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-rw-r--r--drivers/acpi/asus_acpi.c18
-rw-r--r--drivers/acpi/scan.c34
-rw-r--r--drivers/char/sonypi.c10
-rw-r--r--include/acpi/acpi_bus.h2
4 files changed, 32 insertions, 32 deletions
diff --git a/drivers/acpi/asus_acpi.c b/drivers/acpi/asus_acpi.c
index 1a545489e859..90eb3c5a15ca 100644
--- a/drivers/acpi/asus_acpi.c
+++ b/drivers/acpi/asus_acpi.c
@@ -1119,6 +1119,8 @@ static int asus_hotk_check(void)
return result;
}
+static int asus_hotk_found;
+
static int asus_hotk_add(struct acpi_device *device)
{
acpi_status status = AE_OK;
@@ -1180,6 +1182,8 @@ static int asus_hotk_add(struct acpi_device *device)
}
}
+ asus_hotk_found = 1;
+
end:
if (result) {
kfree(hotk);
@@ -1226,7 +1230,19 @@ static int __init asus_acpi_init(void)
asus_proc_dir->owner = THIS_MODULE;
result = acpi_bus_register_driver(&asus_hotk_driver);
- if (result < 1) {
+ if (result < 0) {
+ remove_proc_entry(PROC_ASUS, acpi_root_dir);
+ return -ENODEV;
+ }
+
+ /*
+ * This is a bit of a kludge. We only want this module loaded
+ * for ASUS systems, but there's currently no way to probe the
+ * ACPI namespace for ASUS HIDs. So we just return failure if
+ * we didn't find one, which will cause the module to be
+ * unloaded.
+ */
+ if (!asus_hotk_found) {
acpi_bus_unregister_driver(&asus_hotk_driver);
remove_proc_entry(PROC_ASUS, acpi_root_dir);
return -ENODEV;
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index a5fa85832fa3..fc676ac0e3ed 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -142,7 +142,7 @@ static void acpi_device_register(struct acpi_device *device,
create_sysfs_device_files(device);
}
-static int acpi_device_unregister(struct acpi_device *device, int type)
+static void acpi_device_unregister(struct acpi_device *device, int type)
{
spin_lock(&acpi_device_lock);
if (device->parent) {
@@ -158,7 +158,6 @@ static int acpi_device_unregister(struct acpi_device *device, int type)
acpi_detach_data(device->handle, acpi_bus_data_handler);
remove_sysfs_device_files(device);
kobject_unregister(&device->kobj);
- return 0;
}
void acpi_bus_data_handler(acpi_handle handle, u32 function, void *context)
@@ -537,10 +536,9 @@ static int acpi_start_single_object(struct acpi_device *device)
return_VALUE(result);
}
-static int acpi_driver_attach(struct acpi_driver *drv)
+static void acpi_driver_attach(struct acpi_driver *drv)
{
struct list_head *node, *next;
- int count = 0;
ACPI_FUNCTION_TRACE("acpi_driver_attach");
@@ -557,7 +555,6 @@ static int acpi_driver_attach(struct acpi_driver *drv)
if (!acpi_bus_driver_init(dev, drv)) {
acpi_start_single_object(dev);
atomic_inc(&drv->references);
- count++;
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Found driver [%s] for device [%s]\n",
drv->name, dev->pnp.bus_id));
@@ -566,10 +563,9 @@ static int acpi_driver_attach(struct acpi_driver *drv)
spin_lock(&acpi_device_lock);
}
spin_unlock(&acpi_device_lock);
- return_VALUE(count);
}
-static int acpi_driver_detach(struct acpi_driver *drv)
+static void acpi_driver_detach(struct acpi_driver *drv)
{
struct list_head *node, *next;
@@ -591,7 +587,6 @@ static int acpi_driver_detach(struct acpi_driver *drv)
}
}
spin_unlock(&acpi_device_lock);
- return_VALUE(0);
}
/**
@@ -599,28 +594,22 @@ static int acpi_driver_detach(struct acpi_driver *drv)
* @driver: driver being registered
*
* Registers a driver with the ACPI bus. Searches the namespace for all
- * devices that match the driver's criteria and binds. Returns the
- * number of devices that were claimed by the driver, or a negative
- * error status for failure.
