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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>
This commit is contained in:
Matthew Garrett 2008-11-25 21:48:14 +00:00 committed by Jesse Barnes
parent 86d8698027
commit 56ee325e25
1 changed files with 17 additions and 15 deletions
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32
drivers/pci/hotplug/acpiphp_glue.c
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@ -74,7 +74,7 @@ static void handle_hotplug_event_func(acpi_handle handle, u32 type, void *contex
* 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 @@ static int is_ejectable(acpi_handle handle)
{
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 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
unsigned long long adr, sun;
int device, function, retval;
status = acpi_evaluate_integer(handle, "_ADR", NULL, &adr);
if (ACPI_FAILURE(status))
return AE_OK;
status = acpi_get_handle(handle, "_EJ0", &tmp);
if (ACPI_FAILURE(status) && !(is_dock_device(handle)))
if (!is_ejectable(handle) && !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 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
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)))