static int slim_val_inf_sanity()

in messaging.c [179:209]

• 29 lines of code
• 15 McCabe index (conditional complexity)

static int slim_val_inf_sanity(struct slim_controller *ctrl,
			       struct slim_val_inf *msg, u8 mc)
{
	if (!msg || msg->num_bytes > 16 ||
	    (msg->start_offset + msg->num_bytes) > 0xC00)
		goto reterr;
	switch (mc) {
	case SLIM_MSG_MC_REQUEST_VALUE:
	case SLIM_MSG_MC_REQUEST_INFORMATION:
		if (msg->rbuf != NULL)
			return 0;
		break;

	case SLIM_MSG_MC_CHANGE_VALUE:
	case SLIM_MSG_MC_CLEAR_INFORMATION:
		if (msg->wbuf != NULL)
			return 0;
		break;

	case SLIM_MSG_MC_REQUEST_CHANGE_VALUE:
	case SLIM_MSG_MC_REQUEST_CLEAR_INFORMATION:
		if (msg->rbuf != NULL && msg->wbuf != NULL)
			return 0;
		break;
	}
reterr:
	if (msg)
		dev_err(ctrl->dev, "Sanity check failed:msg:offset:0x%x, mc:%d\n",
			msg->start_offset, mc);
	return -EINVAL;
}