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 B8C13C433F5 for ; Tue, 9 Nov 2021 22:33:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A12CE61107 for ; Tue, 9 Nov 2021 22:33:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344785AbhKIWfy (ORCPT ); Tue, 9 Nov 2021 17:35:54 -0500 Received: from mail.kernel.org ([198.145.29.99]:56192 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1345346AbhKIWdv (ORCPT ); Tue, 9 Nov 2021 17:33:51 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id E249761AE4; Tue, 9 Nov 2021 22:21:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1636496516; bh=2xIC4RW/7+34GK6xmB3u03swd/O3KlxuJtrTuGNn2wg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=o9aK8oM0UyNxOxkV6TDj0p53OJy5aXgRd1L/hiqUpjV7SD3tRSRAvz5Bt8byHHKdx wNlnmlYbKYOoBC7Wwvq34yidrFQMopu/yhqQ5NMm36B86bVFlEFExfcw61JflirK5k JBIAmOe1TVF/2Vj2X25kEyv+cwSrVasECG4bIPo+KZt2JxR+am5ukhadEvkEFt5dtE NP0mSi23AsoXCa9h9458vpchonj7/Vir2RGSHGen/5ZbWxFYKpj5ARMLHbCzCiI76w 0vdHCrVmJZRnjk3McVS0Vfl+br4JPmt148DljtS5PzgIIBovcXw3Bdvlyo2firRz/f E99kpLQIhEp3A== 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 5.10 32/50] cpuidle: tegra: Check whether PMC is ready Date: Tue, 9 Nov 2021 17:20:45 -0500 Message-Id: <20211109222103.1234885-32-sashal@kernel.org> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20211109222103.1234885-1-sashal@kernel.org> References: <20211109222103.1234885-1-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: stable@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 29c5e83500d33..e6f96d272d240 100644 --- a/drivers/cpuidle/cpuidle-tegra.c +++ b/drivers/cpuidle/cpuidle-tegra.c @@ -346,6 +346,9 @@ 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