From patchwork Tue Nov 4 12:01:36 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiang Liu X-Patchwork-Id: 5226131 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 20479C11AC for ; Tue, 4 Nov 2014 12:01:42 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 2340A2015E for ; Tue, 4 Nov 2014 12:01:41 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 444FA20103 for ; Tue, 4 Nov 2014 12:01:40 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1Xlclw-0002Lh-Al; Tue, 04 Nov 2014 11:59:40 +0000 Received: from mga11.intel.com ([192.55.52.93]) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1Xlclh-00022n-Fv for linux-arm-kernel@lists.infradead.org; Tue, 04 Nov 2014 11:59:26 +0000 Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga102.fm.intel.com with ESMTP; 04 Nov 2014 03:59:25 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.07,313,1413270000"; d="scan'208";a="616764901" Received: from gerry-dev.bj.intel.com ([10.238.158.52]) by fmsmga001.fm.intel.com with ESMTP; 04 Nov 2014 03:59:20 -0800 From: Jiang Liu To: Benjamin Herrenschmidt , Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , "Rafael J. Wysocki" , Bjorn Helgaas , Randy Dunlap , Yinghai Lu , Borislav Petkov , Grant Likely , Marc Zyngier , Yingjoe Chen , Matthias Brugger Subject: [Patch Part2 v4 02/31] irqdomain: Do irq_find_mapping and set_type for hierarchy irqdomain in case OF Date: Tue, 4 Nov 2014 20:01:36 +0800 Message-Id: <1415102525-9898-3-git-send-email-jiang.liu@linux.intel.com> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1415102525-9898-1-git-send-email-jiang.liu@linux.intel.com> References: <1415102525-9898-1-git-send-email-jiang.liu@linux.intel.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20141104_035925_543988_EC4245D0 X-CRM114-Status: GOOD ( 14.70 ) X-Spam-Score: -5.6 (-----) Cc: Tony Luck , Konrad Rzeszutek Wilk , Greg Kroah-Hartman , Joerg Roedel , x86@kernel.org, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, linux-pci@vger.kernel.org, Andrew Morton , Jiang Liu , linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-2.5 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_NONE, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Yingjoe Chen It is possible to call irq_create_of_mapping to create/translate the same IRQ from DT for multiple times. Perform irq_find_mapping check and set_type for hierarchy irqdomain in irq_create_of_mapping() to avoid duplicate these functionality in all outer most irqdomain. Signed-off-by: Yingjoe Chen Signed-off-by: Jiang Liu --- kernel/irq/irqdomain.c | 27 ++++++++++++++++++--------- 1 file changed, 18 insertions(+), 9 deletions(-) diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c index 899150452ae8..e1351b0bd7f8 100644 --- a/kernel/irq/irqdomain.c +++ b/kernel/irq/irqdomain.c @@ -478,11 +478,6 @@ unsigned int irq_create_of_mapping(struct of_phandle_args *irq_data) return 0; } - if (irq_domain_is_hierarchy(domain)) { - virq = irq_domain_alloc_irqs(domain, 1, NUMA_NO_NODE, irq_data); - return virq <= 0 ? 0 : virq; - } - /* If domain has no translation, then we assume interrupt line */ if (domain->ops->xlate == NULL) hwirq = irq_data->args[0]; @@ -492,10 +487,24 @@ unsigned int irq_create_of_mapping(struct of_phandle_args *irq_data) return 0; } - /* Create mapping */ - virq = irq_create_mapping(domain, hwirq); - if (!virq) - return virq; + if (irq_domain_is_hierarchy(domain)) { + /* + * If we've already configured this interrupt, + * don't do it again, or hell will break loose. + */ + virq = irq_find_mapping(domain, hwirq); + if (virq) + return virq; + + virq = irq_domain_alloc_irqs(domain, 1, NUMA_NO_NODE, irq_data); + if (virq <= 0) + return 0; + } else { + /* Create mapping */ + virq = irq_create_mapping(domain, hwirq); + if (!virq) + return virq; + } /* Set type if specified and different than the current one */ if (type != IRQ_TYPE_NONE &&