From patchwork Wed Sep 18 13:24:45 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thierry Reding X-Patchwork-Id: 2906891 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 C949BBFF05 for ; Wed, 18 Sep 2013 13:28:31 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 0A7CB20340 for ; Wed, 18 Sep 2013 13:28:27 +0000 (UTC) Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 58DAE20399 for ; Wed, 18 Sep 2013 13:28:25 +0000 (UTC) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1VMHn5-0005bM-C4; Wed, 18 Sep 2013 13:27:36 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1VMHmp-0002Vb-Qk; Wed, 18 Sep 2013 13:27:19 +0000 Received: from mail-bk0-f54.google.com ([209.85.214.54]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1VMHmT-0002OI-Ug for linux-arm-kernel@lists.infradead.org; Wed, 18 Sep 2013 13:26:59 +0000 Received: by mail-bk0-f54.google.com with SMTP id mz12so2805262bkb.41 for ; Wed, 18 Sep 2013 06:26:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=ib/4v+CjPp1P4ER/45ABUDMRnxysMzLeF2WSfIGtBIE=; b=x40NrtZU67sEzHxiMffmXpjNgwSPAOSGJ8Ojvccih5tVPlJIiOwykrEQr3n9nvws6M 5VSUdHk5ILPmwanq6Dat/AkbANXAr4X5152XvBfCzyLeQ4h82l+w1Ktpf32vwkba7h9x r6ape23InlJEFaTZPSaUhSYvrgoUtD9sGmP8GSGlNKkAMwjmkYgR+cMcsU8qIFdFEn4r QUQcg6GBunO5kGwR+3hkcHlSCuEJTlSJLpoaT7Rx4IJboRmwL/n8KOzgvWRrs8MHOofv GHzeR7nHaZQ4/n0evTtYZYmZVxrnb4o3qPyFAYaNguYOOnOyZRrFUdAwrIqLb3GOEgX1 6mzA== X-Received: by 10.204.167.74 with SMTP id p10mr12526787bky.26.1379510780265; Wed, 18 Sep 2013 06:26:20 -0700 (PDT) Received: from localhost (port-55509.pppoe.wtnet.de. [46.59.217.135]) by mx.google.com with ESMTPSA id rj5sm899425bkb.9.1969.12.31.16.00.00 (version=TLSv1.2 cipher=RC4-SHA bits=128/128); Wed, 18 Sep 2013 06:26:19 -0700 (PDT) From: Thierry Reding To: Rob Herring , Grant Likely , Greg Kroah-Hartman , Thomas Gleixner Subject: [PATCH v2 03/10] irqdomain: Introduce __irq_create_mapping() Date: Wed, 18 Sep 2013 15:24:45 +0200 Message-Id: <1379510692-32435-4-git-send-email-treding@nvidia.com> X-Mailer: git-send-email 1.8.4 In-Reply-To: <1379510692-32435-1-git-send-email-treding@nvidia.com> References: <1379510692-32435-1-git-send-email-treding@nvidia.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20130918_092658_137524_B8C47D44 X-CRM114-Status: GOOD ( 16.28 ) X-Spam-Score: 0.9 (/) Cc: linux-mips@linux-mips.org, Russell King , devicetree@vger.kernel.org, Benjamin Herrenschmidt , linux-kernel@vger.kernel.org, Ralf Baechle , sparclinux@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 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=-1.1 required=5.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED, FREEMAIL_FROM, KHOP_BIG_TO_CC, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, T_DKIM_INVALID,UNPARSEABLE_RELAY autolearn=no 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 This is a version of irq_create_mapping() that propagates the precise error code instead of returning 0 for all errors. It will be used in subsequent patches to allow further propagation of error codes. To avoid code duplication, implement irq_create_mapping() as a wrapper around the new __irq_create_mapping(). Signed-off-by: Thierry Reding --- kernel/irq/irqdomain.c | 59 +++++++++++++++++++++++++++++++++----------------- 1 file changed, 39 insertions(+), 20 deletions(-) diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c index 706724e..d2a3b01 100644 --- a/kernel/irq/irqdomain.c +++ b/kernel/irq/irqdomain.c @@ -374,30 +374,21 @@ unsigned int irq_create_direct_mapping(struct irq_domain *domain) } EXPORT_SYMBOL_GPL(irq_create_direct_mapping); -/** - * irq_create_mapping() - Map a hardware interrupt into linux irq space - * @domain: domain owning this hardware interrupt or NULL for default domain - * @hwirq: hardware irq number in that domain space - * - * Only one mapping per hardware interrupt is permitted. Returns a linux - * irq number. - * If the sense/trigger is to be specified, set_irq_type() should be called - * on the number returned from that call. - */ -unsigned int irq_create_mapping(struct irq_domain *domain, - irq_hw_number_t hwirq) +static int __irq_create_mapping(struct irq_domain *domain, + irq_hw_number_t hwirq, unsigned int *virqp) { - unsigned int hint; - int virq; + unsigned int hint, virq; + int ret; - pr_debug("irq_create_mapping(0x%p, 0x%lx)\n", domain, hwirq); + pr_debug("__irq_create_mapping(0x%p, 0x%lx, %p)\n", domain, hwirq, + virqp); /* Look for default domain if nececssary */ if (domain == NULL) domain = irq_default_domain; if (domain == NULL) { WARN(1, "%s(, %lx) called with NULL domain\n", __func__, hwirq); - return 0; + return -ENODEV; } pr_debug("-> using domain @%p\n", domain); @@ -405,7 +396,11 @@ unsigned int irq_create_mapping(struct irq_domain *domain, virq = irq_find_mapping(domain, hwirq); if (virq) { pr_debug("-> existing mapping on virq %d\n", virq); - return virq; + + if (virqp) + *virqp = virq; + + return 0; } /* Allocate a virtual interrupt number */ @@ -417,17 +412,41 @@ unsigned int irq_create_mapping(struct irq_domain *domain, virq = irq_alloc_desc_from(1, of_node_to_nid(domain->of_node)); if (virq <= 0) { pr_debug("-> virq allocation failed\n"); - return 0; + return virq ? : -ENOSPC; } - if (irq_domain_associate(domain, virq, hwirq)) { + ret = irq_domain_associate(domain, virq, hwirq); + if (ret) { irq_free_desc(virq); - return 0; + return ret; } pr_debug("irq %lu on domain %s mapped to virtual irq %u\n", hwirq, of_node_full_name(domain->of_node), virq); + if (virqp) + *virqp = virq; + + return 0; +} +/** + * irq_create_mapping() - Map a hardware interrupt into linux irq space + * @domain: domain owning this hardware interrupt or NULL for default domain + * @hwirq: hardware irq number in that domain space + * + * Only one mapping per hardware interrupt is permitted. Returns a linux + * irq number. + * If the sense/trigger is to be specified, set_irq_type() should be called + * on the number returned from that call. + */ +unsigned int irq_create_mapping(struct irq_domain *domain, + irq_hw_number_t hwirq) +{ + unsigned int virq; + + if (__irq_create_mapping(domain, hwirq, &virq)) + return 0; + return virq; } EXPORT_SYMBOL_GPL(irq_create_mapping);