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Commit 7177876f authored by Amit Shah's avatar Amit Shah Committed by Rusty Russell
Browse files

virtio: console: Add ability to remove module 



Add the ability to remove the virtio_console module.

This aids debugging.

Signed-off-by: default avatarAmit Shah <amit.shah@redhat.com>
Signed-off-by: default avatarRusty Russell <rusty@rustcorp.com.au>
parent a9cdd485

drivers/char/virtio_console.c

+41 −0
Original line number Diff line number Diff line
@@ -1448,6 +1448,36 @@ fail: 
	return err;

}



static void virtcons_remove(struct virtio_device *vdev)

{

	struct ports_device *portdev;

	struct port *port, *port2;

	struct port_buffer *buf;

	unsigned int len;



	portdev = vdev->priv;



	cancel_work_sync(&portdev->control_work);

	cancel_work_sync(&portdev->config_work);



	list_for_each_entry_safe(port, port2, &portdev->ports, list)

		remove_port(port);



	unregister_chrdev(portdev->chr_major, "virtio-portsdev");



	while ((buf = portdev->c_ivq->vq_ops->get_buf(portdev->c_ivq, &len)))

		free_buf(buf);



	while ((buf = portdev->c_ivq->vq_ops->detach_unused_buf(portdev->c_ivq)))

		free_buf(buf);



	vdev->config->del_vqs(vdev);

	kfree(portdev->in_vqs);

	kfree(portdev->out_vqs);



	kfree(portdev);

}



static struct virtio_device_id id_table[] = {

	{ VIRTIO_ID_CONSOLE, VIRTIO_DEV_ANY_ID },

	{ 0 },
@@ -1465,6 +1495,7 @@ static struct virtio_driver virtio_console = { 
	.driver.owner =	THIS_MODULE,

	.id_table =	id_table,

	.probe =	virtcons_probe,

	.remove =	virtcons_remove,

	.config_changed = config_intr,

};
@@ -1488,7 +1519,17 @@ static int __init init(void) 


	return register_virtio_driver(&virtio_console);

}



static void __exit fini(void)

{

	unregister_virtio_driver(&virtio_console);



	class_destroy(pdrvdata.class);

	if (pdrvdata.debugfs_dir)

		debugfs_remove_recursive(pdrvdata.debugfs_dir);

}

module_init(init);

module_exit(fini);



MODULE_DEVICE_TABLE(virtio, id_table);

MODULE_DESCRIPTION("Virtio console driver");