UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

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>
This commit is contained in:
Rafael J. Wysocki 2014-02-04 00:39:20 +01:00
parent 4dc3082dc1
commit b2118d6a40
1 changed files with 9 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
drivers/pci/hotplug/acpiphp_glue.c
View File

@ -638,11 +638,8 @@ static void disable_slot(struct acpiphp_slot *slot)
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 @@ static bool slot_no_hotplug(struct acpiphp_slot *slot)
{
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 @@ static void trim_stale_devices(struct pci_dev *dev)
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;