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Commit b05681b9 authored by Mauro Carvalho Chehab's avatar Mauro Carvalho Chehab
Browse files

[media] rc-main: Fix device de-registration logic 



rc unregister logic were deadly broken, preventing some drivers to
be removed. Among the broken things, rc_dev_uevent() is being called
during device_del(), causing a data filling on an area that it is
not ready anymore.

Also, some drivers have a stop callback defined, that needs to be called
before data removal, as it stops data polling.

Acked-by: default avatarJarod Wilson <jarod@redhat.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent eaceba65

drivers/media/rc/rc-main.c

+19 −10
Original line number Diff line number Diff line
@@ -928,10 +928,6 @@ static ssize_t store_protocols(struct device *device, 


static void rc_dev_release(struct device *device)

{

	struct rc_dev *dev = to_rc_dev(device);



	kfree(dev);

	module_put(THIS_MODULE);

}



#define ADD_HOTPLUG_VAR(fmt, val...)					\
@@ -945,6 +941,9 @@ static int rc_dev_uevent(struct device *device, struct kobj_uevent_env *env) 
{

	struct rc_dev *dev = to_rc_dev(device);



	if (!dev || !dev->input_dev)

		return -ENODEV;



	if (dev->rc_map.name)

		ADD_HOTPLUG_VAR("NAME=%s", dev->rc_map.name);

	if (dev->driver_name)
@@ -1013,10 +1012,16 @@ EXPORT_SYMBOL_GPL(rc_allocate_device); 


void rc_free_device(struct rc_dev *dev)

{

	if (dev) {

	if (!dev)

		return;



	if (dev->input_dev)

		input_free_device(dev->input_dev);



	put_device(&dev->dev);

	}



	kfree(dev);

	module_put(THIS_MODULE);

}

EXPORT_SYMBOL_GPL(rc_free_device);
@@ -1143,14 +1148,18 @@ void rc_unregister_device(struct rc_dev *dev) 
	if (dev->driver_type == RC_DRIVER_IR_RAW)

		ir_raw_event_unregister(dev);



	/* Freeing the table should also call the stop callback */

	ir_free_table(&dev->rc_map);

	IR_dprintk(1, "Freed keycode table\n");



	input_unregister_device(dev->input_dev);

	dev->input_dev = NULL;



	ir_free_table(&dev->rc_map);

	IR_dprintk(1, "Freed keycode table\n");

	device_del(&dev->dev);



	device_unregister(&dev->dev);

	rc_free_device(dev);

}



EXPORT_SYMBOL_GPL(rc_unregister_device);



/*