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authorMatthew Garrett <mjg59@srcf.ucam.org>2008-11-26 00:48:14 +0300
committerJesse Barnes <jbarnes@virtuousgeek.org>2009-01-07 22:12:36 +0300
commit56ee325e25a0f76fc3267872867b3d70af179aad (patch)
treec1e840d33d1a1b315e312395b1a674380db91019 /drivers/pci/hotplug
parent86d8698027fd30cc067d2aeeb1e3603d43c83df0 (diff)
downloadlinux-56ee325e25a0f76fc3267872867b3d70af179aad.tar.xz
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>
Diffstat (limited to 'drivers/pci/hotplug')
-rw-r--r--drivers/pci/hotplug/acpiphp_glue.c32
1 files changed, 17 insertions, 15 deletions
diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c
index 3affc6472e65..1b19b7ec3e8c 100644
--- a/drivers/pci/hotplug/acpiphp_glue.c
+++ b/drivers/pci/hotplug/acpiphp_glue.c
@@ -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)))