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authorDmitry Torokhov <dmitry.torokhov@gmail.com>2009-12-17 22:19:42 -0800
committerLen Brown <len.brown@intel.com>2009-12-24 00:44:46 -0500
commit1fdd407f4e3f2ecb453954cbebb6c22491c61853 (patch)
treefc0508260e2e26a7ee8f728da2c57aa9b9f75703
parent3e9b988e4edf065d39c1343937f717319b1c1065 (diff)
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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: Dmitry Torokhov <dtor@mail.ru> Acked-by: Matthew Garrett <mjg@redhat.com> Signed-off-by: Len Brown <len.brown@intel.com>
-rw-r--r--drivers/platform/x86/dell-wmi.c41
1 files changed, 19 insertions, 22 deletions
diff --git a/drivers/platform/x86/dell-wmi.c b/drivers/platform/x86/dell-wmi.c
index 6561dfc028e..916ccb2b316 100644
--- a/drivers/platform/x86/dell-wmi.c
+++ b/drivers/platform/x86/dell-wmi.c
@@ -325,37 +325,34 @@ 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);
-
- err = dell_wmi_input_setup();
-
- if (err)
- return err;
-
- err = wmi_install_notify_handler(DELL_EVENT_GUID,
- 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);
- return err;
- }
+ dmi_walk(find_hk_type, NULL);
+ acpi_video = acpi_video_backlight_support();
- acpi_video = acpi_video_backlight_support();
+ err = dell_wmi_input_setup();
+ if (err)
+ return err;
- } else
- printk(KERN_WARNING "dell-wmi: No known WMI GUID found\n");
+ err = wmi_install_notify_handler(DELL_EVENT_GUID,
+ 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);
+ return err;
+ }
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);
- }
+ wmi_remove_notify_handler(DELL_EVENT_GUID);
+ input_unregister_device(dell_wmi_input_dev);
}
module_init(dell_wmi_init);