From patchwork Fri Dec 24 14:29:07 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Prabhakar Mahadev Lad X-Patchwork-Id: 528112 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D7DFBC433EF for ; Fri, 24 Dec 2021 14:29:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1352912AbhLXO3p (ORCPT ); Fri, 24 Dec 2021 09:29:45 -0500 Received: from relmlor2.renesas.com ([210.160.252.172]:42238 "EHLO relmlie6.idc.renesas.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1352910AbhLXO3o (ORCPT ); Fri, 24 Dec 2021 09:29:44 -0500 X-IronPort-AV: E=Sophos;i="5.88,232,1635174000"; d="scan'208";a="105108383" Received: from unknown (HELO relmlir5.idc.renesas.com) ([10.200.68.151]) by relmlie6.idc.renesas.com with ESMTP; 24 Dec 2021 23:29:43 +0900 Received: from localhost.localdomain (unknown [10.226.36.204]) by relmlir5.idc.renesas.com (Postfix) with ESMTP id 82AE14000ABD; Fri, 24 Dec 2021 23:29:41 +0900 (JST) From: Lad Prabhakar To: linux-serial@vger.kernel.org, Tobias Klauser , Greg Kroah-Hartman , Jiri Slaby Cc: Rob Herring , linux-kernel@vger.kernel.org, Prabhakar , Lad Prabhakar Subject: [PATCH 01/10] serial: altera: Use platform_get_irq_optional() to get the interrupt Date: Fri, 24 Dec 2021 14:29:07 +0000 Message-Id: <20211224142917.6966-2-prabhakar.mahadev-lad.rj@bp.renesas.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20211224142917.6966-1-prabhakar.mahadev-lad.rj@bp.renesas.com> References: <20211224142917.6966-1-prabhakar.mahadev-lad.rj@bp.renesas.com> Precedence: bulk List-ID: X-Mailing-List: linux-serial@vger.kernel.org platform_get_resource(pdev, IORESOURCE_IRQ, ..) relies on static allocation of IRQ resources in DT core code, this causes an issue when using hierarchical interrupt domains using "interrupts" property in the node as this bypasses the hierarchical setup and messes up the irq chaining. In preparation for removal of static setup of IRQ resource from DT core code use platform_get_irq_optional(). Signed-off-by: Lad Prabhakar --- drivers/tty/serial/altera_uart.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/tty/serial/altera_uart.c b/drivers/tty/serial/altera_uart.c index 7c5f4e966b59..64a352b40197 100644 --- a/drivers/tty/serial/altera_uart.c +++ b/drivers/tty/serial/altera_uart.c @@ -553,7 +553,6 @@ static int altera_uart_probe(struct platform_device *pdev) struct altera_uart_platform_uart *platp = dev_get_platdata(&pdev->dev); struct uart_port *port; struct resource *res_mem; - struct resource *res_irq; int i = pdev->id; int ret; @@ -577,9 +576,11 @@ static int altera_uart_probe(struct platform_device *pdev) else return -EINVAL; - res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); - if (res_irq) - port->irq = res_irq->start; + ret = platform_get_irq_optional(pdev, 0); + if (ret < 0 && ret != -ENXIO) + return ret; + if (ret > 0) + port->irq = ret; else if (platp) port->irq = platp->irq;