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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 084B0C433FE for ; Tue, 18 Jan 2022 02:48:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242348AbiARCs2 (ORCPT ); Mon, 17 Jan 2022 21:48:28 -0500 Received: from ams.source.kernel.org ([145.40.68.75]:48424 "EHLO ams.source.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1345634AbiARCjO (ORCPT ); Mon, 17 Jan 2022 21:39:14 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 2776AB81259; Tue, 18 Jan 2022 02:39:13 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 05E8FC36AE3; Tue, 18 Jan 2022 02:39:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1642473551; bh=nzPRbG+YEleZyM90F7lOhrrmw0dnK62nvAH2uKUNkoE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WtAG9eRRzAs6njgj9BP65EOVqRupLznx1xtFd276nKhHWZ6L1TO90Orgs27roSSvj fDjcI3DwmdfwnlDSRYg/Zup0WhNSi7NlIn1UuyFGSa9Ts2RZY5CgMz5dTuh4j6Y9mA CvsE4wUQS6ls7EV2uHkjiLTOFHXFdOnwnocbvtQ0m91uhWeirU2kyyQId+e9Q2amzb pKwaOTJ3ks0Fdfu9Ud+ilUx4ZV+rf3UMlDe7v7x+33EvE7GGt51SLPhrq7jrD7bOos xt2ouuDWnWi5I176jJWmkHZxjROT1b0QOG9L0QRMcEr+vnEcrNG0ac58cY/JBo6M79 ugTmDuu4Eyshg== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Mario Limonciello , Jinzhou Su , Huang Rui , "Rafael J . Wysocki" , Sasha Levin , rafael@kernel.org, linux-acpi@vger.kernel.org Subject: [PATCH AUTOSEL 5.15 163/188] ACPI: CPPC: Check present CPUs for determining _CPC is valid Date: Mon, 17 Jan 2022 21:31:27 -0500 Message-Id: <20220118023152.1948105-163-sashal@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220118023152.1948105-1-sashal@kernel.org> References: <20220118023152.1948105-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Mario Limonciello [ Upstream commit 2aeca6bd02776d7f56a49a32be0dd184f204d888 ] As this is a static check, it should be based upon what is currently present on the system. This makes probeing more deterministic. While local APIC flags field (lapic_flags) of cpu core in MADT table is 0, then the cpu core won't be enabled. In this case, _CPC won't be found in this core, and return back to _CPC invalid with walking through possible cpus (include disable cpus). This is not expected, so switch to check present CPUs instead. Reported-by: Jinzhou Su Signed-off-by: Mario Limonciello Signed-off-by: Huang Rui Signed-off-by: Rafael J. Wysocki Signed-off-by: Sasha Levin --- drivers/acpi/cppc_acpi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/acpi/cppc_acpi.c b/drivers/acpi/cppc_acpi.c index 3fbb17ecce2d5..6fe28a2d387bd 100644 --- a/drivers/acpi/cppc_acpi.c +++ b/drivers/acpi/cppc_acpi.c @@ -411,7 +411,7 @@ bool acpi_cpc_valid(void) struct cpc_desc *cpc_ptr; int cpu; - for_each_possible_cpu(cpu) { + for_each_present_cpu(cpu) { cpc_ptr = per_cpu(cpc_desc_ptr, cpu); if (!cpc_ptr) return false; -- 2.34.1