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

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Message-ID: <20210624122517.7c8cb329@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com>
Date:   Thu, 24 Jun 2021 12:25:17 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Guangbin Huang <huangguangbin2@...wei.com>
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 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.