diff options
| author | Anisse Astier <anisse@astier.eu> | 2009-12-10 16:18:15 +0300 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2009-12-16 20:40:53 +0300 |
| commit | 46b51eb9e14afb3bde4bc2fe3bbc22ce012647d4 (patch) | |
| tree | 05ab778507e4ba9a13c8dec630fccb8646cf9623 /drivers/platform | |
| parent | addd65aac7bcfed7348048b3ce24774718fc44c3 (diff) | |
| download | linux-46b51eb9e14afb3bde4bc2fe3bbc22ce012647d4.tar.xz | |
msi-wmi: rework init
There should be less code duplication with usage of gotos
Driver won't load if there's no hardware to control
Safer error handling at input driver allocation
Signed-off-by: Anisse Astier <anisse@astier.eu>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/platform')
| -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 fb988d8f4267..dcb048c0793f 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) |