From patchwork Wed Jul 4 08:14:50 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vladimir Zapolskiy X-Patchwork-Id: 10506113 X-Patchwork-Delegate: geert@linux-m68k.org Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 15753603D7 for ; Wed, 4 Jul 2018 08:15:45 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 03AC428CAC for ; Wed, 4 Jul 2018 08:15:45 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id EC5A928D1D; Wed, 4 Jul 2018 08:15:44 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9669328CAC for ; Wed, 4 Jul 2018 08:15:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932363AbeGDIPn (ORCPT ); Wed, 4 Jul 2018 04:15:43 -0400 Received: from relay1.mentorg.com ([192.94.38.131]:42833 "EHLO relay1.mentorg.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933746AbeGDIP0 (ORCPT ); Wed, 4 Jul 2018 04:15:26 -0400 Received: from nat-ies.mentorg.com ([192.94.31.2] helo=SVR-IES-MBX-04.mgc.mentorg.com) by relay1.mentorg.com with esmtps (TLSv1.2:ECDHE-RSA-AES256-SHA384:256) id 1facwf-0002Et-VP from Vladimir_Zapolskiy@mentor.com ; Wed, 04 Jul 2018 01:15:25 -0700 Received: from eyas.local (137.202.0.87) by SVR-IES-MBX-04.mgc.mentorg.com (139.181.222.4) with Microsoft SMTP Server (TLS) id 15.0.1320.4; Wed, 4 Jul 2018 09:15:21 +0100 From: Vladimir Zapolskiy To: Sergei Shtylyov , "David S . Miller" CC: Andrew Lunn , Geert Uytterhoeven , , Subject: [PATCH v2 08/14] ravb: fix invalid context bug while calling auto-negotiation by ethtool Date: Wed, 4 Jul 2018 11:14:50 +0300 Message-ID: <20180704081451.7482-4-vladimir_zapolskiy@mentor.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20180704081245.7395-1-vladimir_zapolskiy@mentor.com> References: <20180704081245.7395-1-vladimir_zapolskiy@mentor.com> MIME-Version: 1.0 X-Originating-IP: [137.202.0.87] X-ClientProxiedBy: svr-ies-mbx-01.mgc.mentorg.com (139.181.222.1) To SVR-IES-MBX-04.mgc.mentorg.com (139.181.222.4) Sender: linux-renesas-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Since commit 35b5f6b1a82b ("PHYLIB: Locking fixes for PHY I/O potentially sleeping") phy_start_aneg() function utilizes a mutex to serialize changes to phy state, however the helper function is called in atomic context. The bug can be reproduced by running "ethtool -r" command, the bug is reported if CONFIG_DEBUG_ATOMIC_SLEEP build option is enabled. Fixes: a0d2f20650e8 ("Renesas Ethernet AVB PTP clock driver") Signed-off-by: Vladimir Zapolskiy Reviewed-by: Sergei Shtylyov --- drivers/net/ethernet/renesas/ravb_main.c | 7 +------ 1 file changed, 1 insertion(+), 6 deletions(-) diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c index 68f122140966..e7d6d1b6e7d6 100644 --- a/drivers/net/ethernet/renesas/ravb_main.c +++ b/drivers/net/ethernet/renesas/ravb_main.c @@ -1152,15 +1152,10 @@ static int ravb_set_link_ksettings(struct net_device *ndev, static int ravb_nway_reset(struct net_device *ndev) { - struct ravb_private *priv = netdev_priv(ndev); int error = -ENODEV; - unsigned long flags; - if (ndev->phydev) { - spin_lock_irqsave(&priv->lock, flags); + if (ndev->phydev) error = phy_start_aneg(ndev->phydev); - spin_unlock_irqrestore(&priv->lock, flags); - } return error; }