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path: root/drivers/acpi/glue.c
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Diffstat (limited to 'drivers/acpi/glue.c')
-rw-r--r--drivers/acpi/glue.c85
1 files changed, 48 insertions, 37 deletions
diff --git a/drivers/acpi/glue.c b/drivers/acpi/glue.c
index 35da18113216..ef6f155469b5 100644
--- a/drivers/acpi/glue.c
+++ b/drivers/acpi/glue.c
@@ -68,6 +68,9 @@ static struct acpi_bus_type *acpi_get_bus_type(struct bus_type *type)
{
struct acpi_bus_type *tmp, *ret = NULL;
+ if (!type)
+ return NULL;
+
down_read(&bus_type_sem);
list_for_each_entry(tmp, &bus_type_list, list) {
if (tmp->bus == type) {
@@ -95,40 +98,31 @@ static int acpi_find_bridge_device(struct device *dev, acpi_handle * handle)
return ret;
}
-/* Get device's handler per its address under its parent */
-struct acpi_find_child {
- acpi_handle handle;
- u64 address;
-};
-
-static acpi_status
-do_acpi_find_child(acpi_handle handle, u32 lvl, void *context, void **rv)
+static acpi_status do_acpi_find_child(acpi_handle handle, u32 lvl_not_used,
+ void *addr_p, void **ret_p)
{
+ unsigned long long addr;
acpi_status status;
- struct acpi_device_info *info;
- struct acpi_find_child *find = context;
-
- status = acpi_get_object_info(handle, &info);
- if (ACPI_SUCCESS(status)) {
- if ((info->address == find->address)
- && (info->valid & ACPI_VALID_ADR))
- find->handle = handle;
- kfree(info);
+
+ status = acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL, &addr);
+ if (ACPI_SUCCESS(status) && addr == *((u64 *)addr_p)) {
+ *ret_p = handle;
+ return AE_CTRL_TERMINATE;
}
return AE_OK;
}
acpi_handle acpi_get_child(acpi_handle parent, u64 address)
{
- struct acpi_find_child find = { NULL, address };
+ void *ret = NULL;
if (!parent)
return NULL;
- acpi_walk_namespace(ACPI_TYPE_DEVICE, parent,
- 1, do_acpi_find_child, NULL, &find, NULL);
- return find.handle;
-}
+ acpi_walk_namespace(ACPI_TYPE_DEVICE, parent, 1, NULL,
+ do_acpi_find_child, &address, &ret);
+ return (acpi_handle)ret;
+}
EXPORT_SYMBOL(acpi_get_child);
static int acpi_bind_one(struct device *dev, acpi_handle handle)
@@ -269,28 +263,39 @@ static int acpi_platform_notify(struct device *dev)
{
struct acpi_bus_type *type;
acpi_handle handle;
- int ret = -EINVAL;
+ int ret;
ret = acpi_bind_one(dev, NULL);
- if (!ret)
- goto out;
-
- if (!dev->bus || !dev->parent) {
+ if (ret && (!dev->bus || !dev->parent)) {
/* bridge devices genernally haven't bus or parent */
ret = acpi_find_bridge_device(dev, &handle);
- goto end;
+ if (!ret) {
+ ret = acpi_bind_one(dev, handle);
+ if (ret)
+ goto out;
+ }
}
+
type = acpi_get_bus_type(dev->bus);
- if (!type) {
- DBG("No ACPI bus support for %s\n", dev_name(dev));
- ret = -EINVAL;
- goto end;
+ if (ret) {
+ if (!type || !type->find_device) {
+ DBG("No ACPI bus support for %s\n", dev_name(dev));
+ ret = -EINVAL;
+ goto out;
+ }
+
+ ret = type->find_device(dev, &handle);
+ if (ret) {
+ DBG("Unable to get handle for %s\n", dev_name(dev));
+ goto out;
+ }
+ ret = acpi_bind_one(dev, handle);
+ if (ret)
+ goto out;
}
- if ((ret = type->find_device(dev, &handle)) != 0)
- DBG("Can't get handler for %s\n", dev_name(dev));
- end:
- if (!ret)
- acpi_bind_one(dev, handle);
+
+ if (type && type->setup)
+ type->setup(dev);
out:
#if ACPI_GLUE_DEBUG
@@ -309,6 +314,12 @@ static int acpi_platform_notify(struct device *dev)
static int acpi_platform_notify_remove(struct device *dev)
{
+ struct acpi_bus_type *type;
+
+ type = acpi_get_bus_type(dev->bus);
+ if (type && type->cleanup)
+ type->cleanup(dev);
+
acpi_unbind_one(dev);
return 0;
}