Commit 56ee325e authored by Matthew Garrett's avatar Matthew Garrett Committed by Jesse Barnes
Browse files

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: default avatarKristen Carlson Accardi <>
Signed-off-by: default avatarMatthew Garrett <>
Signed-off-by: default avatarJesse Barnes <>
parent 86d86980
......@@ -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,
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)
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)))
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