From patchwork Wed Jan 30 22:43:32 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jerry Snitselaar X-Patchwork-Id: 10789351 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 1EA69746 for ; Wed, 30 Jan 2019 23:02:00 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 36AE22F977 for ; Wed, 30 Jan 2019 23:02:00 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 2ACCC2F985; Wed, 30 Jan 2019 23:02:00 +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=ham 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 BA5E32F977 for ; Wed, 30 Jan 2019 23:01:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730113AbfA3XBq (ORCPT ); Wed, 30 Jan 2019 18:01:46 -0500 Received: from mx1.redhat.com ([209.132.183.28]:37504 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728081AbfA3XBm (ORCPT ); Wed, 30 Jan 2019 18:01:42 -0500 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id CE6AFC0495BB; Wed, 30 Jan 2019 22:43:45 +0000 (UTC) Received: from cantor.redhat.com (ovpn-116-165.phx2.redhat.com [10.3.116.165]) by smtp.corp.redhat.com (Postfix) with ESMTP id 658DA6266C; Wed, 30 Jan 2019 22:43:45 +0000 (UTC) From: Jerry Snitselaar To: linux-integrity@vger.kernel.org Cc: linux-kernel@vger.kernel.org, linux-security-module@vger.kernel.org, Jarkko Sakkinen Subject: [PATCH 1/2] tpm: don't return bool from update_timeouts Date: Wed, 30 Jan 2019 15:43:32 -0700 Message-Id: <20190130224333.20373-1-jsnitsel@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.31]); Wed, 30 Jan 2019 22:43:45 +0000 (UTC) Sender: owner-linux-security-module@vger.kernel.org Precedence: bulk List-ID: X-Virus-Scanned: ClamAV using ClamSMTP Set tpm_chip->timeouts_adjusted directly in the update_timeouts code instead of returning bool. In case of tpm read failing print warning that the read failed and continue on. Reviewed-by: Jarkko Sakkinen Signed-off-by: Jerry Snitselaar --- drivers/char/tpm/tpm1-cmd.c | 3 +-- drivers/char/tpm/tpm_tis_core.c | 15 +++++++++------ include/linux/tpm.h | 2 +- 3 files changed, 11 insertions(+), 9 deletions(-) diff --git a/drivers/char/tpm/tpm1-cmd.c b/drivers/char/tpm/tpm1-cmd.c index 6f306338953b..bda9a16b44f6 100644 --- a/drivers/char/tpm/tpm1-cmd.c +++ b/drivers/char/tpm/tpm1-cmd.c @@ -380,8 +380,7 @@ int tpm1_get_timeouts(struct tpm_chip *chip) * of misreporting. */ if (chip->ops->update_timeouts) - chip->timeout_adjusted = - chip->ops->update_timeouts(chip, timeout_eff); + chip->ops->update_timeouts(chip, timeout_eff); if (!chip->timeout_adjusted) { /* Restore default if chip reported 0 */ diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c index bf7e49cfa643..45e29fd1f5d7 100644 --- a/drivers/char/tpm/tpm_tis_core.c +++ b/drivers/char/tpm/tpm_tis_core.c @@ -521,35 +521,38 @@ static const struct tis_vendor_timeout_override vendor_timeout_overrides[] = { (TIS_SHORT_TIMEOUT*1000), (TIS_SHORT_TIMEOUT*1000) } }, }; -static bool tpm_tis_update_timeouts(struct tpm_chip *chip, +static void tpm_tis_update_timeouts(struct tpm_chip *chip, unsigned long *timeout_cap) { struct tpm_tis_data *priv = dev_get_drvdata(&chip->dev); int i, rc; u32 did_vid; + chip->timeout_adjusted = false; + if (chip->ops->clk_enable != NULL) chip->ops->clk_enable(chip, true); rc = tpm_tis_read32(priv, TPM_DID_VID(0), &did_vid); - if (rc < 0) + if (rc < 0) { + dev_warn(&chip->dev, "%s: failed to read did_vid: %d\n", + __func__, rc); goto out; + } for (i = 0; i != ARRAY_SIZE(vendor_timeout_overrides); i++) { if (vendor_timeout_overrides[i].did_vid != did_vid) continue; memcpy(timeout_cap, vendor_timeout_overrides[i].timeout_us, sizeof(vendor_timeout_overrides[i].timeout_us)); - rc = true; + chip->timeout_adjusted = true; } - rc = false; - out: if (chip->ops->clk_enable != NULL) chip->ops->clk_enable(chip, false); - return rc; + return; } /* diff --git a/include/linux/tpm.h b/include/linux/tpm.h index b49a55cf775f..13563b8c0c3a 100644 --- a/include/linux/tpm.h +++ b/include/linux/tpm.h @@ -41,7 +41,7 @@ struct tpm_class_ops { int (*send) (struct tpm_chip *chip, u8 *buf, size_t len); void (*cancel) (struct tpm_chip *chip); u8 (*status) (struct tpm_chip *chip); - bool (*update_timeouts)(struct tpm_chip *chip, + void (*update_timeouts)(struct tpm_chip *chip, unsigned long *timeout_cap); int (*go_idle)(struct tpm_chip *chip); int (*cmd_ready)(struct tpm_chip *chip);