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 ED912C43381 for ; Mon, 4 Mar 2019 08:24:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BA14021473 for ; Mon, 4 Mar 2019 08:24:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1551687880; bh=GqrSWFwnblErk301gDd4tZ48+bd5m799+eMLB+1fZ2k=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Cykg2/bdk1xhFECd/Z00fwHTBsn4XrI9wbsu59uWShSA0BDeB+gScONLyoCh5SkJo TM//J3eos6P3ADvNfVfIYFZUanQR6fCjsX6G+EaJmiRdkQg2wrY4cSkks0ciBRXMjn 9oEF03ycmx/CnTcbEe3Kqv9j6O13eEEcnnot3CKA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726897AbfCDIYj (ORCPT ); Mon, 4 Mar 2019 03:24:39 -0500 Received: from mail.kernel.org ([198.145.29.99]:42692 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726860AbfCDIYf (ORCPT ); Mon, 4 Mar 2019 03:24:35 -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 7A57B20823; Mon, 4 Mar 2019 08:24:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1551687875; bh=GqrSWFwnblErk301gDd4tZ48+bd5m799+eMLB+1fZ2k=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=AeJJTHQxJcds9pvgRqulhZ64cW6kl29y4acn1dWw/DOh/x75SqMQMOTtBIbQ5bar3 0tfdHE7lVH3K/9tUCjjalsrNpPKLEYmYBvArAckp8cwT4hT1++HnpsgVFKZy3ldxBZ P01yw+jMGYeJikrbxLfQiI3OrJmGbSIbqBIHvzDw= 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 4.14 16/52] genirq: Make sure the initial affinity is not empty Date: Mon, 4 Mar 2019 09:22:14 +0100 Message-Id: <20190304081618.030955047@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190304081617.159014799@linuxfoundation.org> References: <20190304081617.159014799@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 4.14-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 4cd85870f00e6..6c877d28838f2 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -360,6 +360,9 @@ 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