From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1946253AbdEYW33 (ORCPT ); Thu, 25 May 2017 18:29:29 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:41456 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1946239AbdEYW30 (ORCPT ); Thu, 25 May 2017 18:29:26 -0400 From: Stefan Berger To: jarkko.sakkinen@linux.intel.com, tpmdd-devel@lists.sourceforge.net Cc: linux-security-module@vger.kernel.org, linux-kernel@vger.kernel.org, jgunthorpe@obsidianresearch.com, Stefan Berger Subject: [PATCH v3] tpm: vtpm_proxy: Suppress error logging when in closed state Date: Thu, 25 May 2017 18:29:13 -0400 X-Mailer: git-send-email 2.5.5 X-TM-AS-GCONF: 00 x-cbid: 17052522-8235-0000-0000-00000B93307B X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00007117; HX=3.00000241; KW=3.00000007; PH=3.00000004; SC=3.00000212; SDB=6.00865576; UDB=6.00429839; IPR=6.00645406; BA=6.00005375; NDR=6.00000001; ZLA=6.00000005; ZF=6.00000009; ZB=6.00000000; ZP=6.00000000; ZH=6.00000000; ZU=6.00000002; MB=3.00015583; XFM=3.00000015; UTC=2017-05-25 22:29:24 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17052522-8236-0000-0000-00003BF9E309 Message-Id: <1495751353-28500-1-git-send-email-stefanb@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2017-05-25_17:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1703280000 definitions=main-1705250408 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Suppress the error logging when the core TPM driver sends commands to the VTPM proxy driver and -EPIPE is returned in case the VTPM proxy driver is 'closed' (closed anonymous file descriptor). This error code is only returned by the send function and by tpm_transmit when the VTPM proxy driver is being used. Signed-off-by: Stefan Berger --- drivers/char/tpm/tpm-interface.c | 5 +++-- drivers/char/tpm/tpm2-cmd.c | 2 +- 2 files changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c index d711186..d2b4df6 100644 --- a/drivers/char/tpm/tpm-interface.c +++ b/drivers/char/tpm/tpm-interface.c @@ -430,8 +430,9 @@ ssize_t tpm_transmit(struct tpm_chip *chip, struct tpm_space *space, rc = chip->ops->send(chip, (u8 *) buf, count); if (rc < 0) { - dev_err(&chip->dev, - "tpm_transmit: tpm_send: error %d\n", rc); + if (rc != -EPIPE) + dev_err(&chip->dev, + "%s: tpm_send: error %d\n", __func__, rc); goto out; } diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c index 3ee6883..3a99643 100644 --- a/drivers/char/tpm/tpm2-cmd.c +++ b/drivers/char/tpm/tpm2-cmd.c @@ -840,7 +840,7 @@ void tpm2_shutdown(struct tpm_chip *chip, u16 shutdown_type) /* 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) + if (rc < 0 && rc != -EPIPE) dev_warn(&chip->dev, "transmit returned %d while stopping the TPM", rc); } -- 2.4.3