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=-5.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_1 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 835CDC3A59F for ; Thu, 29 Aug 2019 14:42:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 63F2C233FF for ; Thu, 29 Aug 2019 14:42:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728698AbfH2Okr (ORCPT ); Thu, 29 Aug 2019 10:40:47 -0400 Received: from mga11.intel.com ([192.55.52.93]:28271 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728671AbfH2Okp (ORCPT ); Thu, 29 Aug 2019 10:40:45 -0400 X-Amp-Result: UNKNOWN X-Amp-Original-Verdict: FILE UNKNOWN X-Amp-File-Uploaded: False Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga102.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 29 Aug 2019 07:40:45 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.64,443,1559545200"; d="scan'208";a="380788306" Received: from friedlmi-mobl1.ger.corp.intel.com (HELO localhost) ([10.252.54.26]) by fmsmga005.fm.intel.com with ESMTP; 29 Aug 2019 07:40:41 -0700 Date: Thu, 29 Aug 2019 17:40:40 +0300 From: Jarkko Sakkinen To: Jerry Snitselaar Cc: linux-integrity@vger.kernel.org, linux-kernel@vger.kernel.org, Peter Huewe , Jason Gunthorpe , Alexey Klimov Subject: Re: [PATCH 2/2 v2] tpm_tis: override durations for STM tpm with firmware 1.2.8.28 Message-ID: <20190829144002.zhuqxnsswgl65pnm@linux.intel.com> References: <20190828004621.29050-1-jsnitsel@redhat.com> <20190828004621.29050-3-jsnitsel@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190828004621.29050-3-jsnitsel@redhat.com> Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo User-Agent: NeoMutt/20180716 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Aug 27, 2019 at 05:46:21PM -0700, Jerry Snitselaar wrote: > There was revealed a bug in the STM TPM chipset used in Dell R415s. > Bug is observed so far only on chipset firmware 1.2.8.28 > (1.2 TPM, device-id 0x0, rev-id 78). After some number of > operations chipset hangs and stays in inconsistent state: > > tpm_tis 00:09: Operation Timed out > tpm_tis 00:09: tpm_transmit: tpm_send: error -5 > > Durations returned by the chip are the same like on other > firmware revisions but apparently with specifically 1.2.8.28 fw > durations should be reset to 2 minutes to enable tpm chip work > properly. No working way of updating firmware was found. > > This patch adds implementation of ->update_durations method > that matches only STM devices with specific firmware version. > > Cc: Peter Huewe > Cc: Jarkko Sakkinen > Cc: Jason Gunthorpe > Signed-off-by: Alexey Klimov > Signed-off-by: Jerry Snitselaar > --- > v2: Make suggested changes from Jarkko > - change struct field name to durations from durs > - formatting cleanups > - turn into void function like update_timeouts and > use chip->duration_adjusted to track whether adjustment occurred. The code repetition looks horrible so I wrote a patch that should help: https://patchwork.kernel.org/patch/11121475/ Read the remar that prepends the diffstat. /Jarkko