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Input: handle failures in input_register_device() 

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Dmitry Torokhov 2005-11-20 00:56:31 -05:00
parent e597f0c80d
commit bd0ef2356c
1 changed files with 36 additions and 27 deletions
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63
drivers/input/input.c
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@ -536,7 +536,7 @@ static struct attribute *input_dev_attrs[] = {
NULL
};
static struct attribute_group input_dev_group = {
static struct attribute_group input_dev_attr_group = {
.attrs = input_dev_attrs,
};
@ -717,35 +717,14 @@ struct input_dev *input_allocate_device(void)
return dev;
}
static void input_register_classdevice(struct input_dev *dev)
{
static atomic_t input_no = ATOMIC_INIT(0);
const char *path;
__module_get(THIS_MODULE);
dev->dev = dev->cdev.dev;
snprintf(dev->cdev.class_id, sizeof(dev->cdev.class_id),
"input%ld", (unsigned long) atomic_inc_return(&input_no) - 1);
path = kobject_get_path(&dev->cdev.class->subsys.kset.kobj, GFP_KERNEL);
printk(KERN_INFO "input: %s as %s/%s\n",
dev->name ? dev->name : "Unspecified device",
path ? path : "", dev->cdev.class_id);
kfree(path);
class_device_add(&dev->cdev);
sysfs_create_group(&dev->cdev.kobj, &input_dev_group);
sysfs_create_group(&dev->cdev.kobj, &input_dev_id_attr_group);
sysfs_create_group(&dev->cdev.kobj, &input_dev_caps_attr_group);
}
int input_register_device(struct input_dev *dev)
{
static atomic_t input_no = ATOMIC_INIT(0);
struct input_handle *handle;
struct input_handler *handler;
struct input_device_id *id;
const char *path;
int error;
if (!dev->dynalloc) {
printk(KERN_WARNING "input: device %s is statically allocated, will not register\n"
@ -773,7 +752,32 @@ int input_register_device(struct input_dev *dev)
INIT_LIST_HEAD(&dev->h_list);
list_add_tail(&dev->node, &input_dev_list);
input_register_classdevice(dev);
dev->cdev.class = &input_class;
snprintf(dev->cdev.class_id, sizeof(dev->cdev.class_id),
"input%ld", (unsigned long) atomic_inc_return(&input_no) - 1);
error = class_device_add(&dev->cdev);
if (error)
return error;
error = sysfs_create_group(&dev->cdev.kobj, &input_dev_attr_group);
if (error)
goto fail1;
error = sysfs_create_group(&dev->cdev.kobj, &input_dev_id_attr_group);
if (error)
goto fail2;
error = sysfs_create_group(&dev->cdev.kobj, &input_dev_caps_attr_group);
if (error)
goto fail3;
__module_get(THIS_MODULE);
path = kobject_get_path(&dev->cdev.kobj, GFP_KERNEL);
printk(KERN_INFO "input: %s as %s\n",
dev->name ? dev->name : "Unspecified device", path ? path : "N/A");
kfree(path);
list_for_each_entry(handler, &input_handler_list, node)
if (!handler->blacklist || !input_match_device(handler->blacklist, dev))
@ -784,6 +788,11 @@ int input_register_device(struct input_dev *dev)
input_wakeup_procfs_readers();
return 0;
fail3: sysfs_remove_group(&dev->cdev.kobj, &input_dev_id_attr_group);
fail2: sysfs_remove_group(&dev->cdev.kobj, &input_dev_attr_group);
fail1: class_device_del(&dev->cdev);
return error;
}
void input_unregister_device(struct input_dev *dev)
@ -805,7 +814,7 @@ void input_unregister_device(struct input_dev *dev)
sysfs_remove_group(&dev->cdev.kobj, &input_dev_caps_attr_group);
sysfs_remove_group(&dev->cdev.kobj, &input_dev_id_attr_group);
sysfs_remove_group(&dev->cdev.kobj, &input_dev_group);
sysfs_remove_group(&dev->cdev.kobj, &input_dev_attr_group);
class_device_unregister(&dev->cdev);
input_wakeup_procfs_readers();