ACPI / hotplug / PCI: Rework acpiphp_no_hotplug()
If a struct acpi_device pointer is passed to acpiphp_no_hotplug()
instead of an ACPI handle, the function won't need to call
acpi_bus_get_device(), which may be costly, any more. Then,
trim_stale_devices() can call acpiphp_no_hotplug() passing
the struct acpi_device object it already has directly to that
function.
Make those changes and update slot_no_hotplug() accordingly.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c
index caeef64..a0d6c83 100644
--- a/drivers/pci/hotplug/acpiphp_glue.c
+++ b/drivers/pci/hotplug/acpiphp_glue.c
@@ -638,11 +638,8 @@
slot->flags &= (~SLOT_ENABLED);
}
-static bool acpiphp_no_hotplug(acpi_handle handle)
+static bool acpiphp_no_hotplug(struct acpi_device *adev)
{
- struct acpi_device *adev = NULL;
-
- acpi_bus_get_device(handle, &adev);
return adev && adev->flags.no_hotplug;
}
@@ -650,10 +647,13 @@
{
struct acpiphp_func *func;
- list_for_each_entry(func, &slot->funcs, sibling)
- if (acpiphp_no_hotplug(func_to_handle(func)))
- return true;
+ list_for_each_entry(func, &slot->funcs, sibling) {
+ struct acpi_device *adev = NULL;
+ acpi_bus_get_device(func_to_handle(func), &adev);
+ if (acpiphp_no_hotplug(adev))
+ return true;
+ }
return false;
}
@@ -710,13 +710,12 @@
bool alive = false;
if (adev) {
- acpi_handle handle = adev->handle;
acpi_status status;
unsigned long long sta;
- status = acpi_evaluate_integer(handle, "_STA", NULL, &sta);
+ status = acpi_evaluate_integer(adev->handle, "_STA", NULL, &sta);
alive = (ACPI_SUCCESS(status) && sta == ACPI_STA_ALL)
- || acpiphp_no_hotplug(handle);
+ || acpiphp_no_hotplug(adev);
}
if (!alive) {
u32 v;