From patchwork Wed Feb 28 19:58:15 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jarkko Sakkinen X-Patchwork-Id: 10249543 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 0E08160211 for ; Wed, 28 Feb 2018 20:01:48 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id F14B8288CF for ; Wed, 28 Feb 2018 20:01:47 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E635C28BB1; Wed, 28 Feb 2018 20:01:47 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5FD44288CF for ; Wed, 28 Feb 2018 20:01:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934124AbeB1T6u (ORCPT ); Wed, 28 Feb 2018 14:58:50 -0500 Received: from mga05.intel.com ([192.55.52.43]:62205 "EHLO mga05.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932712AbeB1T6r (ORCPT ); Wed, 28 Feb 2018 14:58:47 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga105.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 28 Feb 2018 11:58:47 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.47,406,1515484800"; d="scan'208";a="20929720" Received: from pericsso-mobl.ger.corp.intel.com (HELO localhost) ([10.249.254.51]) by fmsmga007.fm.intel.com with ESMTP; 28 Feb 2018 11:58:42 -0800 From: Jarkko Sakkinen To: linux-integrity@vger.kernel.org Cc: linux-security-module@vger.kernel.org, keyrings@vger.kernel.org, Jarkko Sakkinen , Peter Huewe , Jason Gunthorpe , Arnd Bergmann , Greg Kroah-Hartman , linux-kernel@vger.kernel.org (open list) Subject: [PATCH 2/5] tpm: migrate tpm2_shutdown() to use struct tpm_buf Date: Wed, 28 Feb 2018 21:58:15 +0200 Message-Id: <20180228195819.22231-3-jarkko.sakkinen@linux.intel.com> X-Mailer: git-send-email 2.15.1 In-Reply-To: <20180228195819.22231-1-jarkko.sakkinen@linux.intel.com> References: <20180228195819.22231-1-jarkko.sakkinen@linux.intel.com> Sender: owner-linux-security-module@vger.kernel.org Precedence: bulk List-ID: X-Virus-Scanned: ClamAV using ClamSMTP In order to make struct tpm_buf the first class object for constructing TPM commands, migrate tpm2_shutdown() to use it. In addition, removed the klog entry when tpm_transmit_cmd() fails because tpm_tansmit_cmd() already prints an error message. Signed-off-by: Jarkko Sakkinen --- drivers/char/tpm/tpm2-cmd.c | 41 +++++++++++++---------------------------- 1 file changed, 13 insertions(+), 28 deletions(-) diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c index 6eeff3a60003..5f92141b1e16 100644 --- a/drivers/char/tpm/tpm2-cmd.c +++ b/drivers/char/tpm/tpm2-cmd.c @@ -27,10 +27,6 @@ enum tpm2_session_attributes { TPM2_SA_CONTINUE_SESSION = BIT(0), }; -struct tpm2_startup_in { - __be16 startup_type; -} __packed; - struct tpm2_get_tpm_pt_in { __be32 cap_id; __be32 property_id; @@ -55,7 +51,6 @@ struct tpm2_get_random_out { } __packed; union tpm2_cmd_params { - struct tpm2_startup_in startup_in; struct tpm2_get_tpm_pt_in get_tpm_pt_in; struct tpm2_get_tpm_pt_out get_tpm_pt_out; struct tpm2_get_random_in getrandom_in; @@ -760,40 +755,30 @@ ssize_t tpm2_get_tpm_pt(struct tpm_chip *chip, u32 property_id, u32 *value, } EXPORT_SYMBOL_GPL(tpm2_get_tpm_pt); -#define TPM2_SHUTDOWN_IN_SIZE \ - (sizeof(struct tpm_input_header) + \ - sizeof(struct tpm2_startup_in)) - -static const struct tpm_input_header tpm2_shutdown_header = { - .tag = cpu_to_be16(TPM2_ST_NO_SESSIONS), - .length = cpu_to_be32(TPM2_SHUTDOWN_IN_SIZE), - .ordinal = cpu_to_be32(TPM2_CC_SHUTDOWN) -}; - /** * tpm2_shutdown() - send shutdown command to the TPM chip * + * In places where shutdown command is sent there's no much we can do except + * print the error code on a system failure. + * * @chip: TPM chip to use. * @shutdown_type: shutdown type. The value is either * TPM_SU_CLEAR or TPM_SU_STATE. */ void tpm2_shutdown(struct tpm_chip *chip, u16 shutdown_type) { - struct tpm2_cmd cmd; + struct tpm_buf buf; int rc; - cmd.header.in = tpm2_shutdown_header; - cmd.params.startup_in.startup_type = cpu_to_be16(shutdown_type); - - rc = tpm_transmit_cmd(chip, NULL, &cmd, sizeof(cmd), 0, 0, - "stopping the TPM"); - - /* In places where shutdown command is sent there's no much we can do - * except print the error code on a system failure. - */ - if (rc < 0 && rc != -EPIPE) - dev_warn(&chip->dev, "transmit returned %d while stopping the TPM", - rc); + rc = tpm_buf_init(&buf, TPM2_ST_NO_SESSIONS, TPM2_CC_SHUTDOWN); + if (rc) { + dev_err(&chip->dev, "%s: out of memory", __func__); + return; + } + tpm_buf_append_u16(&buf, shutdown_type); + tpm_transmit_cmd(chip, NULL, buf.data, PAGE_SIZE, 0, 0, + "stopping the TPM"); + tpm_buf_destroy(&buf); } /*