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=-9.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,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 63954C43381 for ; Mon, 4 Mar 2019 08:29:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 329F82146E for ; Mon, 4 Mar 2019 08:29:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1551688199; bh=FXC6vJMqClbFP+FBQGeK1pUCoaRWAOc2bv7l9754gEY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=CO7+GCrPae8d+QtXlg8HgiWibO/5Qr2NlwyliliDKNjYiVx9U3dDQ+3Jtzvqx3tdM 4PmuCMsvXqhCoHoC1CMRPUr12A1dLqDEVgrYcwUZ2dmzGShp1cDOYwxw/n/IYAqOlh GGhFTWHqVb64tdZhQWgL5PAP+aRInZfZS0xs3JYg= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727637AbfCDI35 (ORCPT ); Mon, 4 Mar 2019 03:29:57 -0500 Received: from mail.kernel.org ([198.145.29.99]:57194 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727627AbfCDI3x (ORCPT ); Mon, 4 Mar 2019 03:29:53 -0500 Received: from localhost (5356596B.cm-6-7b.dynamic.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 496E321019; Mon, 4 Mar 2019 08:29:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1551688192; bh=FXC6vJMqClbFP+FBQGeK1pUCoaRWAOc2bv7l9754gEY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=yHFKIk/GnF8x5cP8VbfOiaQlGYuC4Bv10cuRqiiMmGk1g+bUV/GISEkWPueSdWEQ0 wj5QNBX7TpdoIolUR+rFziAv+FXDAxTbQjbutFNXxLyGG/Ie/CpRvyPw/nPVuEBH8n Gj8B5xUxgLlP5ErdRR3YWaEEVkq1XjyGO502jXtc= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Srinivas Ramana , Thomas Gleixner , linux-arm-msm@vger.kernel.org, Sasha Levin Subject: [PATCH 4.19 19/78] genirq: Make sure the initial affinity is not empty Date: Mon, 4 Mar 2019 09:22:02 +0100 Message-Id: <20190304081626.361772533@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190304081625.508788074@linuxfoundation.org> References: <20190304081625.508788074@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 4.19-stable review patch. If anyone has any objections, please let me know. ------------------ [ Upstream commit bddda606ec76550dd63592e32a6e87e7d32583f7 ] If all CPUs in the irq_default_affinity mask are offline when an interrupt is initialized then irq_setup_affinity() can set an empty affinity mask for a newly allocated interrupt. Fix this by falling back to cpu_online_mask in case the resulting affinity mask is zero. Signed-off-by: Srinivas Ramana Signed-off-by: Thomas Gleixner Cc: linux-arm-msm@vger.kernel.org Link: https://lkml.kernel.org/r/1545312957-8504-1-git-send-email-sramana@codeaurora.org Signed-off-by: Sasha Levin --- kernel/irq/manage.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index 9dbdccab3b6a3..5c0ba5ca59308 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -393,6 +393,9 @@ int irq_setup_affinity(struct irq_desc *desc) } cpumask_and(&mask, cpu_online_mask, set); + if (cpumask_empty(&mask)) + cpumask_copy(&mask, cpu_online_mask); + if (node != NUMA_NO_NODE) { const struct cpumask *nodemask = cpumask_of_node(node); -- 2.19.1