diff options
Diffstat (limited to 'drivers/platform/x86/msi-wmi.c')
| -rw-r--r-- | drivers/platform/x86/msi-wmi.c | 64 |
1 files changed, 35 insertions, 29 deletions
diff --git a/drivers/platform/x86/msi-wmi.c b/drivers/platform/x86/msi-wmi.c index fb988d8f426..dcb048c0793 100644 --- a/drivers/platform/x86/msi-wmi.c +++ b/drivers/platform/x86/msi-wmi.c @@ -284,6 +284,8 @@ static int __init msi_wmi_input_setup(void) int err; msi_wmi_input_dev = input_allocate_device(); + if (!msi_wmi_input_dev) + return -ENOMEM; msi_wmi_input_dev->name = "MSI WMI hotkeys"; msi_wmi_input_dev->phys = "wmi/input0"; @@ -314,40 +316,44 @@ static int __init msi_wmi_init(void) { int err; - if (wmi_has_guid(MSIWMI_EVENT_GUID)) { - err = wmi_install_notify_handler(MSIWMI_EVENT_GUID, - msi_wmi_notify, NULL); - if (err) - return -EINVAL; - - err = msi_wmi_input_setup(); - if (err) { - wmi_remove_notify_handler(MSIWMI_EVENT_GUID); - return -EINVAL; - } + if (!wmi_has_guid(MSIWMI_EVENT_GUID)) { + printk(KERN_ERR + "This machine doesn't have MSI-hotkeys through WMI\n"); + return -ENODEV; + } + err = wmi_install_notify_handler(MSIWMI_EVENT_GUID, + msi_wmi_notify, NULL); + if (err) + return -EINVAL; - if (!acpi_video_backlight_support()) { - backlight = backlight_device_register(DRV_NAME, - NULL, NULL, &msi_backlight_ops); - if (IS_ERR(backlight)) { - wmi_remove_notify_handler(MSIWMI_EVENT_GUID); - input_unregister_device(msi_wmi_input_dev); - return -EINVAL; - } + err = msi_wmi_input_setup(); + if (err) + goto err_uninstall_notifier; - backlight->props.max_brightness = ARRAY_SIZE(backlight_map) - 1; - err = bl_get(NULL); - if (err < 0) { - wmi_remove_notify_handler(MSIWMI_EVENT_GUID); - input_unregister_device(msi_wmi_input_dev); - backlight_device_unregister(backlight); - return -EINVAL; - } - backlight->props.brightness = err; - } + if (!acpi_video_backlight_support()) { + backlight = backlight_device_register(DRV_NAME, + NULL, NULL, &msi_backlight_ops); + if (IS_ERR(backlight)) + goto err_free_input; + + backlight->props.max_brightness = ARRAY_SIZE(backlight_map) - 1; + err = bl_get(NULL); + if (err < 0) + goto err_free_backlight; + + backlight->props.brightness = err; } printk(KERN_INFO DRV_PFX "Event handler installed\n"); + return 0; + +err_free_backlight: + backlight_device_unregister(backlight); +err_free_input: + input_unregister_device(msi_wmi_input_dev); +err_uninstall_notifier: + wmi_remove_notify_handler(MSIWMI_EVENT_GUID); + return err; } static void __exit msi_wmi_exit(void) |