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net: hns3: Fix cmdq registers initialization issue for vf

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According to hardware's description, the head pointer register should
be written before the tail pointer register while initializing the vf
command queue. Otherwise, it may trigger an interrupt even though there
is no command received.

Fixes: fedd0c15d2 ("net: hns3: Add HNS3 VF IMP(Integrated Management Proc) cmd interface")
Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jian Shen 2018-09-19 18:29:55 +01:00 • committed by David S. Miller
parent fd8133148e
commit 37dc9cdbdc
1 changed files with 2 additions and 2 deletions
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4
drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_cmd.c
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@ -132,8 +132,8 @@ static int hclgevf_init_cmd_queue(struct hclgevf_dev *hdev,
reg_val |= HCLGEVF_NIC_CMQ_ENABLE;
hclgevf_write_dev(hw, HCLGEVF_NIC_CSQ_DEPTH_REG, reg_val);
hclgevf_write_dev(hw, HCLGEVF_NIC_CSQ_TAIL_REG, 0);
hclgevf_write_dev(hw, HCLGEVF_NIC_CSQ_HEAD_REG, 0);
hclgevf_write_dev(hw, HCLGEVF_NIC_CSQ_TAIL_REG, 0);
break;
case HCLGEVF_TYPE_CRQ:
reg_val = (u32)ring->desc_dma_addr;
@ -145,8 +145,8 @@ static int hclgevf_init_cmd_queue(struct hclgevf_dev *hdev,
reg_val |= HCLGEVF_NIC_CMQ_ENABLE;
hclgevf_write_dev(hw, HCLGEVF_NIC_CRQ_DEPTH_REG, reg_val);
hclgevf_write_dev(hw, HCLGEVF_NIC_CRQ_TAIL_REG, 0);
hclgevf_write_dev(hw, HCLGEVF_NIC_CRQ_HEAD_REG, 0);
hclgevf_write_dev(hw, HCLGEVF_NIC_CRQ_TAIL_REG, 0);
break;
}