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net: hns3: simplify hclge_cmd_csq_clean

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csq is used as a ring buffer, the value of the desc will be replaced
in next use. This patch removes the unnecessary memset, and just
updates the next_to_clean.

Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Huazhong Tan 2018-07-02 15:50:21 +08:00 committed by David S. Miller
parent 043fa454f4
commit 1c1270da47
1 changed files with 5 additions and 16 deletions
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21
drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.c
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@ -151,31 +151,20 @@ static int hclge_cmd_csq_clean(struct hclge_hw *hw)
{
struct hclge_dev *hdev = container_of(hw, struct hclge_dev, hw);
struct hclge_cmq_ring *csq = &hw->cmq.csq;
u16 ntc = csq->next_to_clean;
struct hclge_desc *desc;
int clean = 0;
u32 head;
int clean;
desc = &csq->desc[ntc];
head = hclge_read_dev(hw, HCLGE_NIC_CSQ_HEAD_REG);
rmb(); /* Make sure head is ready before touch any data */
if (!is_valid_csq_clean_head(csq, head)) {
dev_warn(&hdev->pdev->dev, "wrong head (%d, %d-%d)\n", head,
csq->next_to_use, csq->next_to_clean);
dev_warn(&hdev->pdev->dev, "wrong cmd head (%d, %d-%d)\n", head,
csq->next_to_use, csq->next_to_clean);
return 0;
}
while (head != ntc) {
memset(desc, 0, sizeof(*desc));
ntc++;
if (ntc == csq->desc_num)
ntc = 0;
desc = &csq->desc[ntc];
clean++;
}
csq->next_to_clean = ntc;
clean = (head - csq->next_to_clean + csq->desc_num) % csq->desc_num;
csq->next_to_clean = head;
return clean;
}