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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E0C61C433F5 for ; Tue, 9 Nov 2021 22:27:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C85B461057 for ; Tue, 9 Nov 2021 22:27:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344745AbhKIWam (ORCPT ); Tue, 9 Nov 2021 17:30:42 -0500 Received: from mail.kernel.org ([198.145.29.99]:50870 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344751AbhKIW2a (ORCPT ); Tue, 9 Nov 2021 17:28:30 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 9051861A7C; Tue, 9 Nov 2021 22:20:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1636496422; bh=3rmI0HOjS667eg5AE/qvuawOwCyc1f9XfLR7kyTPiEk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=VJ+2fPHETVS35FCOYS3FiRp2pqNsd0t8M3payKNDA/2NiBR9waiLoZk53kzHntehI bgwRj8ER/xo7o1nW+Mp/5lmuhZ8B1dnxT35MBQJSjMyh4DnxIxwvS+7SGlbDjJDiBh njsAToEMjSiDWjesLuZSBTSmla+hdABprkKSdllcPkCaArjpcFJ0RFt/tn4G2iYr6o qrcxA7IGkl7ozhRJkyzMGztNZTT5Gme+wiF8iHMkH967ZygZgM/IcGhYtwS0jaE/aZ yNeh13YicDhClXFoFsWVzLI7d0gzSsFmt2SX3ToFN+N96iGo+EJZSW4YRFJ9o0Kkzv bCf5Dz73IFYUw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Dmitry Osipenko , Daniel Lezcano , Thierry Reding , Sasha Levin , rjw@rjwysocki.net, swarren@wwwdotorg.org, thierry.reding@gmail.com, gnurou@gmail.com, linux-pm@vger.kernel.org, linux-tegra@vger.kernel.org Subject: [PATCH AUTOSEL 5.14 47/75] cpuidle: tegra: Check whether PMC is ready Date: Tue, 9 Nov 2021 17:18:37 -0500 Message-Id: <20211109221905.1234094-47-sashal@kernel.org> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20211109221905.1234094-1-sashal@kernel.org> References: <20211109221905.1234094-1-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: Dmitry Osipenko [ Upstream commit bdb1ffdad3b73e4d0538098fc02e2ea87a6b27cd ] Check whether PMC is ready before proceeding with the cpuidle registration. This fixes racing with the PMC driver probe order, which results in a disabled deepest CC6 idling state if cpuidle driver is probed before the PMC. Acked-by: Daniel Lezcano Signed-off-by: Dmitry Osipenko Signed-off-by: Thierry Reding Signed-off-by: Sasha Levin --- drivers/cpuidle/cpuidle-tegra.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/cpuidle/cpuidle-tegra.c b/drivers/cpuidle/cpuidle-tegra.c index 508bd9f237929..9845629aeb6d4 100644 --- a/drivers/cpuidle/cpuidle-tegra.c +++ b/drivers/cpuidle/cpuidle-tegra.c @@ -337,6 +337,9 @@ static void tegra_cpuidle_setup_tegra114_c7_state(void) static int tegra_cpuidle_probe(struct platform_device *pdev) { + if (tegra_pmc_get_suspend_mode() == TEGRA_SUSPEND_NOT_READY) + return -EPROBE_DEFER; + /* LP2 could be disabled in device-tree */ if (tegra_pmc_get_suspend_mode() < TEGRA_SUSPEND_LP2) tegra_cpuidle_disable_state(TEGRA_CC6); -- 2.33.0