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[209.132.180.67]) by mx.google.com with ESMTP id c12-v6si5151671plz.456.2018.09.26.07.25.13; Wed, 26 Sep 2018 07:25:30 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=intel.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728372AbeIZUha (ORCPT + 99 others); Wed, 26 Sep 2018 16:37:30 -0400 Received: from mga05.intel.com ([192.55.52.43]:5724 "EHLO mga05.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726915AbeIZUha (ORCPT ); Wed, 26 Sep 2018 16:37:30 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by fmsmga105.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 26 Sep 2018 07:24:18 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.54,306,1534834800"; d="scan'208";a="266870004" Received: from rbhardw1-mobl.gar.corp.intel.com (HELO [10.252.74.64]) ([10.252.74.64]) by fmsmga006.fm.intel.com with ESMTP; 26 Sep 2018 07:24:14 -0700 Subject: Re: [PATCH 4/4] platform/x86: intel_telemetry: report debugfs failure To: Andy Shevchenko Cc: Platform Driver , Darren Hart , Andy Shevchenko , Linux Kernel Mailing List , Rajneesh Bhardwaj , Souvik Kumar Chakravarty , matt.turner@intel.com, "Brown, Len" , Sathyanarayanan Kuppuswamy References: <20180903180415.31575-1-rajneesh.bhardwaj@linux.intel.com> <20180903180415.31575-4-rajneesh.bhardwaj@linux.intel.com> From: "Bhardwaj, Rajneesh" Message-ID: <69ad420e-362c-d8c9-331f-056cdaefb1eb@linux.intel.com> Date: Wed, 26 Sep 2018 19:54:13 +0530 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 26-Sep-18 7:26 PM, Andy Shevchenko wrote: > On Mon, Sep 3, 2018 at 9:05 PM Rajneesh Bhardwaj > wrote: >> On some Goldmont based systems such as ASRock J3455M the BIOS may not >> enable the IPC1 device that provides access to the PMC and PUNIT. In >> such scenarios, the ioss and pss resources from the platform device can > IOSS > PSS Fine. > >> not be obtained and result in a invalid telemetry_plt_config. > What is telemetry_plt_config? Internal data structure that holds platform config, maintained by the telemetry platform driver. > >> This is also applicable to the platforms where the BIOS supports IPC1 >> device under debug configurations but IPC1 is disabled by user or the >> policy. >> >> This change allows user to know the reason for not seeing entries under >> /sys/kernel/debug/telemetry/* when there is no apparent failure at boot. >> >> Cc: Matt Turner >> Cc: Len Brown >> Cc: Souvik Kumar Chakravarty >> Cc: Kuppuswamy Sathyanarayanan >> >> Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=198779 >> > There should be not a blank line. OK. > >> Acked-by: Matt Turner >> Signed-off-by: Rajneesh Bhardwaj >> +exit: >> + pr_debug(pr_fmt(DRIVER_NAME) " Failed\n"); > Completely useless. > > Device core does it in generic way. If i remove this print then perhaps there is no need of this patch. Reason to print this is that the platform driver / core driver does not show any error. In-fact they are even loaded in module table. OTOH, this debugfs interface fails. This is very confusing to the users if they check the lsmod output so i feel this print might help. >