static int init_iso_resource()

in core-cdev.c [1363:1415]

• 46 lines of code
• 9 McCabe index (conditional complexity)

static int init_iso_resource(struct client *client,
		struct fw_cdev_allocate_iso_resource *request, int todo)
{
	struct iso_resource_event *e1, *e2;
	struct iso_resource *r;
	int ret;

	if ((request->channels == 0 && request->bandwidth == 0) ||
	    request->bandwidth > BANDWIDTH_AVAILABLE_INITIAL)
		return -EINVAL;

	r  = kmalloc(sizeof(*r), GFP_KERNEL);
	e1 = kmalloc(sizeof(*e1), GFP_KERNEL);
	e2 = kmalloc(sizeof(*e2), GFP_KERNEL);
	if (r == NULL || e1 == NULL || e2 == NULL) {
		ret = -ENOMEM;
		goto fail;
	}

	INIT_DELAYED_WORK(&r->work, iso_resource_work);
	r->client	= client;
	r->todo		= todo;
	r->generation	= -1;
	r->channels	= request->channels;
	r->bandwidth	= request->bandwidth;
	r->e_alloc	= e1;
	r->e_dealloc	= e2;

	e1->iso_resource.closure = request->closure;
	e1->iso_resource.type    = FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED;
	e2->iso_resource.closure = request->closure;
	e2->iso_resource.type    = FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED;

	if (todo == ISO_RES_ALLOC) {
		r->resource.release = release_iso_resource;
		ret = add_client_resource(client, &r->resource, GFP_KERNEL);
		if (ret < 0)
			goto fail;
	} else {
		r->resource.release = NULL;
		r->resource.handle = -1;
		schedule_iso_resource(r, 0);
	}
	request->handle = r->resource.handle;

	return 0;
 fail:
	kfree(r);
	kfree(e1);
	kfree(e2);

	return ret;
}