From patchwork Thu Oct 21 15:07:48 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Naveen Naidu X-Patchwork-Id: 1544433 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: bilbo.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20210112 header.b=Pz90wycD; dkim-atps=neutral Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by bilbo.ozlabs.org (Postfix) with ESMTP id 4HZrdk2H0kz9sRR for ; Fri, 22 Oct 2021 02:15:38 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231934AbhJUPRv (ORCPT ); Thu, 21 Oct 2021 11:17:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49744 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232116AbhJUPRj (ORCPT ); Thu, 21 Oct 2021 11:17:39 -0400 Received: from mail-pg1-x535.google.com (mail-pg1-x535.google.com [IPv6:2607:f8b0:4864:20::535]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2ED38C06122F; Thu, 21 Oct 2021 08:15:09 -0700 (PDT) Received: by mail-pg1-x535.google.com with SMTP id q5so596633pgr.7; Thu, 21 Oct 2021 08:15:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=rnLnMx9TiMvb2DdIMVT7WpH5F3wdHvIfMbTto6KwZSg=; b=Pz90wycD5upk/N58ukfuJBvjKYqKsAyX4N450DRmxX4zYZVm0RPibszRSrLn5sdpI9 FKZ+aPYSXF/Or6ZgkVzut9V3jpVIXKsuc/v3DQFo55OOxou9RnWIX3+FDU31DvOeZgKY +/2F5azh1KpxVUTG5N9u9SpciwITX0Jsknvx/RPRbr74yQvxjl2WfIJ9fBN0HE4nSee7 P5CXaEc+60zwqa1WGjVapTn3Si4vLCdcvmI/EfEGrUXwTl7bQuj2hQpMOKlV9O1TWpIN Ge3lkIG02jxKfxrY3FzNMJYMUb0SA+miwzfSn1dbx2nfplo046yERVVHhtXn/9PDdXje yiqQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=rnLnMx9TiMvb2DdIMVT7WpH5F3wdHvIfMbTto6KwZSg=; b=cd6zCYo9MDrqpjhuRY1liUs+k1YlBEKK+9DHIV6ruGfuy1ihKfEJjmPSBBGRNIGYaX FVhKUrdSZnoGzc7rwfxP+RmZOTZV7o3EEN1glAJE/WoGl4KmV5XVABs/nDQyyXvAdTFR 9cyNT9dxFwoJkDC0ZiRGdhlPfIWIoClG5BnPT6CCv6Y8w6o9Vkfu1VdGu4kbLisVUxvn UZ0q/DmdfOzRYCfG7hPTLK4K1gFba/sAu9ZyxvPXjMu8f0wdW7n18EdmLdk1dEBgzaUH QmzPeQPFsNxbczct8j3MLbh2UHLuY6G9Qi0Z/gqKxZ7YiclAT+ahKLg9LelHYh7BAxYJ PDmg== X-Gm-Message-State: AOAM531mi5JG/fsJTXHKBrox+7zi9i2lOLb6tKkVOBLtbNZ23fXqIa8R 1ix9/JgB3i1D2mrvClhSofoqiszB4a1Mw9ZK X-Google-Smtp-Source: ABdhPJxhnoG9TmriCOt6ZGRxqyZUvT6HOxT0Utz32C1JLwzEnJCfreF0x30Y/PMIEkJMKLIaaf9lXA== X-Received: by 2002:a05:6a00:852:b0:46c:d325:e95b with SMTP id q18-20020a056a00085200b0046cd325e95bmr4500656pfk.78.1634829308613; Thu, 21 Oct 2021 08:15:08 -0700 (PDT) Received: from localhost.localdomain ([2406:7400:63:29a4:d874:a949:6890:f95f]) by smtp.gmail.com with ESMTPSA id c9sm5508027pgq.58.2021.10.21.08.15.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 21 Oct 2021 08:15:08 -0700 (PDT) From: Naveen Naidu To: bhelgaas@google.com Cc: Naveen Naidu , linux-kernel-mentees@lists.linuxfoundation.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, skhan@linuxfoundation.org, Lorenzo Pieralisi , Rob Herring , =?utf-8?q?Krzysztof_Wilczy=C5=84ski?= , Jingoo Han , Marc Zyngier , Kishon Vijay Abraham I Subject: [PATCH v3 23/25] PCI: keystone: Use PCI_ERROR_RESPONSE to specify hardware error Date: Thu, 21 Oct 2021 20:37:48 +0530 Message-Id: X-Mailer: git-send-email 2.25.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Include PCI_ERROR_RESPONSE along with 0xffffffff in the comment to specify a hardware error. This makes MMIO read errors easier to find. Signed-off-by: Naveen Naidu --- drivers/pci/controller/dwc/pci-keystone.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/pci/controller/dwc/pci-keystone.c b/drivers/pci/controller/dwc/pci-keystone.c index 865258d8c53c..25b11610b500 100644 --- a/drivers/pci/controller/dwc/pci-keystone.c +++ b/drivers/pci/controller/dwc/pci-keystone.c @@ -748,8 +748,8 @@ static int ks_pcie_config_legacy_irq(struct keystone_pcie *ks_pcie) #ifdef CONFIG_ARM /* * When a PCI device does not exist during config cycles, keystone host gets a - * bus error instead of returning 0xffffffff. This handler always returns 0 - * for this kind of faults. + * bus error instead of returning 0xffffffff (PCI_ERROR_RESPONSE). + * This handler always returns 0 for this kind of faults. */ static int ks_pcie_fault(unsigned long addr, unsigned int fsr, struct pt_regs *regs)