[media] media: lirc_dev: introduce lirc_allocate_device and lirc_free_device

Introduce two new functions so that the API for lirc_dev matches that
of the rc-core and input subsystems.

This means that lirc_dev structs are managed using the usual four
functions:

lirc_allocate_device
lirc_free_device
lirc_register_device
lirc_unregister_device

The functions are pretty simplistic at this point, later patches will put
more flesh on the bones of both.

Signed-off-by: David Härdeman <david@hardeman.nu>
Signed-off-by: Sean Young <sean@mess.org>

drivers/media/rc/ir-lirc-codec.c

@@ -347,7 +347,7 @@ static int ir_lirc_register(struct rc_dev *dev)
 	int rc = -ENOMEM;
 	unsigned long features = 0;
 
-	ldev = kzalloc(sizeof(*ldev), GFP_KERNEL);
+	ldev = lirc_allocate_device();
 	if (!ldev)
 		return rc;
 

drivers/media/rc/lirc_dev.c

@@ -103,6 +103,19 @@ out:
 	return err;
 }
 
+struct lirc_dev *
+lirc_allocate_device(void)
+{
+	return kzalloc(sizeof(struct lirc_dev), GFP_KERNEL);
+}
+EXPORT_SYMBOL(lirc_allocate_device);
+
+void lirc_free_device(struct lirc_dev *d)
+{
+	kfree(d);
+}
+EXPORT_SYMBOL(lirc_free_device);
+
 int lirc_register_device(struct lirc_dev *d)
 {
 	struct irctl *ir;

include/media/lirc_dev.h

@@ -156,11 +156,10 @@ struct lirc_dev {
 	struct irctl *irctl;
 };
 
-/* following functions can be called ONLY from user context
- *
- * returns negative value on error or zero
- * contents of the structure pointed by p is copied
- */
+struct lirc_dev *lirc_allocate_device(void);
+
+void lirc_free_device(struct lirc_dev *d);
+
 int lirc_register_device(struct lirc_dev *d);
 
 void lirc_unregister_device(struct lirc_dev *d);