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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,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 5F1DFC433E0 for ; Tue, 16 Jun 2020 15:46:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 41E3020E65 for ; Tue, 16 Jun 2020 15:46:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592322364; bh=3BJXFnP87UZKn8ENKzqjnUT3+34W9W2CSAw12RCNTDE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=f5IPSkAEurNRgDv+bVjD3QlzZ1Y8q3+p1UgkVBDqiaeQWy/k3lMcxLo+arn8I47IP 0pkNCCrVwoBhBKzHYvcs3kb9e8Wxd8jWIb1VwbekMdcbcJmb0vc5fldwnqztKba8fN 0ypl6M9AkvcepuTMZic+uB+qN1L4VfHkM101/d0Q= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732148AbgFPPqC (ORCPT ); Tue, 16 Jun 2020 11:46:02 -0400 Received: from mail.kernel.org ([198.145.29.99]:37574 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731250AbgFPPpz (ORCPT ); Tue, 16 Jun 2020 11:45:55 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id A38BD2071A; Tue, 16 Jun 2020 15:45:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592322355; bh=3BJXFnP87UZKn8ENKzqjnUT3+34W9W2CSAw12RCNTDE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=X17RHW9x5kn10aMOGJzfLu63J6CMkmcxOi/vCqc03MUv8S1A2/kqGOh1AIk/CzynI OzT9KrzcyUbCwK5Zpbrg5splLJ60h3TxVG2sks7TscxXcaJwBf0p+LyTxuzn8uIXGo F6uKWSBzoVvXkiz1isGFroJH4jDwvVabTG+V43iQ= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Lorenzo Bianconi , "David S. Miller" Subject: [PATCH 5.7 100/163] net: mvneta: do not redirect frames during reconfiguration Date: Tue, 16 Jun 2020 17:34:34 +0200 Message-Id: <20200616153111.613486263@linuxfoundation.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200616153106.849127260@linuxfoundation.org> References: <20200616153106.849127260@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Lorenzo Bianconi [ Upstream commit 62a502cc91f97e3ffd312d9b42e8d01a137c63ff ] Disable frames injection in mvneta_xdp_xmit routine during hw re-configuration in order to avoid hardware hangs Fixes: b0a43db9087a ("net: mvneta: add XDP_TX support") Signed-off-by: Lorenzo Bianconi Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/marvell/mvneta.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) --- a/drivers/net/ethernet/marvell/mvneta.c +++ b/drivers/net/ethernet/marvell/mvneta.c @@ -451,11 +451,17 @@ struct mvneta_pcpu_port { u32 cause_rx_tx; }; +enum { + __MVNETA_DOWN, +}; + struct mvneta_port { u8 id; struct mvneta_pcpu_port __percpu *ports; struct mvneta_pcpu_stats __percpu *stats; + unsigned long state; + int pkt_size; void __iomem *base; struct mvneta_rx_queue *rxqs; @@ -2112,6 +2118,9 @@ mvneta_xdp_xmit(struct net_device *dev, struct netdev_queue *nq; u32 ret; + if (unlikely(test_bit(__MVNETA_DOWN, &pp->state))) + return -ENETDOWN; + if (unlikely(flags & ~XDP_XMIT_FLAGS_MASK)) return -EINVAL; @@ -3562,12 +3571,16 @@ static void mvneta_start_dev(struct mvne phylink_start(pp->phylink); netif_tx_start_all_queues(pp->dev); + + clear_bit(__MVNETA_DOWN, &pp->state); } static void mvneta_stop_dev(struct mvneta_port *pp) { unsigned int cpu; + set_bit(__MVNETA_DOWN, &pp->state); + phylink_stop(pp->phylink); if (!pp->neta_armada3700) {