From patchwork Sun Mar 22 18:22:00 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christophe Ricard X-Patchwork-Id: 6067091 Return-Path: X-Original-To: patchwork-tpmdd-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id CFB21BF90F for ; Sun, 22 Mar 2015 18:22:18 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id C1EFF20221 for ; Sun, 22 Mar 2015 18:22:17 +0000 (UTC) Received: from lists.sourceforge.net (lists.sourceforge.net [216.34.181.88]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id C1B2E20220 for ; Sun, 22 Mar 2015 18:22:16 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=sfs-ml-3.v29.ch3.sourceforge.com) by sfs-ml-3.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1YZkVs-0000rk-72; Sun, 22 Mar 2015 18:22:16 +0000 Received: from sog-mx-4.v43.ch3.sourceforge.com ([172.29.43.194] helo=mx.sourceforge.net) by sfs-ml-3.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1YZkVq-0000rd-GV for tpmdd-devel@lists.sourceforge.net; Sun, 22 Mar 2015 18:22:14 +0000 Received-SPF: pass (sog-mx-4.v43.ch3.sourceforge.com: domain of gmail.com designates 74.125.82.172 as permitted sender) client-ip=74.125.82.172; envelope-from=christophe.ricard@gmail.com; helo=mail-we0-f172.google.com; Received: from mail-we0-f172.google.com ([74.125.82.172]) by sog-mx-4.v43.ch3.sourceforge.com with esmtps (TLSv1:RC4-SHA:128) (Exim 4.76) id 1YZkVp-0007Qd-Eo for tpmdd-devel@lists.sourceforge.net; Sun, 22 Mar 2015 18:22:14 +0000 Received: by weop45 with SMTP id p45so121069114weo.0 for ; Sun, 22 Mar 2015 11:22:07 -0700 (PDT) X-Received: by 10.180.189.69 with SMTP id gg5mr12947405wic.93.1427048527420; Sun, 22 Mar 2015 11:22:07 -0700 (PDT) Received: from localhost.localdomain (ax113-6-78-236-204-66.fbx.proxad.net. [78.236.204.66]) by mx.google.com with ESMTPSA id gt4sm7542440wib.21.2015.03.22.11.22.04 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Sun, 22 Mar 2015 11:22:05 -0700 (PDT) From: Christophe Ricard X-Google-Original-From: Christophe Ricard To: peterhuewe@gmx.de Date: Sun, 22 Mar 2015 19:22:00 +0100 Message-Id: <1427048520-18651-2-git-send-email-christophe-h.ricard@st.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1427048520-18651-1-git-send-email-christophe-h.ricard@st.com> References: <1427048520-18651-1-git-send-email-christophe-h.ricard@st.com> X-Spam-Score: -1.6 (-) X-Headers-End: 1YZkVp-0007Qd-Eo Cc: jean-luc.blanc@st.com, ashley@ashleylai.com, christophe.ricard@gmail.com, tpmdd-devel@lists.sourceforge.net, christophe-h.ricard@st.com, benoit.houyere@st.com Subject: [tpmdd-devel] [PATCH v2] tpm/tpm_i2c_stm_st33: Add proper wait for ordinal duration in case of irq mode X-BeenThere: tpmdd-devel@lists.sourceforge.net X-Mailman-Version: 2.1.9 Precedence: list List-Id: Tpm Device Driver maintainance List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: tpmdd-devel-bounces@lists.sourceforge.net X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, FREEMAIL_FROM,HK_RANDOM_ENVFROM,RCVD_IN_DNSWL_HI,T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP In case the driver is configured to use irq, we are not waiting the answer for a duration period to see the DATA_AVAIL status bit to raise but at maximum timeout_c. This may result in critical failure as we will not wait long enough for the command completion. This patch is a backport from kernel 4.1 fix. Signed-off-by: Christophe Ricard --- drivers/char/tpm/tpm_i2c_stm_st33.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/drivers/char/tpm/tpm_i2c_stm_st33.c b/drivers/char/tpm/tpm_i2c_stm_st33.c index 612845b..00362ea 100644 --- a/drivers/char/tpm/tpm_i2c_stm_st33.c +++ b/drivers/char/tpm/tpm_i2c_stm_st33.c @@ -496,7 +496,7 @@ static irqreturn_t tpm_ioserirq_handler(int irq, void *dev_id) static int tpm_stm_i2c_send(struct tpm_chip *chip, unsigned char *buf, size_t len) { - u32 status, i, size; + u32 status, i, size, ordinal; int burstcnt = 0; int ret; u8 data; @@ -559,6 +559,17 @@ static int tpm_stm_i2c_send(struct tpm_chip *chip, unsigned char *buf, data = TPM_STS_GO; I2C_WRITE_DATA(tpm_dev, TPM_STS, &data, 1); + if (chip->vendor.irq) { + ordinal = be32_to_cpu(*((__be32 *) (buf + 6))); + + if (wait_for_stat(chip, TPM_STS_DATA_AVAIL | TPM_STS_VALID, + tpm_calc_ordinal_duration(chip, ordinal), + &chip->vendor.read_queue, true) < 0) { + ret = -ETIME; + goto out_err; + } + } + return len; out_err: tpm_stm_i2c_cancel(chip);