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=-10.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 A12B9C49ED7 for ; Fri, 13 Sep 2019 09:50:51 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 75C4A2089F for ; Fri, 13 Sep 2019 09:50:51 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="iijOyPNk"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=synopsys.com header.i=@synopsys.com header.b="Un9DyyRC" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 75C4A2089F Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=synopsys.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To: References:List-Owner; bh=3lFn9fbK8UdRbXJpv4Y71n1GN+6rW4u8cN9nHZm5aBg=; b=iij OyPNk+GEeQ2422Vdv18R0md469xMSfphHPYw9pbeyMTKQMDxGVrVjmOG2SG0gD6UAVBy0kH2/xO56 IzRMg1RUi+NBJZLC/fzoyMPlYMfkfyvKxYhl8n6naB/41jdJe/A6951Udhlqeb3eztYk4ovfs/kgI cj2VrpkJAYRJ21wBx8IqiHZfaopGI785nZSEtz1Y/UXCOpY06JroL02aoiFUM19TckBZdwXjA2EJ0 UsQoC1uf1m5Sz/62EQzedykioRryC1+Ul0uUcyV868XjK0ocstJLdDbnU9/7b9BbJ705HpitWaqXp A9i3ObYe0NH8U6uX8soqRwcj+ugrnqw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.2 #3 (Red Hat Linux)) id 1i8iE3-0002CM-Vr; Fri, 13 Sep 2019 09:50:47 +0000 Received: from dc2-smtprelay2.synopsys.com ([198.182.61.142] helo=smtprelay-out1.synopsys.com) by bombadil.infradead.org with esmtps (Exim 4.92.2 #3 (Red Hat Linux)) id 1i8iE1-0002Ab-16 for linux-arm-kernel@lists.infradead.org; Fri, 13 Sep 2019 09:50:46 +0000 Received: from mailhost.synopsys.com (mdc-mailhost1.synopsys.com [10.225.0.209]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) by smtprelay-out1.synopsys.com (Postfix) with ESMTPS id E309AC585C; Fri, 13 Sep 2019 09:50:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=synopsys.com; s=mail; t=1568368243; bh=VNT0CfKOWFVh9wUN9OsP/Ath/shvOWvuL7ZRZxtlnJs=; h=From:To:Cc:Subject:Date:From; b=Un9DyyRCSzZ+BtJTyFzXfYHYaMhQnX66hyzPJ7tJyO3pd2xg9j1D/PHFXEhvO5f5W B5XPmrkD7JgkRHonCx64A4E1kCItZjdmDai34ozetB9McFOfv/UOHJCRe5wxiCJ1fz PpKeWuXqH+z60IL+LxzK8zsh1VvfxPhWFJZZ5D5Iui9abpAXS5zgiXnusKjyiF4Sjg 84Fp5+BGF900G5y+WhZPOLS7OkHRfZWZgerfgu+4P/d1Cd/KhrLRIos4rjmgb0Rqtk 8WbcA9LfVEII3XRdjhhZZk3wy5rBsx/OqBoLVdwR+68KZTHBV25dUfBKd1f8P+tKRg 1V5VWw+vXVoMQ== Received: from de02dwia024.internal.synopsys.com (de02dwia024.internal.synopsys.com [10.225.19.81]) by mailhost.synopsys.com (Postfix) with ESMTP id C1E27A0057; Fri, 13 Sep 2019 09:50:40 +0000 (UTC) From: Jose Abreu To: netdev@vger.kernel.org Subject: [PATCH net] net: stmmac: Hold rtnl lock in suspend/resume callbacks Date: Fri, 13 Sep 2019 11:50:32 +0200 Message-Id: <66b6c1395e4bbc836e80083b89b2189ce7382d7b.1568360548.git.joabreu@synopsys.com> X-Mailer: git-send-email 2.7.4 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190913_025045_079260_E0BB1E16 X-CRM114-Status: GOOD ( 10.23 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Jose Abreu , Joao Pinto , Alexandre Torgue , linux-kernel@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, Christophe ROULLIER , Maxime Coquelin , Giuseppe Cavallaro , "David S. Miller" , linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org We need to hold rnl lock in suspend and resume callbacks because phylink requires it. Otherwise we will get a WARN() in suspend and resume. Also, move phylink start and stop callbacks to inside device's internal lock so that we prevent concurrent HW accesses. Fixes: 74371272f97f ("net: stmmac: Convert to phylink and remove phylib logic") Reported-by: Christophe ROULLIER Tested-by: Christophe ROULLIER Signed-off-by: Jose Abreu --- Cc: Giuseppe Cavallaro Cc: Alexandre Torgue Cc: Jose Abreu Cc: "David S. Miller" Cc: Maxime Coquelin Cc: netdev@vger.kernel.org Cc: linux-stm32@st-md-mailman.stormreply.com Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Cc: Christophe ROULLIER --- drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index fd54c7c87485..b19ab09cb18f 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -4451,10 +4451,12 @@ int stmmac_suspend(struct device *dev) if (!ndev || !netif_running(ndev)) return 0; - phylink_stop(priv->phylink); - mutex_lock(&priv->lock); + rtnl_lock(); + phylink_stop(priv->phylink); + rtnl_unlock(); + netif_device_detach(ndev); stmmac_stop_all_queues(priv); @@ -4558,9 +4560,11 @@ int stmmac_resume(struct device *dev) stmmac_start_all_queues(priv); - mutex_unlock(&priv->lock); - + rtnl_lock(); phylink_start(priv->phylink); + rtnl_unlock(); + + mutex_unlock(&priv->lock); return 0; } -- 2.7.4 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel