This is a note to let you know that I've just added the patch titled net: hns3: handle empty unknown interrupt for VF to the 5.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: net-hns3-handle-empty-unknown-interrupt-for-vf.patch and it can be found in the queue-5.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 52f3e41bf4de4dcf8110963948000a2a3cbd913b Author: Yufeng Mo <moyufeng@xxxxxxxxxx> Date: Tue Jan 25 15:03:12 2022 +0800 net: hns3: handle empty unknown interrupt for VF [ 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@xxxxxxxxxx> Signed-off-by: Guangbin Huang <huangguangbin2@xxxxxxxxxx> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c index ce6a4e1965e1d..403c1b9cf6ab8 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c @@ -1970,8 +1970,7 @@ 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; }