From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: 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=-6.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,USER_AGENT_GIT autolearn=ham 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 79A95C43381 for ; Mon, 1 Apr 2019 17:49:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 48A2020883 for ; Mon, 1 Apr 2019 17:49:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1554140956; bh=ypDZLm/OD4et0aUlj8/hWV8vPL6MC6k0a2u6dx9Vja0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=v/hm0AntByV5tl+LdzDJc4NxKakxl0mzsf0xT9KYk7st1zuBCzWrNMZmHgn0gAAiK DJX0SaWlYgkcqb4DbfsMkcWYSBY3qdqIw792M0E9xa+qKqftC0SLmLArgpNUP3uY6O nD1bolHWtRSGhxnURWhVqUEpgzPhgBs1SfxTKp/0= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732906AbfDARtP (ORCPT ); Mon, 1 Apr 2019 13:49:15 -0400 Received: from mail.kernel.org ([198.145.29.99]:37036 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1733050AbfDARaN (ORCPT ); Mon, 1 Apr 2019 13:30:13 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id AD96320830; Mon, 1 Apr 2019 17:30:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1554139812; bh=ypDZLm/OD4et0aUlj8/hWV8vPL6MC6k0a2u6dx9Vja0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=R4c2M0XOSyXu/t2OhBjn8qkwvVyM3Jc8vS0YIciaGe36L+J4adft19JcC2ZBXvMxM meHOOCLHPDwY9NAlOS/XZQ3okAWQLnZYMcsBha1Sp76hzuaHiOpy3wkSuA9Uq/NLDq vcx0t2zac21YI4IlNMO9tRHAPT/VteL7id77qT3E= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Yifeng Li , Paul Burton , linux-mips@vger.kernel.org, Jiaxun Yang , Huacai Chen , Ralf Baechle , James Hogan Subject: [PATCH 4.4 004/131] mips: loongson64: lemote-2f: Add IRQF_NO_SUSPEND to "cascade" irqaction. Date: Mon, 1 Apr 2019 19:01:14 +0200 Message-Id: <20190401170052.064881644@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190401170051.645954551@linuxfoundation.org> References: <20190401170051.645954551@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Yifeng Li commit 5f5f67da9781770df0403269bc57d7aae608fecd upstream. Timekeeping IRQs from CS5536 MFGPT are routed to i8259, which then triggers the "cascade" IRQ on MIPS CPU. Without IRQF_NO_SUSPEND in cascade_irqaction, MFGPT interrupts will be masked in suspend mode, and the machine would be unable to resume once suspended. Previously, MIPS IRQs were not disabled properly, so the original code appeared to work. Commit a3e6c1eff5 ("MIPS: IRQ: Fix disable_irq on CPU IRQs") uncovers the bug. To fix it, add IRQF_NO_SUSPEND to cascade_irqaction. This commit is functionally identical to 0add9c2f1cff ("MIPS: Loongson-3: Add IRQF_NO_SUSPEND to Cascade irqaction"), but it forgot to apply the same fix to Loongson2. Signed-off-by: Yifeng Li Signed-off-by: Paul Burton Cc: linux-mips@vger.kernel.org Cc: Jiaxun Yang Cc: Huacai Chen Cc: Ralf Baechle Cc: James Hogan Cc: linux-kernel@vger.kernel.org Cc: stable@vger.kernel.org # v3.19+ Signed-off-by: Greg Kroah-Hartman --- arch/mips/loongson64/lemote-2f/irq.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/mips/loongson64/lemote-2f/irq.c +++ b/arch/mips/loongson64/lemote-2f/irq.c @@ -102,7 +102,7 @@ static struct irqaction ip6_irqaction = static struct irqaction cascade_irqaction = { .handler = no_action, .name = "cascade", - .flags = IRQF_NO_THREAD, + .flags = IRQF_NO_THREAD | IRQF_NO_SUSPEND, }; void __init mach_init_irq(void)