->dev);
+        return adev ? acpi_device_power_manageable(adev) : false;
 }
 
 static int acpi_pci_set_power_state(struct pci_dev *dev, pci_power_t state)
 {
-        acpi_handle handle = ACPI_HANDLE(&dev->dev);
+        struct acpi_device *adev = ACPI_COMPANION(&dev->dev);
         static const u8 state_conv[] = {
                 [PCI_D0] = ACPI_STATE_D0,
                 [PCI_D1] = ACPI_STATE_D1,
@@ -188,7 +187,7 @@ static int acpi_pci_set_power_state(struct pci_dev *dev, pci_power_t state)
         int error = -EINVAL;
 
         /* If the ACPI device has _EJ0, ignore the device */
-        if (!handle || acpi_has_method(handle, "_EJ0"))
+        if (!adev || acpi_has_method(adev->handle, "_EJ0"))
                 return -ENODEV;
 
         switch (state) {
@@ -202,7 +201,7 @@ static int acpi_pci_set_power_state(struct pci_dev *dev, pci_power_t state)
         case PCI_D1:
         case PCI_D2:
         case PCI_D3hot:
-                error = acpi_bus_set_power(handle, state_conv[state]);
+                error = acpi_device_set_power(adev, state_conv[state]);
         }
 
         if (!error)
@@ -214,9 +213,8 @@ static int acpi_pci_set_power_state(struct pci_dev *dev, pci_power_t state)
 
 static bool acpi_pci_can_wakeup(struct pci_dev *dev)
 {
-        acpi_handle handle = ACPI_HANDLE(&dev->dev);
-
-        return handle ? acpi_bus_can_wakeup(handle) : false;
+        struct acpi_device *adev = ACPI_COMPANION(&dev->dev);
+        return adev ? acpi_device_can_wakeup(adev) : false;
 }
 
 static void acpi_pci_propagate_wakeup_enable(struct pci_bus *bus, bool enable)