netdev - [PATCH net-next 03/12] net: hns3: add some debug information for hclge_check_event

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Date:   Fri, 19 Apr 2019 11:05:38 +0800
From:   Huazhong Tan <tanhuazhong@...wei.com>
To:     <davem@...emloft.net>
CC:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <salil.mehta@...wei.com>, <yisen.zhuang@...wei.com>,
        <linuxarm@...wei.com>, <nhorman@...hat.com>,
        Huazhong Tan <tanhuazhong@...wei.com>,
        Peng Li <lipeng321@...wei.com>
Subject: [PATCH net-next 03/12] net: hns3: add some debug information for hclge_check_event_cause

When received vector0 msix and other event interrupt, it should
print the value of the register for debugging.

Signed-off-by: Huazhong Tan <tanhuazhong@...wei.com>
Signed-off-by: Peng Li <lipeng321@...wei.com>
---
 drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
index 2748c2f..9b7bc22 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
@@ -2383,8 +2383,11 @@ static u32 hclge_check_event_cause(struct hclge_dev *hdev, u32 *clearval)
 	}
 
 	/* check for vector0 msix event source */
-	if (msix_src_reg & HCLGE_VECTOR0_REG_MSIX_MASK)
+	if (msix_src_reg & HCLGE_VECTOR0_REG_MSIX_MASK) {
+		dev_dbg(&hdev->pdev->dev, "received event 0x%x\n",
+			msix_src_reg);
 		return HCLGE_VECTOR0_EVENT_ERR;
+	}
 
 	/* check for vector0 mailbox(=CMDQ RX) event source */
 	if (BIT(HCLGE_VECTOR0_RX_CMDQ_INT_B) & cmdq_src_reg) {
@@ -2393,6 +2396,9 @@ static u32 hclge_check_event_cause(struct hclge_dev *hdev, u32 *clearval)
 		return HCLGE_VECTOR0_EVENT_MBX;
 	}
 
+	/* print other vector0 event source */
+	dev_dbg(&hdev->pdev->dev, "cmdq_src_reg:0x%x, msix_src_reg:0x%x\n",
+		cmdq_src_reg, msix_src_reg);
 	return HCLGE_VECTOR0_EVENT_OTHER;
 }
 
-- 
2.7.4