From patchwork Sat Nov 21 16:14:55 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Nuno Sa X-Patchwork-Id: 11923537 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-11.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C5F47C63697 for ; Sat, 21 Nov 2020 16:16:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7E91A22206 for ; Sat, 21 Nov 2020 16:16:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726580AbgKUQPu (ORCPT ); Sat, 21 Nov 2020 11:15:50 -0500 Received: from mx0a-00128a01.pphosted.com ([148.163.135.77]:26014 "EHLO mx0a-00128a01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725914AbgKUQPu (ORCPT ); Sat, 21 Nov 2020 11:15:50 -0500 Received: from pps.filterd (m0167088.ppops.net [127.0.0.1]) by mx0a-00128a01.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 0ALGAEC5010928; Sat, 21 Nov 2020 11:15:10 -0500 Received: from nwd2mta4.analog.com ([137.71.173.58]) by mx0a-00128a01.pphosted.com with ESMTP id 34y08urk57-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 21 Nov 2020 11:15:10 -0500 Received: from SCSQMBX11.ad.analog.com (SCSQMBX11.ad.analog.com [10.77.17.10]) by nwd2mta4.analog.com (8.14.7/8.14.7) with ESMTP id 0ALGF8IO012648 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=FAIL); Sat, 21 Nov 2020 11:15:08 -0500 Received: from SCSQMBX11.ad.analog.com (10.77.17.10) by SCSQMBX11.ad.analog.com (10.77.17.10) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1779.2; Sat, 21 Nov 2020 08:15:06 -0800 Received: from zeus.spd.analog.com (10.66.68.11) by SCSQMBX11.ad.analog.com (10.77.17.10) with Microsoft SMTP Server id 15.1.1779.2 via Frontend Transport; Sat, 21 Nov 2020 08:15:06 -0800 Received: from NSA-L01.ad.analog.com ([10.32.226.88]) by zeus.spd.analog.com (8.15.1/8.15.1) with ESMTP id 0ALGF2x3028455; Sat, 21 Nov 2020 11:15:03 -0500 From: =?utf-8?q?Nuno_S=C3=A1?= To: , CC: Jonathan Cameron , Lars-Peter Clausen , Peter Meerwald-Stadler , Olivier Moysan , Arnaud Pouliquen , Takashi Iwai , Mark Brown , Jaroslav Kysela , Liam Girdwood Subject: [PATCH 0/2] Make cb a required parameter of buffer-cb Date: Sat, 21 Nov 2020 17:14:55 +0100 Message-ID: <20201121161457.957-1-nuno.sa@analog.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 X-ADIRuleOP-NewSCL: Rule Triggered X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.312,18.0.737 definitions=2020-11-21_04:2020-11-20,2020-11-21 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 lowpriorityscore=0 bulkscore=0 phishscore=0 adultscore=0 mlxlogscore=763 clxscore=1011 priorityscore=1501 impostorscore=0 suspectscore=0 spamscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2011210111 Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org When going through the code of the buffer-cb interface and all it's users, I realized that the stm32_adfsdm driver is calling `iio_channel_get_all_cb()` with NULL for the cb. After going a bit trough the stm drivers, it looks like this is actually intentional. However, it is clear that we have a clear/direct route here for a NULL pointer dereference. This change makes cb a required parameter of the API. The first patch makes the necessary changes to the stm32_adfsdm driver so that it does not break. Nuno Sá (1): iio: buffer: Return error if no callback is given Olivier Moysan (1): ASoC: stm32: dfsdm: add stm32_adfsdm_dummy_cb() callback drivers/iio/buffer/industrialio-buffer-cb.c | 5 +++++ sound/soc/stm/stm32_adfsdm.c | 12 +++++++++++- 2 files changed, 16 insertions(+), 1 deletion(-)