From patchwork Tue Sep 14 15:10:28 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: amirmizi6@gmail.com X-Patchwork-Id: 512448 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=-13.7 required=3.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT 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 5B9A4C433FE for ; Tue, 14 Sep 2021 15:13:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 470FB610F9 for ; Tue, 14 Sep 2021 15:13:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234420AbhINPOr (ORCPT ); Tue, 14 Sep 2021 11:14:47 -0400 Received: from 212.199.177.27.static.012.net.il ([212.199.177.27]:43281 "EHLO herzl.nuvoton.co.il" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S234156AbhINPOk (ORCPT ); Tue, 14 Sep 2021 11:14:40 -0400 Received: from taln60.nuvoton.co.il (ntil-fw [212.199.177.25]) by herzl.nuvoton.co.il (8.13.8/8.13.8) with ESMTP id 18EFAkNA031444; Tue, 14 Sep 2021 18:10:46 +0300 Received: by taln60.nuvoton.co.il (Postfix, from userid 10140) id F34B363A1D; Tue, 14 Sep 2021 18:10:56 +0300 (IDT) From: amirmizi6@gmail.com To: Eyal.Cohen@nuvoton.com, jarkko@kernel.org, oshrialkoby85@gmail.com, alexander.steffen@infineon.com, robh+dt@kernel.org, mark.rutland@arm.com, peterhuewe@gmx.de, jgg@ziepe.ca, arnd@arndb.de, gregkh@linuxfoundation.org, benoit.houyere@st.com, eajames@linux.ibm.com, joel@jms.id.au Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-integrity@vger.kernel.org, oshri.alkoby@nuvoton.com, tmaimon77@gmail.com, gcwilson@us.ibm.com, kgoldman@us.ibm.com, Dan.Morav@nuvoton.com, oren.tanami@nuvoton.com, shmulik.hager@nuvoton.com, amir.mizinski@nuvoton.com, Amir Mizinski Subject: [PATCH v15 2/6] tpm: tpm_tis: Rewrite "tpm_tis_req_canceled()" Date: Tue, 14 Sep 2021 18:10:28 +0300 Message-Id: <20210914151032.216122-3-amirmizi6@gmail.com> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20210914151032.216122-1-amirmizi6@gmail.com> References: <20210914151032.216122-1-amirmizi6@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org From: Amir Mizinski tpm_tis_req_canceled() function is used to check if the caller requested to abort the current operation. It was found that in some cases tpm_tis_req_canceled() wrongly returned true. Since a cancel request sets the TPM_STS.commandReady field to TRUE, the tpm_tis_req_canceled() function should check only the TPM_STS.commandReady field value. The case for TPM_VID_WINBOND is wrong and was therefore removed. Also, the default comparison is wrong. Only cmdReady bit needs to be compared instead of the full lower status register byte. Fixes: 1f866057291f (tpm: Fix cancellation of TPM commands (polling mode)) Signed-off-by: Amir Mizinski --- drivers/char/tpm/tpm_tis_core.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c index 7d5854b..7ea7f64 100644 --- a/drivers/char/tpm/tpm_tis_core.c +++ b/drivers/char/tpm/tpm_tis_core.c @@ -650,13 +650,11 @@ static bool tpm_tis_req_canceled(struct tpm_chip *chip, u8 status) struct tpm_tis_data *priv = dev_get_drvdata(&chip->dev); switch (priv->manufacturer_id) { - case TPM_VID_WINBOND: - return ((status == TPM_STS_VALID) || - (status == (TPM_STS_VALID | TPM_STS_COMMAND_READY))); case TPM_VID_STM: return (status == (TPM_STS_VALID | TPM_STS_COMMAND_READY)); default: - return (status == TPM_STS_COMMAND_READY); + return ((status & TPM_STS_COMMAND_READY) == + TPM_STS_COMMAND_READY); } }