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=-8.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=unavailable 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 6460DC43141 for ; Thu, 14 Nov 2019 16:59:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3DFD1206D3 for ; Thu, 14 Nov 2019 16:59:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726869AbfKNQ7d (ORCPT ); Thu, 14 Nov 2019 11:59:33 -0500 Received: from mga02.intel.com ([134.134.136.20]:8587 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726516AbfKNQ7d (ORCPT ); Thu, 14 Nov 2019 11:59:33 -0500 X-Amp-Result: UNKNOWN X-Amp-Original-Verdict: FILE UNKNOWN X-Amp-File-Uploaded: False Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 14 Nov 2019 08:59:31 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.68,304,1569308400"; d="scan'208";a="235745047" Received: from pkamlakx-mobl1.gar.corp.intel.com (HELO localhost) ([10.252.10.73]) by fmsmga002.fm.intel.com with ESMTP; 14 Nov 2019 08:59:28 -0800 Date: Thu, 14 Nov 2019 18:59:27 +0200 From: Jarkko Sakkinen To: Jerry Snitselaar Cc: linux-integrity@vger.kernel.org, Peter Huewe , Jason Gunthorpe , linux-kernel@vger.kernel.org, stable@vger.kernel.org, Christian Bundy Subject: Re: [PATCH v3] tpm_tis: turn on TPM before calling tpm_get_timeouts Message-ID: <20191114165927.GB11107@linux.intel.com> References: <20191111233418.17676-1-jsnitsel@redhat.com> <20191113000243.16611-1-jsnitsel@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20191113000243.16611-1-jsnitsel@redhat.com> Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Nov 12, 2019 at 05:02:43PM -0700, Jerry Snitselaar wrote: > With power gating moved out of the tpm_transmit code we need > to power on the TPM prior to calling tpm_get_timeouts. > > Cc: Jarkko Sakkinen > Cc: Peter Huewe > Cc: Jason Gunthorpe > Cc: linux-kernel@vger.kernel.org > Cc: stable@vger.kernel.org > Fixes: a3fbfae82b4c ("tpm: take TPM chip power gating out of tpm_transmit()") > Reported-by: Christian Bundy > Signed-off-by: Jerry Snitselaar > --- > v3: call tpm_chip_stop in error path > v2: fix stable cc to correct address > > drivers/char/tpm/tpm_tis_core.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c > index 270f43acbb77..806acc666696 100644 > --- a/drivers/char/tpm/tpm_tis_core.c > +++ b/drivers/char/tpm/tpm_tis_core.c > @@ -974,13 +974,14 @@ int tpm_tis_core_init(struct device *dev, struct tpm_tis_data *priv, int irq, > * to make sure it works. May as well use that command to set the > * proper timeouts for the driver. > */ > + tpm_chip_start(chip); > if (tpm_get_timeouts(chip)) { > dev_err(dev, "Could not get TPM timeouts and durations\n"); > rc = -ENODEV; > + tpm_chip_stop(chip); > goto out_err; > } > > - tpm_chip_start(chip); As the commit describes the call is not there for any other reason than pinging the TPM. /Jarkko