From patchwork Wed Aug 30 14:24:53 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jan Glauber X-Patchwork-Id: 807659 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3xj79d5Tbgz9s7f for ; Thu, 31 Aug 2017 00:26:45 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751525AbdH3O01 (ORCPT ); Wed, 30 Aug 2017 10:26:27 -0400 Received: from mail-wm0-f66.google.com ([74.125.82.66]:34899 "EHLO mail-wm0-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751686AbdH3OZL (ORCPT ); Wed, 30 Aug 2017 10:25:11 -0400 Received: by mail-wm0-f66.google.com with SMTP id e204so1978615wma.2; Wed, 30 Aug 2017 07:25:11 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=Gpp9j+xHs+YKdmKAmr9f20Tm/49tQR4QPKIbT2gm1gE=; b=EOT8JT8yG6ytHnasUPN/E2v26keqeL9IT6XQ4iLr67mQb698mE5llpultd14ZJ31CE xp6ibgav6RkzzoTe/Mq5uwxTD4/f7nautk/je7E0HL+DA7eNjL5bC8mvbiBqENuo33xC sAZBxasG8nxdslpQc4qvWsF1tRKbyNpdYhzzPY4voZNYJAGiuPzu/f4VSART2KFXE/l5 Hqq/TI22lanPg4tvophbzOB/6CmJr0ec5BbH5+oITooB3urWnZMv589OJkVM/UTcJyeG 3iOTy+dGb4+df1Qtcm1IR4hLeUeiyEFuNPI10gQ9x4pzxSIYDPQyl8iQiWsSynZgjzPx Xv+Q== X-Gm-Message-State: AHYfb5ibNOAMGfEefRloR88tT+mYME4BD1oMYUnQR6NojzrQEupkQjnu /P3qQVRNh1rW0Awv X-Received: by 10.28.159.141 with SMTP id i135mr1397498wme.153.1504103110511; Wed, 30 Aug 2017 07:25:10 -0700 (PDT) Received: from hc.fritz.box (HSI-KBW-46-223-66-184.hsi.kabel-badenwuerttemberg.de. [46.223.66.184]) by smtp.gmail.com with ESMTPSA id p105sm97012wrc.64.2017.08.30.07.25.09 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 30 Aug 2017 07:25:10 -0700 (PDT) From: Jan Glauber To: Bjorn Helgaas Cc: linux-pci@vger.kernel.org, Alex Williamson , linux-kernel@vger.kernel.org, david.daney@cavium.com, Jon Masters , Robert Richter , linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org, Jan Glauber Subject: [PATCH v3 2/3] PCI: Avoid bus reset for Cavium cn8xxx root ports Date: Wed, 30 Aug 2017 16:24:53 +0200 Message-Id: <20170830142454.10971-3-jglauber@cavium.com> X-Mailer: git-send-email 2.9.0.rc0.21.g7777322 In-Reply-To: <20170830142454.10971-1-jglauber@cavium.com> References: <20170830142454.10971-1-jglauber@cavium.com> Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org From: David Daney Root ports of cn8xxx do not function after bus reset when used with some e1000e and LSI HBA devices. Add a quirk to prevent bus reset on these root ports. Signed-off-by: David Daney [jglauber@cavium.com: fixed typo and whitespaces] Signed-off-by: Jan Glauber --- drivers/pci/quirks.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 6967c6b..85191b8 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -3364,6 +3364,14 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATHEROS, 0x0032, quirk_no_bus_reset); DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATHEROS, 0x003c, quirk_no_bus_reset); DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATHEROS, 0x0033, quirk_no_bus_reset); +/* + * Root port on some Cavium CN8xxx chips do not successfully complete + * a bus reset when used with certain types of child devices. Config + * space access to the child may quit responding. Flag the root port + * as not supporting bus reset. + */ +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_CAVIUM, 0xa100, quirk_no_bus_reset); + static void quirk_no_pm_reset(struct pci_dev *dev) { /*