linux-kernel - Re: [net PATCH] net: stmmac: update priv->speed to SPEED

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Message-ID: <b499cbcd-a3c9-4f38-a69a-ad465e7f8d5a@windriver.com>
Date: Wed, 29 May 2024 08:22:01 +0800
From: xiaolei wang <xiaolei.wang@...driver.com>
To: Andrew Lunn <andrew@...n.ch>
Cc: alexandre.torgue@...s.st.com, joabreu@...opsys.com, davem@...emloft.net,
        edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
        mcoquelin.stm32@...il.com, netdev@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [net PATCH] net: stmmac: update priv->speed to SPEED_UNKNOWN when
 link down


On 5/28/24 21:20, Andrew Lunn wrote:
> CAUTION: This email comes from a non Wind River email account!
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>
> On Tue, May 28, 2024 at 05:20:10PM +0800, Xiaolei Wang wrote:
>> The CBS parameter can still be configured when the port is
>> currently disconnected and link down. This is unreasonable.
> This sounds like a generic problem. Can the core check the carrier
> status and error out there? Maybe return a useful extack message.
>
> If you do need to return an error code, ENETDOWN seems more

Currently cbs does not check link status. If ops->ndo_setup_tc() returns 
failure, there will only be an output of "Specified device failed to 
setup cbs hardware offload".

thanks

xiaolei

> appropriate.
>
>         Andrew