From patchwork Fri Feb 9 06:23:58 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexey Kardashevskiy X-Patchwork-Id: 871219 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 3zd4lV0KTmz9s7M for ; Fri, 9 Feb 2018 17:24:05 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750878AbeBIGYE (ORCPT ); Fri, 9 Feb 2018 01:24:04 -0500 Received: from ozlabs.ru ([107.173.13.209]:36180 "EHLO ozlabs.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750830AbeBIGYD (ORCPT ); Fri, 9 Feb 2018 01:24:03 -0500 Received: from vpl1.ozlabs.ibm.com (localhost [IPv6:::1]) by ozlabs.ru (Postfix) with ESMTP id 17CF33A60020; Fri, 9 Feb 2018 01:24:02 -0500 (EST) From: Alexey Kardashevskiy To: linuxppc-dev@lists.ozlabs.org Cc: Alexey Kardashevskiy , Benjamin Herrenschmidt , Bjorn Helgaas , Michael Ellerman , Rob Herring , linux-pci@vger.kernel.org Subject: [PATCH kernel v3] powerpc/pci: Fix broken INTx configuration via OF Date: Fri, 9 Feb 2018 17:23:58 +1100 Message-Id: <20180209062358.33457-1-aik@ozlabs.ru> X-Mailer: git-send-email 2.11.0 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Commit 59f47eff03a0 ("powerpc/pci: Use of_irq_parse_and_map_pci() helper") replaced of_irq_parse_pci() + irq_create_of_mapping() with of_irq_parse_and_map_pci() but this change lost virq returned by irq_create_of_mapping() so virq remained zero causing INTx misconfiguration. This fixes pci_read_irq_line() not to loose a virq returned by of_irq_parse_and_map_pci(). Fixes: 59f47eff03a0 "powerpc/pci: Use of_irq_parse_and_map_pci() helper" Signed-off-by: Alexey Kardashevskiy --- Changes: v3: * change virq from unsigned to int as of_irq_parse_and_map_pci returns int and even though it only returns non-negative values now, this may change in the future v2: * changed the condition from <=0 to !=0 as by design of_irq_parse_and_map_pci() can only return 0 for an error and virq>0. --- arch/powerpc/kernel/pci-common.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c index ae2ede4..446c796 100644 --- a/arch/powerpc/kernel/pci-common.c +++ b/arch/powerpc/kernel/pci-common.c @@ -362,7 +362,7 @@ struct pci_controller* pci_find_hose_for_OF_device(struct device_node* node) */ static int pci_read_irq_line(struct pci_dev *pci_dev) { - unsigned int virq = 0; + int virq; pr_debug("PCI: Try to map irq for %s...\n", pci_name(pci_dev)); @@ -370,7 +370,8 @@ static int pci_read_irq_line(struct pci_dev *pci_dev) memset(&oirq, 0xff, sizeof(oirq)); #endif /* Try to get a mapping from the device-tree */ - if (!of_irq_parse_and_map_pci(pci_dev, 0, 0)) { + virq = of_irq_parse_and_map_pci(pci_dev, 0, 0); + if (virq <= 0) { u8 line, pin; /* If that fails, lets fallback to what is in the config