From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Lunn Subject: Re: [PATCH net-next] net: phy: add GBit master / slave error detection Date: Thu, 19 Jul 2018 16:46:37 +0200 Message-ID: <20180719144637.GA9119@lunn.ch> References: <60685308-a848-e4d0-e170-f2738f046679@gmail.com> <8ccaeb57-3150-65ce-2310-3aac52f446c5@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Florian Fainelli , David Miller , "netdev@vger.kernel.org" To: Heiner Kallweit Return-path: Received: from vps0.lunn.ch ([185.16.172.187]:40105 "EHLO vps0.lunn.ch" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727367AbeGSPaL (ORCPT ); Thu, 19 Jul 2018 11:30:11 -0400 Content-Disposition: inline In-Reply-To: <8ccaeb57-3150-65ce-2310-3aac52f446c5@gmail.com> Sender: netdev-owner@vger.kernel.org List-ID: > > AFAIR there was a patch a while ago from Mellanox guys that was possibly > > extending the link notification with an error cause, this sounds like > > something that could be useful to report to user space somehow to help > > troubleshoot link down events. > > > Do you by chance have a reference to this patch? There's heavy development > on the Mellanox drivers with a lot of patches. Hi Heiner, Florian A general mechanism has been added to allow error messages to be reported via netlink sockets. I think wifi was the first to actually make use of it, since i think Johannes Berg did the core work, but other parts of the stack have also started using it. Just picking a commit at random, maybe not the best of examples: Fixes: 768075ebc238 ("nl80211: add a few extended error strings to key parsing") Andrew