cxgb4: reject overlapped queues in TC-MQPRIO offload

	struct port_info *pi = netdev2pinfo(dev);

	struct adapter *adap = netdev2adap(dev);

	u32 speed, qcount = 0, qoffset = 0;

	u32 start_a, start_b, end_a, end_b;

	int ret;

	u8 i;

	u8 i, j;

	if (!mqprio->qopt.num_tc)

		return 0;

		qoffset = max_t(u16, mqprio->qopt.offset[i], qoffset);

		qcount += mqprio->qopt.count[i];

		start_a = mqprio->qopt.offset[i];

		end_a = start_a + mqprio->qopt.count[i] - 1;

		for (j = i + 1; j < mqprio->qopt.num_tc; j++) {

			start_b = mqprio->qopt.offset[j];

			end_b = start_b + mqprio->qopt.count[j] - 1;

			/* If queue count is 0, then the traffic

			 * belonging to this class will not use

			 * ETHOFLD queues. So, no need to validate

			 * further.

			 */

			if (!mqprio->qopt.count[i])

				break;

			if (!mqprio->qopt.count[j])

				continue;

			if (max_t(u32, start_a, start_b) <=

			    min_t(u32, end_a, end_b)) {

				netdev_err(dev,

					   "Queues can't overlap across tc\n");

				return -EINVAL;

			}

		}

		/* Convert byte per second to bits per second */

		min_rate += (mqprio->min_rate[i] * 8);

		max_rate += (mqprio->max_rate[i] * 8);