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    Subject[PATCH 5.15 149/171] net: hns3: handle empty unknown interrupt for VF
    Date
    From: Yufeng Mo <moyufeng@huawei.com>

    [ Upstream commit 2f61353cd2f789a4229b6f5c1c24a40a613357bb ]

    Since some interrupt states may be cleared by hardware, the driver
    may receive an empty interrupt. Currently, the VF driver directly
    disables the vector0 interrupt in this case. As a result, the VF
    is unavailable. Therefore, the vector0 interrupt should be enabled
    in this case.

    Fixes: b90fcc5bd904 ("net: hns3: add reset handling for VF when doing Core/Global/IMP reset")
    Signed-off-by: Yufeng Mo <moyufeng@huawei.com>
    Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
    Signed-off-by: David S. Miller <davem@davemloft.net>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c | 3 +--
    1 file changed, 1 insertion(+), 2 deletions(-)

    diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c
    index fee7d9e79f8c3..417a08d600b83 100644
    --- a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c
    +++ b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c
    @@ -2496,8 +2496,7 @@ static irqreturn_t hclgevf_misc_irq_handle(int irq, void *data)
    break;
    }

    - if (event_cause != HCLGEVF_VECTOR0_EVENT_OTHER)
    - hclgevf_enable_vector(&hdev->misc_vector, true);
    + hclgevf_enable_vector(&hdev->misc_vector, true);

    return IRQ_HANDLED;
    }
    --
    2.34.1


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