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=-9.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,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 2773EC43381 for ; Fri, 15 Feb 2019 02:34:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EBEE5206B6 for ; Fri, 15 Feb 2019 02:34:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1550198058; bh=FnN2b7tTqbakzSmyWd5wQwV4ibN1ySbrBIAZcvY/YHo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=ncfQWVWxrqlALa4FcgLhRJy0rbSttLqVp+QrteyS+BIqOOswIq5nL2jK2QGKcXS/C HeIwopS2bwtNmNt8KUaRvdfh7OjQDkQYsDtq7sQ/7m6nb78Ahx72ilD/JOH9LuTRzm c2vTN5N1cqFUG6sRVJUuSpIL6ylbUfCdD/RWlV5w= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388665AbfBOCeJ (ORCPT ); Thu, 14 Feb 2019 21:34:09 -0500 Received: from mail.kernel.org ([198.145.29.99]:51760 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2404004AbfBOCLp (ORCPT ); Thu, 14 Feb 2019 21:11:45 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id E860221934; Fri, 15 Feb 2019 02:11:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1550196704; bh=FnN2b7tTqbakzSmyWd5wQwV4ibN1ySbrBIAZcvY/YHo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=jHmmsMOPGvDtarx1FqwpJ16EYCkbN65otqj9SJiIVdcw2BvC99ZJCFcaUd+zmL4iH OZi42K8sHo1yXg1gzFsEmkIAAr+IoZz3Dr3n3bezsAu6ADkCOodWO85gBaxJ7GKtg+ PZqtFnJzHUxNydAMnNR4ow20e3DKZZgtmEhq4I74= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Srinivas Ramana , Thomas Gleixner , linux-arm-msm@vger.kernel.org, Sasha Levin Subject: [PATCH AUTOSEL 4.19 14/65] genirq: Make sure the initial affinity is not empty Date: Thu, 14 Feb 2019 21:10:30 -0500 Message-Id: <20190215021121.177674-14-sashal@kernel.org> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20190215021121.177674-1-sashal@kernel.org> References: <20190215021121.177674-1-sashal@kernel.org> MIME-Version: 1.0 X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Srinivas Ramana [ 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 9dbdccab3b6a..5c0ba5ca5930 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