Commit 1fdd407f authored by Dmitry Torokhov's avatar Dmitry Torokhov Committed by Len Brown
Browse files

dell-wmi: do not keep driver loaded on unsupported boxes 



There is no point in having the driver loaded in memory if we fail
to locate particular WMI GUID.

Signed-off-by: default avatarDmitry Torokhov <dtor@mail.ru>
Acked-by: default avatarMatthew Garrett <mjg@redhat.com>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent 3e9b988e

drivers/platform/x86/dell-wmi.c

+19 −22
Original line number Diff line number Diff line
@@ -325,11 +325,14 @@ static int __init dell_wmi_init(void) 
	int err;



	if (wmi_has_guid(DELL_EVENT_GUID)) {

		printk(KERN_WARNING "dell-wmi: No known WMI GUID found\n");

		return -ENODEV;

	}



	dmi_walk(find_hk_type, NULL);

	acpi_video = acpi_video_backlight_support();



	err = dell_wmi_input_setup();



	if (err)

		return err;
@@ -337,26 +340,20 @@ static int __init dell_wmi_init(void) 
					 dell_wmi_notify, NULL);

	if (err) {

		input_unregister_device(dell_wmi_input_dev);

			printk(KERN_ERR "dell-wmi: Unable to register"

			       " notify handler - %d\n", err);

		printk(KERN_ERR

			"dell-wmi: Unable to register notify handler - %d\n",

			err);

		return err;

	}



		acpi_video = acpi_video_backlight_support();



	} else

		printk(KERN_WARNING "dell-wmi: No known WMI GUID found\n");



	return 0;

}



static void __exit dell_wmi_exit(void)

{

	if (wmi_has_guid(DELL_EVENT_GUID)) {

	wmi_remove_notify_handler(DELL_EVENT_GUID);

	input_unregister_device(dell_wmi_input_dev);

}

}



module_init(dell_wmi_init);

module_exit(dell_wmi_exit);