From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailapp01.imgtec.com ([195.59.15.196]:19014 "EHLO mailapp01.imgtec.com" rhost-flags-OK-OK-OK-OK) by eddie.linux-mips.org with ESMTP id S23992688AbcISVWUL6Pxp (ORCPT ); Mon, 19 Sep 2016 23:22:20 +0200 From: Paul Burton Subject: [PATCH v2 01/14] irqchip: i8259: Add domain before mapping parent irq Date: Mon, 19 Sep 2016 22:21:18 +0100 Message-ID: <20160919212132.28893-2-paul.burton@imgtec.com> In-Reply-To: <20160919212132.28893-1-paul.burton@imgtec.com> References: <20160919212132.28893-1-paul.burton@imgtec.com> MIME-Version: 1.0 Content-Type: text/plain Return-Path: Sender: linux-mips-bounce@linux-mips.org Errors-to: linux-mips-bounce@linux-mips.org List-help: List-unsubscribe: List-software: Ecartis version 1.0.0 List-subscribe: List-owner: List-post: List-archive: To: linux-mips@linux-mips.org, Ralf Baechle Cc: Paul Burton , Marc Zyngier , Jason Cooper , Thomas Gleixner , linux-kernel@vger.kernel.org Message-ID: <20160919212118.Bf7awY9g9-hfw1TARVaS-Dpjn0oS0oZP9UqJHYKyMmc@z> Mapping the parent IRQ will use a virq number which may conflict with the hardcoded I8259A_IRQ_BASE..I8259A_IRQ_BASE+15 range that the i8259 driver expects to be free. If this occurs then we'll hit errors when adding the i8259 IRQ domain, since one of its virq numbers will already be in use. Avoid this by adding the i8259 domain before mapping the parent IRQ, such that the i8259 virq numbers become used before the parent interrupt controller gets a chance to use any of them. Signed-off-by: Paul Burton --- Changes in v2: None drivers/irqchip/irq-i8259.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/irqchip/irq-i8259.c b/drivers/irqchip/irq-i8259.c index 6b304eb..85897fd 100644 --- a/drivers/irqchip/irq-i8259.c +++ b/drivers/irqchip/irq-i8259.c @@ -370,13 +370,15 @@ int __init i8259_of_init(struct device_node *node, struct device_node *parent) struct irq_domain *domain; unsigned int parent_irq; + domain = __init_i8259_irqs(node); + parent_irq = irq_of_parse_and_map(node, 0); if (!parent_irq) { pr_err("Failed to map i8259 parent IRQ\n"); + irq_domain_remove(domain); return -ENODEV; } - domain = __init_i8259_irqs(node); irq_set_chained_handler_and_data(parent_irq, i8259_irq_dispatch, domain); return 0; -- 2.9.3