net: hns3: simplify hclgevf_cmd_csq_clean

	return ring->desc_num - used - 1;

}

static int hclgevf_is_valid_csq_clean_head(struct hclgevf_cmq_ring *ring,

					   int head)

{

	int ntu = ring->next_to_use;

	int ntc = ring->next_to_clean;

	if (ntu > ntc)

		return head >= ntc && head <= ntu;

	return head >= ntc || head <= ntu;

}

static int hclgevf_cmd_csq_clean(struct hclgevf_hw *hw)

{

	struct hclgevf_dev *hdev = container_of(hw, struct hclgevf_dev, hw);

	struct hclgevf_cmq_ring *csq = &hw->cmq.csq;

	u16 ntc = csq->next_to_clean;

	struct hclgevf_desc *desc;

	int clean = 0;

	u32 head;

	desc = &csq->desc[ntc];

	head = hclgevf_read_dev(hw, HCLGEVF_NIC_CSQ_HEAD_REG);

	while (head != ntc) {

		memset(desc, 0, sizeof(*desc));

		ntc++;

		if (ntc == csq->desc_num)

			ntc = 0;

		desc = &csq->desc[ntc];

		clean++;

	rmb(); /* Make sure head is ready before touch any data */

	if (!hclgevf_is_valid_csq_clean_head(csq, head)) {

		dev_warn(&hdev->pdev->dev, "wrong cmd head (%d, %d-%d)\n", head,

			 csq->next_to_use, csq->next_to_clean);

		dev_warn(&hdev->pdev->dev,

			 "Disabling any further commands to IMP firmware\n");

		set_bit(HCLGEVF_STATE_CMD_DISABLE, &hdev->state);

		return -EIO;

	}

	csq->next_to_clean = ntc;

	clean = (head - csq->next_to_clean + csq->desc_num) % csq->desc_num;

	csq->next_to_clean = head;

	return clean;

}