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Code Issues Releases Wiki Activity

ACPI / hotplug / PCI: Drop acpiphp_bus_trim()

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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>
This commit is contained in:
Rafael J. Wysocki 2014-02-04 00:38:52 +01:00
parent 146fc68a4b
commit 4dc3082dc1
1 changed files with 11 additions and 19 deletions
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30
drivers/pci/hotplug/acpiphp_glue.c
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@ -488,19 +488,6 @@ static unsigned char acpiphp_max_busnr(struct pci_bus *bus)
return max;
}
/**
* 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;