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authorDmitry Torokhov <dmitry.torokhov@gmail.com>2009-12-04 00:36:15 -0800
committerLen Brown <len.brown@intel.com>2009-12-16 12:53:11 -0500
commit9634a627b330fcc7cdca25df4d7853ca9c7745de (patch)
treef5a727d12849a835546f5c5dc7fcb6b82182daae /drivers/platform
parent0ad3dc3af8ba028368263b190a7a270f8d5cf5ae (diff)
downloadop-kernel-dev-9634a627b330fcc7cdca25df4d7853ca9c7745de.zip
op-kernel-dev-9634a627b330fcc7cdca25df4d7853ca9c7745de.tar.gz
tc1100-wmi - add error handling for device registration
Any of the platform API functions can fail; driver should be prepared to handle such failures. Also: - changed to platform_driver_probe() since the device is created right there with the driver; - added __devexit annotation to remove method; - fixed memory leak on module unload - named platform_device_del() is not enough to free platform device, need platform_device_unregister(). Signed-off-by: Dmitry Torokhov <dtor@mail.ru> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/platform')
-rw-r--r--drivers/platform/x86/tc1100-wmi.c58
1 files changed, 30 insertions, 28 deletions
diff --git a/drivers/platform/x86/tc1100-wmi.c b/drivers/platform/x86/tc1100-wmi.c
index 0d53d51..fa2995b 100644
--- a/drivers/platform/x86/tc1100-wmi.c
+++ b/drivers/platform/x86/tc1100-wmi.c
@@ -47,22 +47,6 @@ MODULE_DESCRIPTION("HP Compaq TC1100 Tablet WMI Extras");
MODULE_LICENSE("GPL");
MODULE_ALIAS("wmi:C364AC71-36DB-495A-8494-B439D472A505");
-static int tc1100_probe(struct platform_device *device);
-static int tc1100_remove(struct platform_device *device);
-static int tc1100_suspend(struct platform_device *device, pm_message_t state);
-static int tc1100_resume(struct platform_device *device);
-
-static struct platform_driver tc1100_driver = {
- .driver = {
- .name = "tc1100-wmi",
- .owner = THIS_MODULE,
- },
- .probe = tc1100_probe,
- .remove = tc1100_remove,
- .suspend = tc1100_suspend,
- .resume = tc1100_resume,
-};
-
static struct platform_device *tc1100_device;
struct tc1100_data {
@@ -197,13 +181,13 @@ static struct attribute_group tc1100_attribute_group = {
Driver Model
-------------------------------------------------------------------------- */
-static int tc1100_probe(struct platform_device *device)
+static int __init tc1100_probe(struct platform_device *device)
{
return sysfs_create_group(&device->dev.kobj, &tc1100_attribute_group);
}
-static int tc1100_remove(struct platform_device *device)
+static int __devexit tc1100_remove(struct platform_device *device)
{
sysfs_remove_group(&device->dev.kobj, &tc1100_attribute_group);
@@ -240,31 +224,49 @@ static int tc1100_resume(struct platform_device *dev)
return ret;
}
+static struct platform_driver tc1100_driver = {
+ .driver = {
+ .name = "tc1100-wmi",
+ .owner = THIS_MODULE,
+ },
+ .remove = __devexit_p(tc1100_remove),
+ .suspend = tc1100_suspend,
+ .resume = tc1100_resume,
+};
+
static int __init tc1100_init(void)
{
- int result = 0;
+ int error;
if (!wmi_has_guid(GUID))
return -ENODEV;
- result = platform_driver_register(&tc1100_driver);
- if (result)
- return result;
-
tc1100_device = platform_device_alloc("tc1100-wmi", -1);
- platform_device_add(tc1100_device);
+ if (!tc1100_device)
+ return -ENOMEM;
+
+ error = platform_device_add(tc1100_device);
+ if (error)
+ goto err_device_put;
+
+ error = platform_driver_probe(&tc1100_driver, tc1100_probe);
+ if (error)
+ goto err_device_del;
printk(TC1100_INFO "HP Compaq TC1100 Tablet WMI Extras loaded\n");
+ return 0;
- return result;
+ err_device_del:
+ platform_device_del(tc1100_device);
+ err_device_put:
+ platform_device_put(tc1100_device);
+ return error;
}
static void __exit tc1100_exit(void)
{
- platform_device_del(tc1100_device);
+ platform_device_unregister(tc1100_device);
platform_driver_unregister(&tc1100_driver);
-
- printk(TC1100_INFO "HP Compaq TC1100 Tablet WMI Extras unloaded\n");
}
module_init(tc1100_init);
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