Input: do not register statically allocated devices
Do not register statically allocated input devices to prevent
OOPS when attaching input interfaces since it requires class
device to be properly initialized.
Signed-off-by: Dmitry Torokhov <[email protected]>
---
drivers/input/input.c | 26 +++++++++++++++-----------
include/linux/input.h | 2 +-
2 files changed, 16 insertions(+), 12 deletions(-)
Index: work/drivers/input/input.c
===================================================================
--- work.orig/drivers/input/input.c
+++ work/drivers/input/input.c
@@ -377,7 +377,7 @@ static int input_devices_read(char *buf,
list_for_each_entry(dev, &input_dev_list, node) {
- path = dev->dynalloc ? kobject_get_path(&dev->cdev.kobj, GFP_KERNEL) : NULL;
+ path = kobject_get_path(&dev->cdev.kobj, GFP_KERNEL);
len = sprintf(buf, "I: Bus=%04x Vendor=%04x Product=%04x Version=%04x\n",
dev->id.bustype, dev->id.vendor, dev->id.product, dev->id.version);
@@ -741,15 +741,21 @@ static void input_register_classdevice(s
sysfs_create_group(&dev->cdev.kobj, &input_dev_caps_attr_group);
}
-void input_register_device(struct input_dev *dev)
+int input_register_device(struct input_dev *dev)
{
struct input_handle *handle;
struct input_handler *handler;
struct input_device_id *id;
- set_bit(EV_SYN, dev->evbit);
+ if (!dev->dynalloc) {
+ printk(KERN_WARNING "input: device %s is statically allocated, will not register\n"
+ "Please convert to input_allocate_device() or contact [email protected]\n",
+ dev->name ? dev->name : "<Unknown>");
+ return -EINVAL;
+ }
init_MUTEX(&dev->sem);
+ set_bit(EV_SYN, dev->evbit);
/*
* If delay and period are pre-set by the driver, then autorepeating
@@ -767,8 +773,7 @@ void input_register_device(struct input_
INIT_LIST_HEAD(&dev->h_list);
list_add_tail(&dev->node, &input_dev_list);
- if (dev->dynalloc)
- input_register_classdevice(dev);
+ input_register_classdevice(dev);
list_for_each_entry(handler, &input_handler_list, node)
if (!handler->blacklist || !input_match_device(handler->blacklist, dev))
@@ -776,8 +781,9 @@ void input_register_device(struct input_
if ((handle = handler->connect(handler, dev, id)))
input_link_handle(handle);
-
input_wakeup_procfs_readers();
+
+ return 0;
}
void input_unregister_device(struct input_dev *dev)
@@ -797,11 +803,9 @@ void input_unregister_device(struct inpu
list_del_init(&dev->node);
- if (dev->dynalloc) {
- sysfs_remove_group(&dev->cdev.kobj, &input_dev_caps_attr_group);
- sysfs_remove_group(&dev->cdev.kobj, &input_dev_id_attr_group);
- class_device_unregister(&dev->cdev);
- }
+ sysfs_remove_group(&dev->cdev.kobj, &input_dev_caps_attr_group);
+ sysfs_remove_group(&dev->cdev.kobj, &input_dev_id_attr_group);
+ class_device_unregister(&dev->cdev);
input_wakeup_procfs_readers();
}
Index: work/include/linux/input.h
===================================================================
--- work.orig/include/linux/input.h
+++ work/include/linux/input.h
@@ -1007,7 +1007,7 @@ static inline void input_put_device(stru
class_device_put(&dev->cdev);
}
-void input_register_device(struct input_dev *);
+int input_register_device(struct input_dev *);
void input_unregister_device(struct input_dev *);
void input_register_handler(struct input_handler *);
-
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