From patchwork Wed Jan 16 21:23:32 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jarkko Sakkinen X-Patchwork-Id: 10766961 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 318A61580 for ; Wed, 16 Jan 2019 21:24:35 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 242172D968 for ; Wed, 16 Jan 2019 21:24:35 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 17B692EBE2; Wed, 16 Jan 2019 21:24:35 +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 A9EC82EEE0 for ; Wed, 16 Jan 2019 21:24:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729447AbfAPVYe (ORCPT ); Wed, 16 Jan 2019 16:24:34 -0500 Received: from mga04.intel.com ([192.55.52.120]:28166 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729138AbfAPVYe (ORCPT ); Wed, 16 Jan 2019 16:24:34 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga104.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 16 Jan 2019 13:24:33 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.56,487,1539673200"; d="scan'208";a="135247819" Received: from lhaqq1-mobl2.amr.corp.intel.com (HELO localhost) ([10.249.254.231]) by fmsmga002.fm.intel.com with ESMTP; 16 Jan 2019 13:24:29 -0800 From: Jarkko Sakkinen To: linux-integrity@vger.kernel.org Cc: linux-security-module@vger.kernel.org, Peter Huewe , Jason Gunthorpe , Tomas Winkler , Tadeusz Struk , Stefan Berger , Nayna Jain , Jarkko Sakkinen Subject: [PATCH v10 07/17] tpm: encapsulate tpm_dev_transmit() Date: Wed, 16 Jan 2019 23:23:32 +0200 Message-Id: <20190116212342.24524-8-jarkko.sakkinen@linux.intel.com> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20190116212342.24524-1-jarkko.sakkinen@linux.intel.com> References: <20190116212342.24524-1-jarkko.sakkinen@linux.intel.com> MIME-Version: 1.0 Sender: owner-linux-security-module@vger.kernel.org Precedence: bulk List-ID: X-Virus-Scanned: ClamAV using ClamSMTP Encapsulate tpm_transmit() call pattern to tpm_dev_transmit() because it is identically used from two places. Use unlocked version of tpm_transmit() so that we are able to move the calls to tpm2_prepare_space() and tpm2_commit_space() later on to this new function. Signed-off-by: Jarkko Sakkinen Reviewed-by: Stefan Berger Tested-by: Stefan Berger --- drivers/char/tpm/tpm-dev-common.c | 25 ++++++++++++++++++------- 1 file changed, 18 insertions(+), 7 deletions(-) diff --git a/drivers/char/tpm/tpm-dev-common.c b/drivers/char/tpm/tpm-dev-common.c index 5eecad233ea1..759796953d84 100644 --- a/drivers/char/tpm/tpm-dev-common.c +++ b/drivers/char/tpm/tpm-dev-common.c @@ -27,7 +27,19 @@ static struct workqueue_struct *tpm_dev_wq; static DEFINE_MUTEX(tpm_dev_wq_lock); -static void tpm_async_work(struct work_struct *work) +static ssize_t tpm_dev_transmit(struct tpm_chip *chip, struct tpm_space *space, + u8 *buf, size_t bufsiz) +{ + ssize_t ret; + + mutex_lock(&chip->tpm_mutex); + ret = tpm_transmit(chip, space, buf, bufsiz, TPM_TRANSMIT_UNLOCKED); + mutex_unlock(&chip->tpm_mutex); + + return ret; +} + +static void tpm_dev_async_work(struct work_struct *work) { struct file_priv *priv = container_of(work, struct file_priv, async_work); @@ -35,9 +47,8 @@ static void tpm_async_work(struct work_struct *work) mutex_lock(&priv->buffer_mutex); priv->command_enqueued = false; - ret = tpm_transmit(priv->chip, priv->space, priv->data_buffer, - sizeof(priv->data_buffer), 0); - + ret = tpm_dev_transmit(priv->chip, priv->space, priv->data_buffer, + sizeof(priv->data_buffer)); tpm_put_ops(priv->chip); if (ret > 0) { priv->response_length = ret; @@ -80,7 +91,7 @@ void tpm_common_open(struct file *file, struct tpm_chip *chip, mutex_init(&priv->buffer_mutex); timer_setup(&priv->user_read_timer, user_reader_timeout, 0); INIT_WORK(&priv->timeout_work, tpm_timeout_work); - INIT_WORK(&priv->async_work, tpm_async_work); + INIT_WORK(&priv->async_work, tpm_dev_async_work); init_waitqueue_head(&priv->async_wait); file->private_data = priv; } @@ -183,8 +194,8 @@ ssize_t tpm_common_write(struct file *file, const char __user *buf, return size; } - ret = tpm_transmit(priv->chip, priv->space, priv->data_buffer, - sizeof(priv->data_buffer), 0); + ret = tpm_dev_transmit(priv->chip, priv->space, priv->data_buffer, + sizeof(priv->data_buffer)); tpm_put_ops(priv->chip); if (ret > 0) {