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Tue, 09 Feb 2021 17:12:58 +0000 Received: from b01ledav005.gho.pok.ibm.com (b01ledav005.gho.pok.ibm.com [9.57.199.110]) by b01cxnp22034.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 119HCv7O35914082 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 9 Feb 2021 17:12:57 GMT Received: from b01ledav005.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 6EB6AAE062; Tue, 9 Feb 2021 17:12:57 +0000 (GMT) Received: from b01ledav005.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 4FF3EAE05C; Tue, 9 Feb 2021 17:12:56 +0000 (GMT) Received: from v0005c16.aus.stglabs.ibm.com (unknown [9.163.58.95]) by b01ledav005.gho.pok.ibm.com (Postfix) with ESMTP; Tue, 9 Feb 2021 17:12:56 +0000 (GMT) From: Eddie James To: linux-hwmon@vger.kernel.org Subject: [PATCH 2/4] fsi: occ: Log error for checksum failure Date: Tue, 9 Feb 2021 11:12:33 -0600 Message-Id: <20210209171235.20624-3-eajames@linux.ibm.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20210209171235.20624-1-eajames@linux.ibm.com> References: <20210209171235.20624-1-eajames@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.369, 18.0.737 definitions=2021-02-09_05:2021-02-09, 2021-02-09 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 lowpriorityscore=0 suspectscore=0 priorityscore=1501 impostorscore=0 malwarescore=0 bulkscore=0 phishscore=0 mlxlogscore=999 adultscore=0 clxscore=1015 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2102090083 X-BeenThere: linux-fsi@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: jdelvare@suse.com, alistair@popple.id.au, linux-kernel@vger.kernel.org, linux-fsi@lists.ozlabs.org Errors-To: linux-fsi-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "linux-fsi" Log an error if the response checksum doesn't match the calculated checksum. Signed-off-by: Eddie James Reviewed-by: Joel Stanley --- drivers/fsi/fsi-occ.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/drivers/fsi/fsi-occ.c b/drivers/fsi/fsi-occ.c index cb05b6dacc9d..524460995465 100644 --- a/drivers/fsi/fsi-occ.c +++ b/drivers/fsi/fsi-occ.c @@ -223,7 +223,8 @@ static const struct file_operations occ_fops = { .release = occ_release, }; -static int occ_verify_checksum(struct occ_response *resp, u16 data_length) +static int occ_verify_checksum(struct occ *occ, struct occ_response *resp, + u16 data_length) { /* Fetch the two bytes after the data for the checksum. */ u16 checksum_resp = get_unaligned_be16(&resp->data[data_length]); @@ -238,8 +239,11 @@ static int occ_verify_checksum(struct occ_response *resp, u16 data_length) for (i = 0; i < data_length; ++i) checksum += resp->data[i]; - if (checksum != checksum_resp) + if (checksum != checksum_resp) { + dev_err(occ->dev, "Bad checksum: %04x!=%04x\n", checksum, + checksum_resp); return -EBADMSG; + } return 0; } @@ -533,7 +537,7 @@ int fsi_occ_submit(struct device *dev, const void *request, size_t req_len, } *resp_len = resp_data_length + 7; - rc = occ_verify_checksum(resp, resp_data_length); + rc = occ_verify_checksum(occ, resp, resp_data_length); done: mutex_unlock(&occ->occ_lock);