From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1CDBBC433E2 for ; Thu, 2 Jul 2020 01:28:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D83A2206BE for ; Thu, 2 Jul 2020 01:28:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1593653315; bh=El9OysCfIUZX9iH2PPNwdGqJu/otsnHDNnicWVQlxOU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=zVqriI3GHQTTNpkpF6E+NXqFrb8+uE1uW8t2Pp7V+4aJ1kiBfDyeyV+6Kqx3Ak1x/ 5FqCoNCiO+7DzAse0TAcfApjEpz8wNbnG99lxPtVjo8D+3IJg1ilgrS2Kt8kI943nl qs8DMwsPa8Cn78dJv3CYAc+LqziNDZhVEG9/D1jU= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729549AbgGBB1j (ORCPT ); Wed, 1 Jul 2020 21:27:39 -0400 Received: from mail.kernel.org ([198.145.29.99]:59568 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728683AbgGBB1g (ORCPT ); Wed, 1 Jul 2020 21:27:36 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 66E2F21473; Thu, 2 Jul 2020 01:27:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1593653256; bh=El9OysCfIUZX9iH2PPNwdGqJu/otsnHDNnicWVQlxOU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=tCavyok7QKUv5CfwqtUwxQQfelEccBSuVvEidGGg58yNS3tFl3H/YL6kUQloLAji2 yj65fP7Zev8NJ8ARHuv4Z2YwW39AfrgFAz++BXWLc/bepM1MyemmbNaYFvDYFIr3AD oVWmpUGThQc8aQfzqUuuBrItHI1nokdNkULaox7k= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: David Christensen , Michael Chan , "David S . Miller" , Sasha Levin , netdev@vger.kernel.org Subject: [PATCH AUTOSEL 4.4 5/7] tg3: driver sleeps indefinitely when EEH errors exceed eeh_max_freezes Date: Wed, 1 Jul 2020 21:27:27 -0400 Message-Id: <20200702012729.2702141-5-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200702012729.2702141-1-sashal@kernel.org> References: <20200702012729.2702141-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: David Christensen [ Upstream commit 3a2656a211caf35e56afc9425e6e518fa52f7fbc ] The driver function tg3_io_error_detected() calls napi_disable twice, without an intervening napi_enable, when the number of EEH errors exceeds eeh_max_freezes, resulting in an indefinite sleep while holding rtnl_lock. Add check for pcierr_recovery which skips code already executed for the "Frozen" state. Signed-off-by: David Christensen Reviewed-by: Michael Chan Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/broadcom/tg3.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c index 58102e96ac5cd..e198427d0f292 100644 --- a/drivers/net/ethernet/broadcom/tg3.c +++ b/drivers/net/ethernet/broadcom/tg3.c @@ -18182,8 +18182,8 @@ static pci_ers_result_t tg3_io_error_detected(struct pci_dev *pdev, rtnl_lock(); - /* We probably don't have netdev yet */ - if (!netdev || !netif_running(netdev)) + /* Could be second call or maybe we don't have netdev yet */ + if (!netdev || tp->pcierr_recovery || !netif_running(netdev)) goto done; /* We needn't recover from permanent error */ -- 2.25.1