From patchwork Fri Jul 15 12:28:50 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Nuno Sa X-Patchwork-Id: 12919178 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 D1B6EC43334 for ; Fri, 15 Jul 2022 12:30:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234052AbiGOM36 (ORCPT ); Fri, 15 Jul 2022 08:29:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45376 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234491AbiGOM3z (ORCPT ); Fri, 15 Jul 2022 08:29:55 -0400 Received: from mx0a-00128a01.pphosted.com (mx0a-00128a01.pphosted.com [148.163.135.77]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3D52B25C76 for ; Fri, 15 Jul 2022 05:29:55 -0700 (PDT) Received: from pps.filterd (m0167089.ppops.net [127.0.0.1]) by mx0a-00128a01.pphosted.com (8.17.1.5/8.17.1.5) with ESMTP id 26FA4PiP026958; Fri, 15 Jul 2022 08:28:57 -0400 Received: from nwd2mta3.analog.com ([137.71.173.56]) by mx0a-00128a01.pphosted.com (PPS) with ESMTPS id 3h9r37te3h-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 15 Jul 2022 08:28:57 -0400 Received: from ASHBMBX9.ad.analog.com (ASHBMBX9.ad.analog.com [10.64.17.10]) by nwd2mta3.analog.com (8.14.7/8.14.7) with ESMTP id 26FCStPK061302 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Fri, 15 Jul 2022 08:28:55 -0400 Received: from ASHBCASHYB5.ad.analog.com (10.64.17.133) by ASHBMBX9.ad.analog.com (10.64.17.10) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.14; Fri, 15 Jul 2022 08:28:55 -0400 Received: from ASHBMBX9.ad.analog.com (10.64.17.10) by ASHBCASHYB5.ad.analog.com (10.64.17.133) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.14; Fri, 15 Jul 2022 08:28:54 -0400 Received: from zeus.spd.analog.com (10.66.68.11) by ashbmbx9.ad.analog.com (10.64.17.10) with Microsoft SMTP Server id 15.2.986.14 via Frontend Transport; Fri, 15 Jul 2022 08:28:54 -0400 Received: from nsa.ad.analog.com ([10.44.3.55]) by zeus.spd.analog.com (8.15.1/8.15.1) with ESMTP id 26FCRxNw001007; Fri, 15 Jul 2022 08:28:44 -0400 From: =?utf-8?q?Nuno_S=C3=A1?= To: , , , , , , , , , Lad Prabhakar , CC: Gwendal Grignou , Jonathan Cameron , Saravanan Sekar , Tomer Maimon , Maxime Coquelin , "Alexandre Torgue" , Lorenzo Bianconi , Fabio Estevam , Shawn Guo , "Olivier Moysan" , Tali Perry , Thara Gopinath , Bjorn Andersson , Arnd Bergmann , Benjamin Fair , Nicolas Ferre , "Rafael J. Wysocki" , Patrick Venture , Pengutronix Kernel Team , Fabrice Gasnier , Daniel Lezcano , Benson Leung , Nancy Yuen , Miquel Raynal , "Alexandre Belloni" , Zhang Rui , Linus Walleij , Christophe Branchereau , Cai Huoqing , Avi Fishman , Eugen Hristev , Matthias Brugger , Sascha Hauer , Lars-Peter Clausen , "Andy Shevchenko" , Guenter Roeck , Paul Cercueil , Claudiu Beznea , Andy Gross , Amit Kucheria , Michael Hennerich , "Haibo Chen" , Jishnu Prakash Subject: [PATCH v3 02/15] iio: inkern: fix return value in devm_of_iio_channel_get_by_name() Date: Fri, 15 Jul 2022 14:28:50 +0200 Message-ID: <20220715122903.332535-3-nuno.sa@analog.com> X-Mailer: git-send-email 2.37.1 In-Reply-To: <20220715122903.332535-1-nuno.sa@analog.com> References: <20220715122903.332535-1-nuno.sa@analog.com> MIME-Version: 1.0 X-ADIRuleOP-NewSCL: Rule Triggered X-Proofpoint-GUID: tNpkAPJ_T9XUWjCHsHWKQHQh-gHhk_zp X-Proofpoint-ORIG-GUID: tNpkAPJ_T9XUWjCHsHWKQHQh-gHhk_zp X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.883,Hydra:6.0.517,FMLib:17.11.122.1 definitions=2022-07-15_04,2022-07-15_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 malwarescore=0 bulkscore=0 clxscore=1015 priorityscore=1501 phishscore=0 spamscore=0 mlxlogscore=999 mlxscore=0 adultscore=0 suspectscore=0 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2206140000 definitions=main-2207150054 Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org of_iio_channel_get_by_name() can either return NULL or an error pointer so that only doing IS_ERR() is not enough. Fix it by checking the NULL pointer case and return -ENODEV in that case. Note this is done like this so that users of the function (which only check for error pointers) do not need to be changed. This is not ideal since we are losing error codes and as such, in a follow up change, things will be unified so that of_iio_channel_get_by_name() only returns error codes. Fixes: 6e39b145cef7 ("iio: provide of_iio_channel_get_by_name() and devm_ version it") Signed-off-by: Nuno Sá Reviewed-by: Andy Shevchenko --- drivers/iio/inkern.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/iio/inkern.c b/drivers/iio/inkern.c index 9d87057794fc..87fd2a0d44f2 100644 --- a/drivers/iio/inkern.c +++ b/drivers/iio/inkern.c @@ -412,6 +412,8 @@ struct iio_channel *devm_of_iio_channel_get_by_name(struct device *dev, channel = of_iio_channel_get_by_name(np, channel_name); if (IS_ERR(channel)) return channel; + if (!channel) + return ERR_PTR(-ENODEV); ret = devm_add_action_or_reset(dev, devm_iio_channel_free, channel); if (ret)