linux-kernel - [PATCH 5.15 149/171] net: hns3: handle empty unknown interrupt for VF

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Message-Id: <20220131105235.059021273@linuxfoundation.org>
Date:   Mon, 31 Jan 2022 11:56:54 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Yufeng Mo <moyufeng@...wei.com>,
        Guangbin Huang <huangguangbin2@...wei.com>,
        "David S. Miller" <davem@...emloft.net>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.15 149/171] net: hns3: handle empty unknown interrupt for VF

From: Yufeng Mo <moyufeng@...wei.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@...wei.com>
Signed-off-by: Guangbin Huang <huangguangbin2@...wei.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <sashal@...nel.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