ACPI / hotplug / PCI: Drop acpiphp_bus_trim()

If trim_stale_devices() calls acpi_bus_trim() directly, we can
save a potentially costly acpi_bus_get_device() invocation.  After
making that change acpiphp_bus_trim() would only be called from one
place, so move the code from it to that place and drop it.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>

1 files changed, 11 insertions, 19 deletions

diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c
index c97454c74c26..caeef648287a 100644
--- a/drivers/pci/hotplug/acpiphp_glue.c
+++ b/drivers/pci/hotplug/acpiphp_glue.c
@@ -489,19 +489,6 @@ static unsigned char acpiphp_max_busnr(struct pci_bus *bus)
 }
 
 /**
- * acpiphp_bus_trim - Trim device objects in an ACPI namespace subtree.
- * @handle: ACPI device object handle to start from.
- */
-static void acpiphp_bus_trim(acpi_handle handle)
-{
-        struct acpi_device *adev = NULL;
-
-        acpi_bus_get_device(handle, &adev);
-        if (adev)
-                acpi_bus_trim(adev);
-}
-
-/**
  * acpiphp_bus_add - Scan ACPI namespace subtree.
  * @handle: ACPI object handle to start the scan from.
  */
@@ -641,8 +628,12 @@ static void disable_slot(struct acpiphp_slot *slot)
                 if (PCI_SLOT(dev->devfn) == slot->device)
                         pci_stop_and_remove_bus_device(dev);
 
-        list_for_each_entry(func, &slot->funcs, sibling)
-                acpiphp_bus_trim(func_to_handle(func));
+        list_for_each_entry(func, &slot->funcs, sibling) {
+                struct acpi_device *adev;
+
+                if (!acpi_bus_get_device(func_to_handle(func), &adev))
+                        acpi_bus_trim(adev);
+        }
 
         slot->flags &= (~SLOT_ENABLED);
 }
@@ -714,11 +705,12 @@ static unsigned int get_slot_status(struct acpiphp_slot *slot)
  */
 static void trim_stale_devices(struct pci_dev *dev)
 {
-        acpi_handle handle = ACPI_HANDLE(&dev->dev);
+        struct acpi_device *adev = ACPI_COMPANION(&dev->dev);
         struct pci_bus *bus = dev->subordinate;
         bool alive = false;
 
-        if (handle) {
+        if (adev) {
+                acpi_handle handle = adev->handle;
                 acpi_status status;
                 unsigned long long sta;
 
@@ -734,8 +726,8 @@ static void trim_stale_devices(struct pci_dev *dev)
         }
         if (!alive) {
                 pci_stop_and_remove_bus_device(dev);
-                if (handle)
-                        acpiphp_bus_trim(handle);
+                if (adev)
+                        acpi_bus_trim(adev);
         } else if (bus) {
                 struct pci_dev *child, *tmp;