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ACPI: simplify acpiphp driver with new helper functions 

Use the new helper functions introduced previously to simplify the
ACPI-based PCI hotplug (acpiphp) driver.

[rjw: Changelog]
Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Jiang Liu 2013-06-29 00:24:43 +08:00 committed by Rafael J. Wysocki
parent c9b5471f88
commit ecd046da57
1 changed files with 8 additions and 22 deletions
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30
drivers/pci/hotplug/acpiphp_glue.c
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@ -201,7 +201,6 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
struct acpiphp_bridge *bridge = (struct acpiphp_bridge *)context;
struct acpiphp_slot *slot;
struct acpiphp_func *newfunc;
acpi_handle tmp;
acpi_status status = AE_OK;
unsigned long long adr, sun;
int device, function, retval, found = 0;
@ -232,19 +231,19 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
newfunc->handle = handle;
newfunc->function = function;
if (ACPI_SUCCESS(acpi_get_handle(handle, "_EJ0", &tmp)))
if (acpi_has_method(handle, "_EJ0"))
newfunc->flags = FUNC_HAS_EJ0;
if (ACPI_SUCCESS(acpi_get_handle(handle, "_STA", &tmp)))
if (acpi_has_method(handle, "_STA"))
newfunc->flags |= FUNC_HAS_STA;
if (ACPI_SUCCESS(acpi_get_handle(handle, "_PS0", &tmp)))
if (acpi_has_method(handle, "_PS0"))
newfunc->flags |= FUNC_HAS_PS0;
if (ACPI_SUCCESS(acpi_get_handle(handle, "_PS3", &tmp)))
if (acpi_has_method(handle, "_PS3"))
newfunc->flags |= FUNC_HAS_PS3;
if (ACPI_SUCCESS(acpi_get_handle(handle, "_DCK", &tmp)))
if (acpi_has_method(handle, "_DCK"))
newfunc->flags |= FUNC_HAS_DCK;
status = acpi_evaluate_integer(handle, "_SUN", NULL, &sun);
@ -843,25 +842,14 @@ static unsigned int get_slot_status(struct acpiphp_slot *slot)
*/
int acpiphp_eject_slot(struct acpiphp_slot *slot)
{
acpi_status status;
struct acpiphp_func *func;
struct acpi_object_list arg_list;
union acpi_object arg;
list_for_each_entry(func, &slot->funcs, sibling) {
/* We don't want to call _EJ0 on non-existing functions. */
if ((func->flags & FUNC_HAS_EJ0)) {
/* _EJ0 method take one argument */
arg_list.count = 1;
arg_list.pointer = &arg;
arg.type = ACPI_TYPE_INTEGER;
arg.integer.value = 1;
status = acpi_evaluate_object(func->handle, "_EJ0", &arg_list, NULL);
if (ACPI_FAILURE(status)) {
warn("%s: _EJ0 failed\n", __func__);
if (ACPI_FAILURE(acpi_evaluate_ej0(func->handle)))
return -1;
} else
else
break;
}
}
@ -1171,7 +1159,6 @@ static void handle_hotplug_event_func(acpi_handle handle, u32 type,
*/
void acpiphp_enumerate_slots(struct pci_bus *bus, acpi_handle handle)
{
acpi_handle dummy_handle;
struct acpiphp_bridge *bridge;
if (acpiphp_disabled)
@ -1200,8 +1187,7 @@ void acpiphp_enumerate_slots(struct pci_bus *bus, acpi_handle handle)
get_device(&bus->dev);
if (!pci_is_root_bus(bridge->pci_bus) &&
ACPI_SUCCESS(acpi_get_handle(bridge->handle,
"_EJ0", &dummy_handle))) {
acpi_has_method(bridge->handle, "_EJ0")) {
dbg("found ejectable p2p bridge\n");
bridge->flags |= BRIDGE_HAS_EJ0;
bridge->func = acpiphp_bridge_handle_to_function(handle);