netdev - Re: [PATCH net-next 0/2] ethtool mm API improvements

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Date:   Sat, 15 Apr 2023 21:09:36 +0300
From:   Vladimir Oltean <vladimir.oltean@....com>
To:     netdev@...r.kernel.org
Cc:     "David S. Miller" <davem@...emloft.net>,
        Michal Kubecek <mkubecek@...e.cz>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Claudiu Manoil <claudiu.manoil@....com>,
        Xiaoliang Yang <xiaoliang.yang_1@....com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next 0/2] ethtool mm API improvements

On Sat, Apr 15, 2023 at 08:34:52PM +0300, Vladimir Oltean wrote:
> Currently the ethtool --set-mm API permits the existence of 2
> configurations which don't make sense:
> 
> - pmac-enabled false tx-enabled true
> - tx-enabled false verify-enabled true
> 
> By rejecting these, we can give driver-level code more guarantees.
> I re-ran the MM selftest posted here (which I need to repost):
> https://lore.kernel.org/netdev/20230210221243.228932-1-vladimir.oltean@nxp.com/
> 
> and it didn't cause functional problems.

Actually, it looks like that selftest passed by mistake in the
configuration that I tested it in. I actually get these failures:

~/selftests/net/forwarding# journalctl -b -u lldpad
Apr 15 18:05:10 lldpad[705]: arg_path "tlvid00120f07.addFragSize"
Apr 15 18:05:10 lldpad[705]: arg_path "tlvid00120f07.addFragSize"
Apr 15 18:05:10 lldpad[705]: arg_path "tlvid00120f07.addFragSize"
Apr 15 18:05:10 lldpad[705]: arg_path "tlvid00120f07.addFragSize"
Apr 15 18:05:10 lldpad[705]: Signal 15 received - terminating
Apr 15 18:05:10 lldpad[705]: ethtool: kernel reports: TX enabled requires pMAC enabled
Apr 15 18:05:10 lldpad[705]: ethtool: kernel reports: TX enabled requires pMAC enabled
Apr 15 18:05:10 systemd[1]: lldpad.service: Deactivated successfully.
Apr 15 18:05:10 systemd[1]: Stopped Link Layer Discovery Protocol Agent Daemon..

Please disregard at least patch 2. Patch 1 is still perfectly valid as-is.