Received: by 2002:a25:1506:0:0:0:0:0 with SMTP id 6csp1222228ybv; Thu, 20 Feb 2020 15:50:25 -0800 (PST) X-Google-Smtp-Source: APXvYqz5HH6raZJ+hnVNbvFT2n8kH2Po7YAp3kX+K4cr2XhIh0uSCyw329t/SBz26w2/Hw3TEV6P X-Received: by 2002:a05:6830:1e6b:: with SMTP id m11mr26600166otr.293.1582242625277; Thu, 20 Feb 2020 15:50:25 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1582242625; cv=none; d=google.com; s=arc-20160816; b=kFzt/xeebfgUuHMVB6HkK+cyok/8WCknp/C69r4Vir5OYxlAkFUdsktzzamNEZGe7+ AgoTa8q8EQi6mrZE1QoUaCtXvfVibRxV5nCGHXPADhZXNjNEJPFFC6abNpNNYt47of2A B6+TU8BBtyeocghSkUH7uVJJ/8QjP0s9Ts9CTBNie+M9qmtuX7deys1TytPxGeRuWf37 5WfyyOgUJ3MgJAKDvQVsYMVL+CQ3pKio0X4hKDh1CDCjhVz6k3rS2CcZy6ImR6RvX7Cz qSYtZ3Wnv37EzVhlk9BeI+nVm6TyMhFNaDL0Td9B0JeBB6ZJQmHQipycsNPOQbLnWHT+ ERhQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding:mime-version :references:in-reply-to:from:subject:cc:to:message-id:date; bh=FAimyVfyNkfTgfVHjbwi2MunIaUHCqeLxu6k2KSueCA=; b=NIpq/t4Up9fHAQcl/SI0Phofe6JmXZOAq8SWiErEiPczRtguRp1hqJJhna49oTmjK0 lmsCqHxtV4761i7DoU2UxrSQ2XixlfI+chyug30+SpilHi51mmGYNCLOXg4YY4j2oT/W bBxkP8tWcqwWDe0qBiWUBXMcGexFtpZ/cFF9Sa+vDz6xYjSTXaZMhspBUZALFuVAfRpv CJGDLnrewY/ltXt+QgjFnCcTzAbgikzt1Q5Eu6Gnphj+sXeMYPpr5w5h4VEUV3P2Ql53 JgBNkuiK/7aFnz1vvOxpPefbl5a+PP7hJfHSBxR/hztn0/+DdoFieENqsArajiUk16d0 idLA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id z73si492033oia.40.2020.02.20.15.50.12; Thu, 20 Feb 2020 15:50:25 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729418AbgBTXts (ORCPT + 99 others); Thu, 20 Feb 2020 18:49:48 -0500 Received: from shards.monkeyblade.net ([23.128.96.9]:60390 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729298AbgBTXts (ORCPT ); Thu, 20 Feb 2020 18:49:48 -0500 Received: from localhost (unknown [IPv6:2601:601:9f00:477::3d5]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) (Authenticated sender: davem-davemloft) by shards.monkeyblade.net (Postfix) with ESMTPSA id 4502B15BDA72C; Thu, 20 Feb 2020 15:49:47 -0800 (PST) Date: Thu, 20 Feb 2020 15:49:46 -0800 (PST) Message-Id: <20200220.154946.233139739563491001.davem@davemloft.net> To: rjones@gateworks.com Cc: sgoutham@marvell.com, rrichter@marvell.com, kuba@kernel.org, maciej.fijalkowski@intel.com, linux-arm-kernel@lists.infradead.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, tharvey@gateworks.com Subject: Re: [PATCH net v3] net: thunderx: workaround BGX TX Underflow issue From: David Miller In-Reply-To: <20200219231936.5531-1-rjones@gateworks.com> References: <20200219231936.5531-1-rjones@gateworks.com> X-Mailer: Mew version 6.8 on Emacs 26.1 Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.5.12 (shards.monkeyblade.net [149.20.54.216]); Thu, 20 Feb 2020 15:49:47 -0800 (PST) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Robert Jones Date: Wed, 19 Feb 2020 15:19:36 -0800 > From: Tim Harvey > > While it is not yet understood why a TX underflow can easily occur > for SGMII interfaces resulting in a TX wedge. It has been found that > disabling/re-enabling the LMAC resolves the issue. > > Signed-off-by: Tim Harvey > Reviewed-by: Robert Jones Applied.