linux-kernel - [PATCH net-next 2/9] net: hns3: add struct netdev

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Message-ID: <1572521004-36126-3-git-send-email-tanhuazhong@huawei.com>
Date:   Thu, 31 Oct 2019 19:23:17 +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>, <jakub.kicinski@...ronome.com>,
        Yunsheng Lin <linyunsheng@...wei.com>,
        Huazhong Tan <tanhuazhong@...wei.com>
Subject: [PATCH net-next 2/9] net: hns3: add struct netdev_queue debug info for TX timeout

From: Yunsheng Lin <linyunsheng@...wei.com>

When there is a TX timeout, we can tell if the driver or stack
has stopped the queue by looking at state field, and when has
the last packet transmited by looking at trans_start field.

So this patch prints these two field in the
hns3_get_tx_timeo_queue_info().

Signed-off-by: Yunsheng Lin <linyunsheng@...wei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@...wei.com>
---
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
index 0fdd684..23bdfe8 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
@@ -1792,6 +1792,9 @@ static bool hns3_get_tx_timeo_queue_info(struct net_device *ndev)
 		    time_after(jiffies,
 			       (trans_start + ndev->watchdog_timeo))) {
 			timeout_queue = i;
+			netdev_info(ndev, "queue state: 0x%lx, delta msecs: %u\n",
+				    q->state,
+				    jiffies_to_msecs(jiffies - trans_start));
 			break;
 		}
 	}
-- 
2.7.4