netdev - Re: [PATCH iwl-next v5 1/9] net: ethtool: mm: extract stmmac verification logic into common library

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Message-ID: <3fbe3955-48b8-449d-93ff-2699a7efcd8d@linux.intel.com>
Date: Fri, 21 Feb 2025 21:30:09 +0800
From: "Abdul Rahim, Faizal" <faizal.abdul.rahim@...ux.intel.com>
To: Vladimir Oltean <vladimir.oltean@....com>, Furong Xu <0x1207@...il.com>
Cc: Tony Nguyen <anthony.l.nguyen@...el.com>,
 Przemek Kitszel <przemyslaw.kitszel@...el.com>,
 Andrew Lunn <andrew+netdev@...n.ch>, "David S . Miller"
 <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
 Maxime Coquelin <mcoquelin.stm32@...il.com>,
 Alexandre Torgue <alexandre.torgue@...s.st.com>,
 Simon Horman <horms@...nel.org>, Russell King <linux@...linux.org.uk>,
 Alexei Starovoitov <ast@...nel.org>, Daniel Borkmann <daniel@...earbox.net>,
 Jesper Dangaard Brouer <hawk@...nel.org>,
 John Fastabend <john.fastabend@...il.com>,
 Russell King <rmk+kernel@...linux.org.uk>,
 Serge Semin <fancer.lancer@...il.com>,
 Xiaolei Wang <xiaolei.wang@...driver.com>,
 Suraj Jaiswal <quic_jsuraj@...cinc.com>,
 Kory Maincent <kory.maincent@...tlin.com>, Gal Pressman <gal@...dia.com>,
 Jesper Nilsson <jesper.nilsson@...s.com>,
 Andrew Halaney <ahalaney@...hat.com>,
 Choong Yong Liang <yong.liang.choong@...ux.intel.com>,
 Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>,
 Vinicius Costa Gomes <vinicius.gomes@...el.com>,
 intel-wired-lan@...ts.osuosl.org, netdev@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-stm32@...md-mailman.stormreply.com,
 linux-arm-kernel@...ts.infradead.org, bpf@...r.kernel.org
Subject: Re: [PATCH iwl-next v5 1/9] net: ethtool: mm: extract stmmac
 verification logic into common library

On 21/2/2025 6:43 pm, Vladimir Oltean wrote:
> On Fri, Feb 21, 2025 at 06:24:09PM +0800, Furong Xu wrote:
>> Your fix is better when link is up/down, so I vote verify_enabled.
> 
> Hmmm... I thought this was a bug in stmmac that was carried over to
> ethtool_mmsv, but it looks like it isn't.
> 
> In fact, looking at the original refactoring patch I had attached in
> this email:
> https://lore.kernel.org/netdev/20241217002254.lyakuia32jbnva46@skbuf/
> 
> these 2 lines in ethtool_mmsv_link_state_handle() didn't exist at all.
> 
> 	} else {
>>>>> 		mmsv->status = ETHTOOL_MM_VERIFY_STATUS_INITIAL;
>>>>> 		mmsv->verify_retries = ETHTOOL_MM_MAX_VERIFY_RETRIES;
> 
> 		/* No link or pMAC not enabled */
> 		ethtool_mmsv_configure_pmac(mmsv, false);
> 		ethtool_mmsv_configure_tx(mmsv, false);
> 	}
> 
> Faizal, could you remind me why they were added? I don't see this
> explained in change logs.
> 

Hi Vladimir,

Yeah, it wasn’t there originally. I added that change because it failed the 
link down/link up test.
After a successful verification, if the link partner goes down, the status 
still shows ETHTOOL_MM_VERIFY_STATUS_SUCCEEDED, which isn’t correct—so 
that’s why I added it.

Sorry for not mentioning it earlier. I assumed you’d check the delta 
between the original patch and the upstream one, my bad, should have 
mentioned this logic change.

Should I update it to the latest suggestion?