PCI/ACPI: acpiphp: Identify more removable slots
According to section 6.3.6 of the ACPI spec, the presence of an _RMV
method that evaluates to 1 is sufficient to indicate that a slot is
removable without needing an eject method. This patch refactors the
ejectable slot detection code a little in order to flag these slots as
ejectable and register them. Acpihp then binds to the expresscard slot
on my HP test machine.
Acked-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c
index 3affc64..1b19b7e 100644
--- a/drivers/pci/hotplug/acpiphp_glue.c
+++ b/drivers/pci/hotplug/acpiphp_glue.c
@@ -74,7 +74,7 @@
* Ejectable slot should satisfy at least these conditions:
*
* 1. has _ADR method
- * 2. has _EJ0 method
+ * 2. has _EJ0 method or _RMV method
*
* optionally
*
@@ -87,18 +87,25 @@
{
acpi_status status;
acpi_handle tmp;
+ unsigned long long removable;
status = acpi_get_handle(handle, "_ADR", &tmp);
- if (ACPI_FAILURE(status)) {
+ if (ACPI_FAILURE(status))
return 0;
- }
status = acpi_get_handle(handle, "_EJ0", &tmp);
- if (ACPI_FAILURE(status)) {
- return 0;
+ if (ACPI_SUCCESS(status))
+ return 1;
+
+ status = acpi_get_handle(handle, "_RMV", &tmp);
+ if (ACPI_SUCCESS(status)) {
+ status = acpi_evaluate_integer(handle, "_RMV", NULL,
+ &removable);
+ if (ACPI_SUCCESS(status) && removable)
+ return 1;
}
- return 1;
+ return 0;
}
@@ -185,16 +192,10 @@
unsigned long long adr, sun;
int device, function, retval;
- status = acpi_evaluate_integer(handle, "_ADR", NULL, &adr);
-
- if (ACPI_FAILURE(status))
+ if (!is_ejectable(handle) && !is_dock_device(handle))
return AE_OK;
- status = acpi_get_handle(handle, "_EJ0", &tmp);
-
- if (ACPI_FAILURE(status) && !(is_dock_device(handle)))
- return AE_OK;
-
+ acpi_evaluate_integer(handle, "_ADR", NULL, &adr);
device = (adr >> 16) & 0xffff;
function = adr & 0xffff;
@@ -205,7 +206,8 @@
INIT_LIST_HEAD(&newfunc->sibling);
newfunc->handle = handle;
newfunc->function = function;
- if (ACPI_SUCCESS(status))
+
+ if (ACPI_SUCCESS(acpi_get_handle(handle, "_EJ0", &tmp)))
newfunc->flags = FUNC_HAS_EJ0;
if (ACPI_SUCCESS(acpi_get_handle(handle, "_STA", &tmp)))