From patchwork Tue Oct 4 13:49:04 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Nuno Sa X-Patchwork-Id: 12998448 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 7205BC433F5 for ; Tue, 4 Oct 2022 13:53:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=B7PYbAHy+gaw6pDvQwX9jOE8yvnNlblDhsqWg+4DlGI=; b=O4A6Q5pQ2EuzL+ 4Yo+JjSEuSXJeFOPNe/TJZzwG2pzmrid9PKKSU2JbPOpsHag5YFOLGW8R8EfxiC54L+CVfUReboTY Z9HqGaJAlIyD378UmlYewMkzxhghiHBVA+vT/Ts8VqfxoL6rr3UmWCyFQz9zqfPSvt7JUTO4omdda 4bVYrzDYyjB9XFIX8NSqHMiv5RPB/o/rPQa7sZp9mtRHIFhIPANx3NVBcSdEsqm7bfalbmQe5A6XD 1ZimGLs2aHeFlCOtPbewqFGJy/2fgyp9aaA5WwcAtMdTBjd853BYLNtvcZFkOErFnl+qA9sqmfb11 9Qbk9bsZkvtmLn19k45w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1ofiLm-009nzH-5R; Tue, 04 Oct 2022 13:52:46 +0000 Received: from mx0a-00128a01.pphosted.com ([148.163.135.77]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1ofiIg-009lzY-R8; Tue, 04 Oct 2022 13:49:36 +0000 Received: from pps.filterd (m0167088.ppops.net [127.0.0.1]) by mx0a-00128a01.pphosted.com (8.17.1.5/8.17.1.5) with ESMTP id 294CKP68005495; Tue, 4 Oct 2022 09:49:21 -0400 Received: from nwd2mta4.analog.com ([137.71.173.58]) by mx0a-00128a01.pphosted.com (PPS) with ESMTPS id 3jxfd73nmx-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 04 Oct 2022 09:49:20 -0400 Received: from ASHBMBX9.ad.analog.com (ASHBMBX9.ad.analog.com [10.64.17.10]) by nwd2mta4.analog.com (8.14.7/8.14.7) with ESMTP id 294DnJgY001565 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 4 Oct 2022 09:49:19 -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; Tue, 4 Oct 2022 09:49:18 -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; Tue, 4 Oct 2022 09:49:18 -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; Tue, 4 Oct 2022 09:49:18 -0400 Received: from nsa.ad.analog.com ([10.44.3.52]) by zeus.spd.analog.com (8.15.1/8.15.1) with ESMTP id 294DlkVi032663; Tue, 4 Oct 2022 09:49:08 -0400 From: =?utf-8?q?Nuno_S=C3=A1?= To: , , , , CC: Heiko Stuebner , Martin Blumenstingl , Neil Armstrong , Shawn Guo , "Lars-Peter Clausen" , Jyoti Bhayana , Hans de Goede , Andriy Tryshnivskyy , Pengutronix Kernel Team , Miquel Raynal , Cixi Geng , Baolin Wang , "Ciprian Regus" , Fabio Estevam , =?utf-8?q?Nuno_S=C3=A1?= , Sascha Hauer , Alexandru Ardelean , "Florian Boor" , Michael Hennerich , Orson Zhai , "Chen-Yu Tsai" , Chunyan Zhang , "Vladimir Zapolskiy" , Andy Shevchenko , "Jerome Brunet" , Haibo Chen , Kevin Hilman , Jonathan Cameron Subject: [PATCH v2 11/16] iio: common: scmi_iio: do not use internal iio_dev lock Date: Tue, 4 Oct 2022 15:49:04 +0200 Message-ID: <20221004134909.1692021-12-nuno.sa@analog.com> X-Mailer: git-send-email 2.37.3 In-Reply-To: <20221004134909.1692021-1-nuno.sa@analog.com> References: <20221004134909.1692021-1-nuno.sa@analog.com> MIME-Version: 1.0 X-ADIRuleOP-NewSCL: Rule Triggered X-Proofpoint-GUID: a49mkOQin8uc_i2QeJ4xH2VSOj9ojrmz X-Proofpoint-ORIG-GUID: a49mkOQin8uc_i2QeJ4xH2VSOj9ojrmz X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.895,Hydra:6.0.528,FMLib:17.11.122.1 definitions=2022-10-04_06,2022-09-29_03,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 impostorscore=0 phishscore=0 suspectscore=0 lowpriorityscore=0 bulkscore=0 priorityscore=1501 mlxscore=0 mlxlogscore=991 clxscore=1015 spamscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2209130000 definitions=main-2210040089 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221004_064934_916956_31C26C16 X-CRM114-Status: GOOD ( 14.31 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The iio_device lock is only meant for internal use. Hence define a device local lock to protect against concurrent accesses. While at it, properly include "mutex.h" for mutex related APIs. Signed-off-by: Nuno Sá --- drivers/iio/common/scmi_sensors/scmi_iio.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/iio/common/scmi_sensors/scmi_iio.c b/drivers/iio/common/scmi_sensors/scmi_iio.c index 54ccf19ab2bb..d92f7f651f7b 100644 --- a/drivers/iio/common/scmi_sensors/scmi_iio.c +++ b/drivers/iio/common/scmi_sensors/scmi_iio.c @@ -15,6 +15,7 @@ #include #include #include +#include #include #include #include @@ -27,6 +28,8 @@ struct scmi_iio_priv { struct scmi_protocol_handle *ph; const struct scmi_sensor_info *sensor_info; struct iio_dev *indio_dev; + /* lock to protect against multiple access to the device */ + struct mutex lock; /* adding one additional channel for timestamp */ s64 iio_buf[SCMI_IIO_NUM_OF_AXIS + 1]; struct notifier_block sensor_update_nb; @@ -198,13 +201,14 @@ static int scmi_iio_write_raw(struct iio_dev *iio_dev, struct iio_chan_spec const *chan, int val, int val2, long mask) { + struct scmi_iio_priv *sensor = iio_priv(iio_dev); int err; switch (mask) { case IIO_CHAN_INFO_SAMP_FREQ: - mutex_lock(&iio_dev->mlock); + mutex_lock(&sensor->lock); err = scmi_iio_set_odr_val(iio_dev, val, val2); - mutex_unlock(&iio_dev->mlock); + mutex_unlock(&sensor->lock); return err; default: return -EINVAL; @@ -586,6 +590,7 @@ scmi_alloc_iiodev(struct scmi_device *sdev, sensor->sensor_info = sensor_info; sensor->sensor_update_nb.notifier_call = scmi_iio_sensor_update_cb; sensor->indio_dev = iiodev; + mutex_init(&sensor->lock); /* adding one additional channel for timestamp */ iiodev->num_channels = sensor_info->num_axis + 1;