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,URIBL_BLOCKED,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 33BDDC10F12 for ; Mon, 15 Apr 2019 19:23:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EB92220651 for ; Mon, 15 Apr 2019 19:23:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1555356184; bh=NVvtnQW6+4IY5A1Rbha4/7epwBJhAGchxQSymarG8d8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=0MIDj/LWT6RD6cdDPFSu1AUYuJ25bmAPzsdUSLOmsnxuWL9zbpzQdlJfJL02qKQJE gqTL1N64eZ/LD8Q+JZJG/VIx5yD/TNyJ2up2CfmqJuaZZdV6cG9y8fcobr81FGm3xv fQ4L1Ti1EOnNhasbGCHJCEPnCRqqwCYcK0IdU3L4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729571AbfDOTHz (ORCPT ); Mon, 15 Apr 2019 15:07:55 -0400 Received: from mail.kernel.org ([198.145.29.99]:42988 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730322AbfDOTHv (ORCPT ); Mon, 15 Apr 2019 15:07:51 -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 ACBAB218FE; Mon, 15 Apr 2019 19:07:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1555355271; bh=NVvtnQW6+4IY5A1Rbha4/7epwBJhAGchxQSymarG8d8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=051yNZl65NIrBlHCYCqoO1KddgvaIe/q9BXnnLOY7AmU1Quo/sZI/FfNZcwiSuIJM fX8LDnH+V09GlHzT8/2tvOAgFZOFfzAJPZEhmQYm6kI96VtwviuADXvY48mOjkzidR 54qP0UeALISF6PAMQGmVGCxuxPTQPwC23y43biac= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Kefeng Wang , Thomas Gleixner , Mukesh Ojha , Marc Zyngier , linux-arm-kernel@lists.infradead.org Subject: [PATCH 4.19 074/101] genirq: Initialize request_mutex if CONFIG_SPARSE_IRQ=n Date: Mon, 15 Apr 2019 20:59:12 +0200 Message-Id: <20190415183744.374157389@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190415183740.341577907@linuxfoundation.org> References: <20190415183740.341577907@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Kefeng Wang commit e8458e7afa855317b14915d7b86ab3caceea7eb6 upstream. When CONFIG_SPARSE_IRQ is disable, the request_mutex in struct irq_desc is not initialized which causes malfunction. Fixes: 9114014cf4e6 ("genirq: Add mutex to irq desc to serialize request/free_irq()") Signed-off-by: Kefeng Wang Signed-off-by: Thomas Gleixner Reviewed-by: Mukesh Ojha Cc: Marc Zyngier Cc: Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/20190404074512.145533-1-wangkefeng.wang@huawei.com Signed-off-by: Greg Kroah-Hartman --- kernel/irq/irqdesc.c | 1 + 1 file changed, 1 insertion(+) --- a/kernel/irq/irqdesc.c +++ b/kernel/irq/irqdesc.c @@ -554,6 +554,7 @@ int __init early_irq_init(void) alloc_masks(&desc[i], node); raw_spin_lock_init(&desc[i].lock); lockdep_set_class(&desc[i].lock, &irq_desc_lock_class); + mutex_init(&desc[i].request_mutex); desc_set_defaults(i, &desc[i], node, NULL, NULL); } return arch_early_irq_init();