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,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 14D72C3F2D2 for ; Tue, 3 Mar 2020 02:56:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D5748217F4 for ; Tue, 3 Mar 2020 02:56:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1583204184; bh=wvIZGTrfVEJX+/h/0jYTc6W39qvqgiRTacB6jjgXu9c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=UtsVb/mV34CyqAMhB38f0+HAVPrLhvNrYyJK1v+hf7Nn78htun6jGK+mUde53J3yk l2wN8x4/ENX+DI9yUE/5yDzZqyXtZsRH8PYEyBaSEBr1BiDShUo2uQnyjiG3FRnN9b 4pYPC++uoRZaoPDBBPxU1ms7OeYocZ6w0mpzRjic= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728711AbgCCC4V (ORCPT ); Mon, 2 Mar 2020 21:56:21 -0500 Received: from mail.kernel.org ([198.145.29.99]:44566 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728516AbgCCCsn (ORCPT ); Mon, 2 Mar 2020 21:48:43 -0500 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 BB250246A1; Tue, 3 Mar 2020 02:48:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1583203722; bh=wvIZGTrfVEJX+/h/0jYTc6W39qvqgiRTacB6jjgXu9c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=CD8yD6WCNdyAVZvkGuFRuJ5j9FTEcH11DoFzfjvM+xL1XvM5RZGiF8UWlde1JswuA LzqpUFIUW4P/PU8C9GGijpOrZ9e8r/Ir3vBGSZ9byg5tXvFzgEl4ir8TF3iNbCooGW wUWfjWCo6G37IZW85g32ljG/q4qn8usMZIxN4Odk= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Vasundhara Volam , Michael Chan , "David S . Miller" , Sasha Levin , netdev@vger.kernel.org Subject: [PATCH AUTOSEL 5.4 51/58] bnxt_en: Issue PCIe FLR in kdump kernel to cleanup pending DMAs. Date: Mon, 2 Mar 2020 21:47:33 -0500 Message-Id: <20200303024740.9511-51-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200303024740.9511-1-sashal@kernel.org> References: <20200303024740.9511-1-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: 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: Sasha Levin --- drivers/net/ethernet/broadcom/bnxt/bnxt.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c index e03e610dd1831..374e11a91790b 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c @@ -11712,6 +11712,14 @@ static int bnxt_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) 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) -- 2.20.1