int cxl_send_cmd()

in core/mbox.c [446:477]

• 24 lines of code
• 6 McCabe index (conditional complexity)

int cxl_send_cmd(struct cxl_memdev *cxlmd, struct cxl_send_command __user *s)
{
	struct cxl_dev_state *cxlds = cxlmd->cxlds;
	struct device *dev = &cxlmd->dev;
	struct cxl_send_command send;
	struct cxl_mem_command c;
	int rc;

	dev_dbg(dev, "Send IOCTL\n");

	if (copy_from_user(&send, s, sizeof(send)))
		return -EFAULT;

	rc = cxl_validate_cmd_from_user(cxlmd->cxlds, &send, &c);
	if (rc)
		return rc;

	/* Prepare to handle a full payload for variable sized output */
	if (c.info.size_out < 0)
		c.info.size_out = cxlds->payload_size;

	rc = handle_mailbox_cmd_from_user(cxlds, &c, send.in.payload,
					  send.out.payload, &send.out.size,
					  &send.retval);
	if (rc)
		return rc;

	if (copy_to_user(s, &send, sizeof(send)))
		return -EFAULT;

	return 0;
}