From nobody Fri Jan 2 12:35:24 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8A68FCD6E72 for ; Wed, 11 Oct 2023 13:58:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232549AbjJKN6o (ORCPT ); Wed, 11 Oct 2023 09:58:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42494 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232075AbjJKN6n (ORCPT ); Wed, 11 Oct 2023 09:58:43 -0400 Received: from mx0a-00128a01.pphosted.com (mx0a-00128a01.pphosted.com [148.163.135.77]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 28D5898; Wed, 11 Oct 2023 06:58:42 -0700 (PDT) Received: from pps.filterd (m0167089.ppops.net [127.0.0.1]) by mx0a-00128a01.pphosted.com (8.17.1.22/8.17.1.22) with ESMTP id 39BDV2m7017505; Wed, 11 Oct 2023 09:58:27 -0400 Received: from nwd2mta4.analog.com ([137.71.173.58]) by mx0a-00128a01.pphosted.com (PPS) with ESMTPS id 3tkm6hcgce-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 11 Oct 2023 09:58:27 -0400 (EDT) Received: from ASHBMBX8.ad.analog.com (ASHBMBX8.ad.analog.com [10.64.17.5]) by nwd2mta4.analog.com (8.14.7/8.14.7) with ESMTP id 39BDwQfm049740 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 11 Oct 2023 09:58:26 -0400 Received: from ASHBMBX8.ad.analog.com (10.64.17.5) by ASHBMBX8.ad.analog.com (10.64.17.5) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.14; Wed, 11 Oct 2023 09:58:24 -0400 Received: from zeus.spd.analog.com (10.66.68.11) by ashbmbx8.ad.analog.com (10.64.17.5) with Microsoft SMTP Server id 15.2.986.14 via Frontend Transport; Wed, 11 Oct 2023 09:58:23 -0400 Received: from amiclaus-VirtualBox.ad.analog.com (AMICLAUS-L02.ad.analog.com [10.48.65.194]) by zeus.spd.analog.com (8.15.1/8.15.1) with ESMTP id 39BDwD3b002538; Wed, 11 Oct 2023 09:58:16 -0400 From: Antoniu Miclaus To: Jean Delvare , Guenter Roeck , , CC: Antoniu Miclaus Subject: [PATCH] drivers: hwmon: ltc2992: avoid division by zero Date: Wed, 11 Oct 2023 16:57:53 +0300 Message-ID: <20231011135754.13508-1-antoniu.miclaus@analog.com> X-Mailer: git-send-email 2.42.0 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ADIRuleOP-NewSCL: Rule Triggered X-Proofpoint-GUID: aUtQjHIGG5tBnuRvmH1pCtWksEgqcjb4 X-Proofpoint-ORIG-GUID: aUtQjHIGG5tBnuRvmH1pCtWksEgqcjb4 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.267,Aquarius:18.0.980,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-10-11_09,2023-10-11_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 lowpriorityscore=0 phishscore=0 mlxlogscore=827 mlxscore=0 malwarescore=0 spamscore=0 adultscore=0 clxscore=1015 bulkscore=0 impostorscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2309180000 definitions=main-2310110122 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Do not allow setting shunt resistor to 0. This results in a division by zero when performing current value computations based on input voltages and connected resistor values. Signed-off-by: Antoniu Miclaus --- drivers/hwmon/ltc2992.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/hwmon/ltc2992.c b/drivers/hwmon/ltc2992.c index 589bcd07ce7f..001799bc28ed 100644 --- a/drivers/hwmon/ltc2992.c +++ b/drivers/hwmon/ltc2992.c @@ -875,8 +875,12 @@ static int ltc2992_parse_dt(struct ltc2992_state *st) } =20 ret =3D fwnode_property_read_u32(child, "shunt-resistor-micro-ohms", &va= l); - if (!ret) + if (!ret) { + if (!val) + return dev_err_probe(&st->client->dev, -EINVAL, + "shunt resistor value cannot be zero\n"); st->r_sense_uohm[addr] =3D val; + } } =20 return 0; --=20 2.42.0