Message ID | 20201124061720.86766-1-aik@ozlabs.ru |
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Headers | show
Return-Path: <linux-gpio-owner@kernel.org> X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 65CC5C56201 for <linux-gpio@archiver.kernel.org>; Tue, 24 Nov 2020 06:27:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1F2FC20897 for <linux-gpio@archiver.kernel.org>; Tue, 24 Nov 2020 06:27:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727771AbgKXG1i (ORCPT <rfc822; linux-gpio@archiver.kernel.org>); Tue, 24 Nov 2020 01:27:38 -0500 Received: from ozlabs.ru ([107.174.27.60]:51270 "EHLO ozlabs.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728206AbgKXG1i (ORCPT <rfc822;linux-gpio@vger.kernel.org>); Tue, 24 Nov 2020 01:27:38 -0500 Received: from fstn1-p1.ozlabs.ibm.com (localhost [IPv6:::1]) by ozlabs.ru (Postfix) with ESMTP id 28792AE80001; Tue, 24 Nov 2020 01:17:29 -0500 (EST) From: Alexey Kardashevskiy <aik@ozlabs.ru> To: linux-kernel@vger.kernel.org Cc: =?utf-8?q?C=C3=A9dric_Le_Goater?= <clg@kaod.org>, Frederic Barrat <fbarrat@linux.ibm.com>, =?utf-8?q?Michal_Such?= =?utf-8?b?w6FuZWs=?= <msuchanek@suse.de>, "Oliver O'Halloran" <oohall@gmail.com>, Marc Zyngier <maz@kernel.org>, Thomas Gleixner <tglx@linutronix.de>, linux-arm-kernel@lists.infradead.org, linux-gpio@vger.kernel.org, x86@kernel.org, linuxppc-dev@lists.ozlabs.org, Alexey Kardashevskiy <aik@ozlabs.ru> Subject: [PATCH kernel v4 0/8] genirq/irqdomain: Add reference counting to IRQs Date: Tue, 24 Nov 2020 17:17:12 +1100 Message-Id: <20201124061720.86766-1-aik@ozlabs.ru> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: <linux-gpio.vger.kernel.org> X-Mailing-List: linux-gpio@vger.kernel.org |
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genirq/irqdomain: Add reference counting to IRQs
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This references an irq_desc if already mapped interrupt requested to map again. This happends for PCI legacy interrupts where 4 interrupts are shared among all devices on the same PCI host bus adapter.