netdev - Re: [PATCH net-next 3/3] net: hns3: add support for link diagnosis info in debugfs

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Message-ID: <ce1e61d6-546e-2856-17cc-04419e30eaca@huawei.com>
Date:   Fri, 25 Jun 2021 15:08:02 +0800
From:   "huangguangbin (A)" <huangguangbin2@...wei.com>
To:     Jakub Kicinski <kuba@...nel.org>
CC:     <davem@...emloft.net>, <netdev@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <salil.mehta@...wei.com>,
        <lipeng321@...wei.com>
Subject: Re: [PATCH net-next 3/3] net: hns3: add support for link diagnosis
 info in debugfs



On 2021/6/25 3:25, Jakub Kicinski wrote:
> On Thu, 24 Jun 2021 22:36:45 +0800 Guangbin Huang wrote:
>> In order to know reason why link down, add a debugfs file
>> "link_diagnosis_info" to get link faults from firmware, and each bit
>> represents one kind of fault.
>>
>> usage example:
>> $ cat link_diagnosis_info
>> Reference clock lost
> 
> Please use ethtool->get_link_ext_state instead.
> .
> 
Ok, thanks.