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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,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 B1FB7CA9EC4 for ; Tue, 29 Oct 2019 16:44:55 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 8481420874 for ; Tue, 29 Oct 2019 16:44:55 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="VcbnlLw5"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="nGhuDYkf" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8481420874 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linaro.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=w+Bfq53yiTvKgdZAHZ2s/sKjbXTWn4G2vqbRfi7Wj7g=; b=VcbnlLw5xegK+cSai+WhIUGAum Y/ISdAf2EGf7R89GmMxWsTj00lANNJK6Izu+1k/rD2WmMATYMSNfPK3N+p96Emh90/QTzDJJ2aH5m GB4PbBQIARB9pR1AKC8ghzVpLN4XQYW3z6s56eNRvE/fxcW3NYdC3cgVnCXytnevYGX0d9wQAV3PM pb0hM7u6r/FbAxe65GaE4sgv+s1YXAypOZdX8EDShADiBTLjU6Cz5P80xLAYNV0clcOMcWVNHkkvC hJuQ0OE1fjSP6rVBwIXQUpw/ih/qBDS4FFcPAh1qYqhXY7lw55WbWlaa3dG53xrbzIgnoPk96z0jG m4gqYiFg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iPUc2-0002qn-Sm; Tue, 29 Oct 2019 16:44:54 +0000 Received: from mail-lj1-x241.google.com ([2a00:1450:4864:20::241]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1iPUbx-0002oO-6m for linux-arm-kernel@lists.infradead.org; Tue, 29 Oct 2019 16:44:52 +0000 Received: by mail-lj1-x241.google.com with SMTP id y3so16057646ljj.6 for ; Tue, 29 Oct 2019 09:44:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=bWmI0Xiuvq89sgTizuBFylB3C9/WTB7ILCq148rwhZk=; b=nGhuDYkfvkQnrZTY/TN3SJPYAaq6N0hugnaQQTvYzRjyoPirGxoPyytewdnMuFCFij DaKmL0IiI3Qljq5CIImb9zhUYVW5VW+op923nnammGE5rv2FOHsLNPRmSR5VSjEBxWTZ +oyoY/dWhez06dxKGThbrMguGRiBM7sr5gIaMs4iiiLuPwmPqMDG6CWDzEBWGB0x0Ha1 In+/km5T6X+Vcwoxcv0M++rn5YHmiXagng2jm6Cu5K0cpWPMP5hz4j2QblIRc92btI15 4916IppXqRFSp/7tSoPmztteLkZaZyI8t2KNAKLsXA/ULl2xQ7yG8pW90jbbx1HmvIqH BLRA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=bWmI0Xiuvq89sgTizuBFylB3C9/WTB7ILCq148rwhZk=; b=UD41Io3a/Z0gb+IM8jjoNY3/K2GymrB+82+qt4qncIQ4HMH+1N4Kv9W+haDOA19Nal q+4GZvwfh9O/QQFe8rR2Oett+lOCGlE7jxxvdjaM0VQnW0uq/bT46z8FNMClspyPAu3z QSueACKqmkU3hfeZ7MHew9VeGb6wxwg2XmN9QBkg71322i/q8xuGzs50V8g5nDy0m6pk WIpikhrwm8b6lyT2BLSesaoT/Mmtb9SuQ/vBwkUxhawc3qempnfYxjjVrOOH+S3UD6PB cRMKQn9DvVJyVxvANvbA2Mi6WuGK3XGdFpgmM+LwZP3Dg6rV7pDo5mNxf21bCWBO1N4a On6w== X-Gm-Message-State: APjAAAVAPvdKUpffjoHE3EyeFux9D/p1IcDUUm5kX7VWn1UeW4Tszvy5 8O4VDVlSTgnLYidx5W100WJT+w== X-Google-Smtp-Source: APXvYqxiw4yXF19S009oKLq+GuUCc8WXW014siinCqLOYELILmRXWbsHObr2NPT+v/kN830ot6hPPw== X-Received: by 2002:a2e:9a9a:: with SMTP id p26mr3283051lji.164.1572367485207; Tue, 29 Oct 2019 09:44:45 -0700 (PDT) Received: from localhost.localdomain (h-158-174-22-210.NA.cust.bahnhof.se. [158.174.22.210]) by smtp.gmail.com with ESMTPSA id f28sm2048161lfh.35.2019.10.29.09.44.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 29 Oct 2019 09:44:44 -0700 (PDT) From: Ulf Hansson To: "Rafael J . Wysocki" , Daniel Lezcano , Sudeep Holla , Lorenzo Pieralisi , Mark Rutland , Lina Iyer , linux-pm@vger.kernel.org Subject: [PATCH v2 01/13] cpuidle: psci: Align psci_power_state count with idle state count Date: Tue, 29 Oct 2019 17:44:26 +0100 Message-Id: <20191029164438.17012-2-ulf.hansson@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191029164438.17012-1-ulf.hansson@linaro.org> References: <20191029164438.17012-1-ulf.hansson@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191029_094449_250499_0E6E65F6 X-CRM114-Status: GOOD ( 14.39 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Ulf Hansson , Kevin Hilman , Stephen Boyd , linux-arm-msm@vger.kernel.org, Andy Gross , Bjorn Andersson , Rob Herring , linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Sudeep Holla Instead of allocating 'n-1' states in psci_power_state to manage 'n' idle states which include "ARM WFI" state, it would be simpler to have 1:1 mapping between psci_power_state and cpuidle driver states. ARM WFI state(i.e. idx == 0) is handled specially in the generic macro CPU_PM_CPU_IDLE_ENTER_PARAM and hence state[-1] is not possible. However for sake of code readability, it is better to have 1:1 mapping and not use [idx - 1] to access psci_power_state corresponding to driver cpuidle state for idx. psci_power_state[0] is default initialised to 0 and is never accessed while entering WFI state. Reported-by: Ulf Hansson Signed-off-by: Sudeep Holla Reviewed-by: Ulf Hansson --- Changes in v2: - Added tags. --- drivers/cpuidle/cpuidle-psci.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/cpuidle/cpuidle-psci.c b/drivers/cpuidle/cpuidle-psci.c index f3c1a2396f98..361985f52ddd 100644 --- a/drivers/cpuidle/cpuidle-psci.c +++ b/drivers/cpuidle/cpuidle-psci.c @@ -30,7 +30,7 @@ static int psci_enter_idle_state(struct cpuidle_device *dev, u32 *state = __this_cpu_read(psci_power_state); return CPU_PM_CPU_IDLE_ENTER_PARAM(psci_cpu_suspend_enter, - idx, state[idx - 1]); + idx, state[idx]); } static struct cpuidle_driver psci_idle_driver __initdata = { @@ -89,12 +89,14 @@ static int __init psci_dt_cpu_init_idle(struct device_node *cpu_node, int cpu) if (!count) return -ENODEV; + count++; /* Add WFI state too */ psci_states = kcalloc(count, sizeof(*psci_states), GFP_KERNEL); if (!psci_states) return -ENOMEM; - for (i = 0; i < count; i++) { - state_node = of_parse_phandle(cpu_node, "cpu-idle-states", i); + for (i = 1; i < count; i++) { + state_node = of_parse_phandle(cpu_node, "cpu-idle-states", + i - 1); ret = psci_dt_parse_state_node(state_node, &psci_states[i]); of_node_put(state_node); -- 2.17.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel