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,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 840CBC3F2D7 for ; Tue, 3 Mar 2020 17:44:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5F65820CC7 for ; Tue, 3 Mar 2020 17:44:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1583257492; bh=IO9nZ9LQSp+rwMwlknX2fsvdw8F3hdCvSXPpEBCc1iI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=lwRanhOTQ9Hv9iTU2o92Kx97q84L9M35zPBgtl1MaxO9iPIS4jMleDyq9OSwkEDK2 oBozGFTVg2m3H0lMMSuD1VaBOk30KT7SZsyq3DcGQMHI52MOZUF5ouIZLCfOdiRQil Y8PVWHMjayw4LM4eYFpm8MJyC8gI/NWTTiyGhlmc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730822AbgCCRov (ORCPT ); Tue, 3 Mar 2020 12:44:51 -0500 Received: from mail.kernel.org ([198.145.29.99]:50468 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729311AbgCCRor (ORCPT ); Tue, 3 Mar 2020 12:44:47 -0500 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 C776E214DB; Tue, 3 Mar 2020 17:44:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1583257487; bh=IO9nZ9LQSp+rwMwlknX2fsvdw8F3hdCvSXPpEBCc1iI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PGRzzRFsyL8OjPVl2Qy7GPqNV/vVoLbTZHObESV+m4JABuCBIaeC7vHOTAu4P/XAo XZmzi6K+hI2eeudvgYPAhAxMjUSTHcdvdQV2uq0BAJmhBPUCjt9PuGuH1b9WLkiygs ccx3pAS5FTk3wVUYQiS51O0bI0oq5/LKwonT7URE= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Vasundhara Volam , Michael Chan , "David S. Miller" Subject: [PATCH 5.5 015/176] bnxt_en: Issue PCIe FLR in kdump kernel to cleanup pending DMAs. Date: Tue, 3 Mar 2020 18:41:19 +0100 Message-Id: <20200303174306.342265984@linuxfoundation.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200303174304.593872177@linuxfoundation.org> References: <20200303174304.593872177@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: Vasundhara Volam [ Upstream commit 8743db4a9acfd51f805ac0c87bcaae92c42d1061 ] If crashed kernel does not shutdown the NIC properly, PCIe FLR is required in the kdump kernel in order to initialize all the functions properly. Fixes: d629522e1d66 ("bnxt_en: Reduce memory usage when running in kdump kernel.") Signed-off-by: Vasundhara Volam Signed-off-by: Michael Chan Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/broadcom/bnxt/bnxt.c | 8 ++++++++ 1 file changed, 8 insertions(+) --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c @@ -11775,6 +11775,14 @@ static int bnxt_init_one(struct pci_dev if (version_printed++ == 0) pr_info("%s", version); + /* Clear any pending DMA transactions from crash kernel + * while loading driver in capture kernel. + */ + if (is_kdump_kernel()) { + pci_clear_master(pdev); + pcie_flr(pdev); + } + max_irqs = bnxt_get_max_irq(pdev); dev = alloc_etherdev_mq(sizeof(*bp), max_irqs); if (!dev)