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-rw-r--r--drivers/acpi/bus.c6
-rw-r--r--drivers/acpi/scan.c42
-rw-r--r--include/acpi/acpi_bus.h2
3 files changed, 40 insertions, 10 deletions
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index fcb59c21c68d..c3237774632f 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -340,7 +340,7 @@ static void acpi_bus_osc_support(void)
*/
static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
{
- struct acpi_device *device = NULL;
+ struct acpi_device *device;
struct acpi_driver *driver;
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Notification %#02x to handle %p\n",
@@ -387,12 +387,14 @@ static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
break;
}
- acpi_bus_get_device(handle, &device);
+ device = acpi_bus_get_acpi_device(handle);
if (device) {
driver = device->driver;
if (driver && driver->ops.notify &&
(driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS))
driver->ops.notify(device, type);
+
+ acpi_bus_put_acpi_device(device);
}
}
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 7384158c7f87..59eba29a6066 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -476,7 +476,7 @@ static void acpi_device_hotplug(void *data, u32 src)
out:
acpi_evaluate_hotplug_ost(adev->handle, src, ost_code, NULL);
- put_device(&adev->dev);
+ acpi_bus_put_acpi_device(adev);
mutex_unlock(&acpi_scan_lock);
unlock_device_hotplug();
}
@@ -488,9 +488,6 @@ static void acpi_hotplug_notify_cb(acpi_handle handle, u32 type, void *data)
struct acpi_device *adev;
acpi_status status;
- if (acpi_bus_get_device(handle, &adev))
- goto err_out;
-
switch (type) {
case ACPI_NOTIFY_BUS_CHECK:
acpi_handle_debug(handle, "ACPI_NOTIFY_BUS_CHECK event\n");
@@ -512,12 +509,15 @@ static void acpi_hotplug_notify_cb(acpi_handle handle, u32 type, void *data)
/* non-hotplug event; possibly handled by other handler */
return;
}
- get_device(&adev->dev);
+ adev = acpi_bus_get_acpi_device(handle);
+ if (!adev)
+ goto err_out;
+
status = acpi_hotplug_execute(acpi_device_hotplug, adev, type);
if (ACPI_SUCCESS(status))
return;
- put_device(&adev->dev);
+ acpi_bus_put_acpi_device(adev);
err_out:
acpi_evaluate_hotplug_ost(handle, type, ost_code, NULL);
@@ -1112,14 +1112,16 @@ static void acpi_scan_drop_device(acpi_handle handle, void *context)
mutex_unlock(&acpi_device_del_lock);
}
-int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device)
+static int acpi_get_device_data(acpi_handle handle, struct acpi_device **device,
+ void (*callback)(void *))
{
acpi_status status;
if (!device)
return -EINVAL;
- status = acpi_get_data(handle, acpi_scan_drop_device, (void **)device);
+ status = acpi_get_data_full(handle, acpi_scan_drop_device,
+ (void **)device, callback);
if (ACPI_FAILURE(status) || !*device) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n",
handle));
@@ -1127,8 +1129,32 @@ int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device)
}
return 0;
}
+
+int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device)
+{
+ return acpi_get_device_data(handle, device, NULL);
+}
EXPORT_SYMBOL(acpi_bus_get_device);
+static void get_acpi_device(void *dev)
+{
+ if (dev)
+ get_device(&((struct acpi_device *)dev)->dev);
+}
+
+struct acpi_device *acpi_bus_get_acpi_device(acpi_handle handle)
+{
+ struct acpi_device *adev = NULL;
+
+ acpi_get_device_data(handle, &adev, get_acpi_device);
+ return adev;
+}
+
+void acpi_bus_put_acpi_device(struct acpi_device *adev)
+{
+ put_device(&adev->dev);
+}
+
int acpi_device_add(struct acpi_device *device,
void (*release)(struct device *))
{
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index 8256eb4ad057..94fd61a0456d 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -381,6 +381,8 @@ extern int unregister_acpi_notifier(struct notifier_block *);
*/
int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device);
+struct acpi_device *acpi_bus_get_acpi_device(acpi_handle handle);
+void acpi_bus_put_acpi_device(struct acpi_device *adev);
acpi_status acpi_bus_get_status_handle(acpi_handle handle,
unsigned long long *sta);
int acpi_bus_get_status(struct acpi_device *device);