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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,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 BB68FC432C0 for ; Fri, 22 Nov 2019 06:18:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 867DE2068F for ; Fri, 22 Nov 2019 06:18:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1574403522; bh=+4ZYxgp6JPeEo+Ag+AOKVeFQr15T9Pdm9jbIOQcVegU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Jf0pRCGt211qWmQQFJYhCOW31VvUHYCq4KiLgT7f50SSmYfbF9v8ptZmaL6+s3Ykp lGx42fluzd6GgsUTdYbv5JwRU6rSNi6kmAFk/NGf/4sP2ACSBH5SXWxykOlHN8+JS5 ZINJF4CgMt6MedZvGsilhdNJCp7mYtDaPVmaDagw= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729435AbfKVGSl (ORCPT ); Fri, 22 Nov 2019 01:18:41 -0500 Received: from mail.kernel.org ([198.145.29.99]:50252 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727435AbfKVGNI (ORCPT ); Fri, 22 Nov 2019 01:13:08 -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 99A7B20707; Fri, 22 Nov 2019 06:13:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1574403188; bh=+4ZYxgp6JPeEo+Ag+AOKVeFQr15T9Pdm9jbIOQcVegU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kqm9ei+AsOk7jQqtL4fd0BDACEQnORQ5BFDGCMAB1m/A4yfBrwoxdPyMYYXAyLcqr 0vyiOQ3K25Znz51MYZ/XVuFk8rrxg3nNi3xcNLP6tAXTfEuAu0sGGA8pRYgA7W6nuf 5eSpMylDRxU43Sg1m4fzjUgg3kBnamJLip3ONrcM= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Suzuki K Poulose , Steve Capper , Will Deacon , Suzuki K Poulose , Sasha Levin , linux-arm-kernel@lists.infradead.org Subject: [PATCH AUTOSEL 4.4 06/68] arm64: smp: Handle errors reported by the firmware Date: Fri, 22 Nov 2019 01:11:59 -0500 Message-Id: <20191122061301.4947-5-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191122061301.4947-1-sashal@kernel.org> References: <20191122061301.4947-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review 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: Suzuki K Poulose [ Upstream commit f357b3a7e17af7736d67d8267edc1ed3d1dd9391 ] The __cpu_up() routine ignores the errors reported by the firmware for a CPU bringup operation and looks for the error status set by the booting CPU. If the CPU never entered the kernel, we could end up in assuming stale error status, which otherwise would have been set/cleared appropriately by the booting CPU. Reported-by: Steve Capper Cc: Will Deacon Signed-off-by: Suzuki K Poulose Signed-off-by: Will Deacon Signed-off-by: Sasha Levin --- arch/arm64/kernel/smp.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c index 03c0946b79d20..7e90f429f7e5c 100644 --- a/arch/arm64/kernel/smp.c +++ b/arch/arm64/kernel/smp.c @@ -115,6 +115,7 @@ int __cpu_up(unsigned int cpu, struct task_struct *idle) } } else { pr_err("CPU%u: failed to boot: %d\n", cpu, ret); + return ret; } secondary_data.stack = NULL; -- 2.20.1