From patchwork Wed Sep 15 08:55:16 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mikko Perttunen X-Patchwork-Id: 512647 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=-16.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, 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 8A110C4321E for ; Wed, 15 Sep 2021 08:55:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7100160FC0 for ; Wed, 15 Sep 2021 08:55:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236985AbhIOI44 (ORCPT ); Wed, 15 Sep 2021 04:56:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39082 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232929AbhIOI4z (ORCPT ); Wed, 15 Sep 2021 04:56:55 -0400 Received: from mail.kapsi.fi (mail.kapsi.fi [IPv6:2001:67c:1be8::25]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 90AC1C061766; Wed, 15 Sep 2021 01:55:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=kapsi.fi; s=20161220; h=Content-Transfer-Encoding:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=Nj98s3EHUx3iqSgi/bRE9TqLMNdwT/CPsJyFopIdi7s=; b=eRhSKVaX/dw5hjme5k8oHXopY6 46Wy+9J78T8H0iB3hHUiAIHDkfgCWrmfL0Dc5q/OZwwxgczw0y/l9YjFvXcU2az8IvzoUSdJTFC1V GWDzz/ShDiWYfr4us5Xs3sDJGGwWnZouUib9D6+EkbbX8xgA/QC+ckOy+oBzDTTbt4FG885Xw22cm U6JKNSp0vN9W19lBSFOJoqmqn746GbXPdCu+421UwXQitdyby96ueJzp+I9Esz7VHzvIm3LR78u76 V2Aw035ozcu6R38Sm8Bqi+eOEEnpH8RjmnzEz0k2cR9F3NSEnBj9CInXt0Sz0Kbm5bhRLa0hQ/Gu8 AhE+TB8A==; Received: from dsl-hkibng22-54f986-236.dhcp.inet.fi ([84.249.134.236] helo=toshino.localdomain) by mail.kapsi.fi with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.89) (envelope-from ) id 1mQQhR-000101-SY; Wed, 15 Sep 2021 11:55:25 +0300 From: Mikko Perttunen To: rafael@kernel.org, viresh.kumar@linaro.org, thierry.reding@gmail.com, jonathanh@nvidia.com, krzysztof.kozlowski@canonical.com, lorenzo.pieralisi@arm.com, robh@kernel.org, kw@linux.com, p.zabel@pengutronix.de, rui.zhang@intel.com, daniel.lezcano@linaro.org, amitk@kernel.org Cc: linux-pm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, Mikko Perttunen Subject: [PATCH 4/5] cpufreq: tegra186/tegra194: Handle errors in BPMP response Date: Wed, 15 Sep 2021 11:55:16 +0300 Message-Id: <20210915085517.1669675-4-mperttunen@nvidia.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210915085517.1669675-1-mperttunen@nvidia.com> References: <20210915085517.1669675-1-mperttunen@nvidia.com> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 84.249.134.236 X-SA-Exim-Mail-From: mperttunen@nvidia.com X-SA-Exim-Scanned: No (on mail.kapsi.fi); SAEximRunCond expanded to false Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org The return value from tegra_bpmp_transfer indicates the success or failure of the IPC transaction with BPMP. If the transaction succeeded, we also need to check the actual command's result code. Add code to do this. While at it, explicitly handle missing CPU clusters, which can occur on floorswept chips. This worked before as well, but possibly only by accident. Signed-off-by: Mikko Perttunen --- drivers/cpufreq/tegra186-cpufreq.c | 4 ++++ drivers/cpufreq/tegra194-cpufreq.c | 8 +++++++- 2 files changed, 11 insertions(+), 1 deletion(-) diff --git a/drivers/cpufreq/tegra186-cpufreq.c b/drivers/cpufreq/tegra186-cpufreq.c index 5d1943e787b0..6c88827f4e62 100644 --- a/drivers/cpufreq/tegra186-cpufreq.c +++ b/drivers/cpufreq/tegra186-cpufreq.c @@ -159,6 +159,10 @@ static struct cpufreq_frequency_table *init_vhint_table( table = ERR_PTR(err); goto free; } + if (msg.rx.ret) { + table = ERR_PTR(-EINVAL); + goto free; + } for (i = data->vfloor; i <= data->vceil; i++) { u16 ndiv = data->ndiv[i]; diff --git a/drivers/cpufreq/tegra194-cpufreq.c b/drivers/cpufreq/tegra194-cpufreq.c index a9620e4489ae..ac381db25dbe 100644 --- a/drivers/cpufreq/tegra194-cpufreq.c +++ b/drivers/cpufreq/tegra194-cpufreq.c @@ -242,7 +242,7 @@ static int tegra194_cpufreq_init(struct cpufreq_policy *policy) smp_call_function_single(policy->cpu, get_cpu_cluster, &cl, true); - if (cl >= data->num_clusters) + if (cl >= data->num_clusters || !data->tables[cl]) return -EINVAL; /* set same policy for all cpus in a cluster */ @@ -310,6 +310,12 @@ init_freq_table(struct platform_device *pdev, struct tegra_bpmp *bpmp, err = tegra_bpmp_transfer(bpmp, &msg); if (err) return ERR_PTR(err); + if (msg.rx.ret == -BPMP_EINVAL) { + /* Cluster not available */ + return NULL; + } + if (msg.rx.ret) + return ERR_PTR(-EINVAL); /* * Make sure frequency table step is a multiple of mdiv to match