+ * devices that match the driver's criteria and binds. Returns zero for
+ * success or a negative error status for failure.
*/
int acpi_bus_register_driver(struct acpi_driver *driver)
{
- int count;
-
ACPI_FUNCTION_TRACE("acpi_bus_register_driver");
if (acpi_disabled)
return_VALUE(-ENODEV);
- if (!driver)
- return_VALUE(-EINVAL);
-
spin_lock(&acpi_device_lock);
list_add_tail(&driver->node, &acpi_bus_drivers);
spin_unlock(&acpi_device_lock);
- count = acpi_driver_attach(driver);
+ acpi_driver_attach(driver);
- return_VALUE(count);
+ return_VALUE(0);
}
EXPORT_SYMBOL(acpi_bus_register_driver);
@@ -632,13 +621,8 @@ EXPORT_SYMBOL(acpi_bus_register_driver);
* Unregisters a driver with the ACPI bus. Searches the namespace for all
* devices that match the driver's criteria and unbinds.
*/
-int acpi_bus_unregister_driver(struct acpi_driver *driver)
+void acpi_bus_unregister_driver(struct acpi_driver *driver)
{
- ACPI_FUNCTION_TRACE("acpi_bus_unregister_driver");
-
- if (!driver)
- return_VALUE(-EINVAL);
-
acpi_driver_detach(driver);
if (!atomic_read(&driver->references)) {
@@ -646,7 +630,7 @@ int acpi_bus_unregister_driver(struct acpi_driver *driver)
list_del_init(&driver->node);
spin_unlock(&acpi_device_lock);
}
- return_VALUE(0);
+ return;
}
EXPORT_SYMBOL(acpi_bus_unregister_driver);
diff --git a/drivers/char/sonypi.c b/drivers/char/sonypi.c
index a90f5d97df35..43dfd8689dce 100644
--- a/drivers/char/sonypi.c
+++ b/drivers/char/sonypi.c
@@ -512,7 +512,7 @@ static struct sonypi_device {
#ifdef CONFIG_ACPI
static struct acpi_device *sonypi_acpi_device;
-static int acpi_enabled;
+static int acpi_driver_registered;
#endif
static int sonypi_ec_write(u8 addr, u8 value)
@@ -869,7 +869,7 @@ found:
sonypi_report_input_event(event);
#ifdef CONFIG_ACPI
- if (acpi_enabled)
+ if (sonypi_acpi_device)
acpi_bus_generate_event(sonypi_acpi_device, 1, event);
#endif
@@ -1551,8 +1551,8 @@ static int __init sonypi_init(void)
goto err_free_device;
#ifdef CONFIG_ACPI
- if (acpi_bus_register_driver(&sonypi_acpi_driver) > 0)
- acpi_enabled = 1;
+ if (acpi_bus_register_driver(&sonypi_acpi_driver) >= 0)
+ acpi_driver_registered = 1;
#endif
return 0;
@@ -1567,7 +1567,7 @@ static int __init sonypi_init(void)
static void __exit sonypi_exit(void)
{
#ifdef CONFIG_ACPI
- if (acpi_enabled)
+ if (acpi_driver_registered)
acpi_bus_unregister_driver(&sonypi_acpi_driver);
#endif
platform_device_unregister(sonypi_platform_device);
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index 43f8c2a23a24..8c7590fdd822 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -327,7 +327,7 @@ int acpi_bus_set_power(acpi_handle handle, int state);
int acpi_bus_generate_event(struct acpi_device *device, u8 type, int data);
int acpi_bus_receive_event(struct acpi_bus_event *event);
int acpi_bus_register_driver(struct acpi_driver *driver);
-int acpi_bus_unregister_driver(struct acpi_driver *driver);
+void acpi_bus_unregister_driver(struct acpi_driver *driver);
int acpi_bus_add(struct acpi_device **child, struct acpi_device *parent,
acpi_handle handle, int type);
int acpi_bus_trim(struct acpi_device *start, int rmdevice);