i8042 controller support device async actions.
If boot option "dev_async_action" is added,
i8042 controller and its child devices can be
suspended/shutdown asynchronously.
Signed-off-by: Zhang Rui <rui.zhang@xxxxxxxxx>
---
drivers/input/serio/i8042.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
Index: linux-2.6/drivers/input/serio/i8042.c
===================================================================
--- linux-2.6.orig/drivers/input/serio/i8042.c
+++ linux-2.6/drivers/input/serio/i8042.c
@@ -1285,14 +1285,21 @@ static int __init i8042_init(void)
goto err_unregister_driver;
}
- err = platform_device_add(i8042_platform_device);
+ err = dev_async_register(&i8042_platform_device->dev,
+ DEV_ASYNC_SUSPEND | DEV_ASYNC_SHUTDOWN);
if (err)
goto err_free_device;
+ err = platform_device_add(i8042_platform_device);
+ if (err)
+ goto err_dev_async_unregister;
+
panic_blink = i8042_panic_blink;
return 0;
+ err_dev_async_unregister:
+ dev_async_unregister(&i8042_platform_device->dev);
err_free_device:
platform_device_put(i8042_platform_device);
err_unregister_driver:
@@ -1305,6 +1312,7 @@ static int __init i8042_init(void)
static void __exit i8042_exit(void)
{
+ dev_async_unregister(&i8042_platform_device->dev);
platform_device_unregister(i8042_platform_device);
platform_driver_unregister(&i8042_driver);
i8042_platform_exit();
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