From patchwork Tue Sep 20 11:28:18 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Nuno Sa X-Patchwork-Id: 12981989 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 79D64C54EE9 for ; Tue, 20 Sep 2022 11:35:43 +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=1Nl0EUNyzX8BqXFs8EV364IT//0TUl4ljzyfrQqmBvI=; b=QuqAjPsBnNnNEV Gsropv+zlyX9S4zbtuM5TA6ZGBlzjfRjCH/3nLRJat7Do7jiq9TfXaPNgdsJSxxbU8Pn4UVVxe236 D5YvdAxdgIW8sbAJcgIamdQQu5buiRtrOwm+fVpgD3JHCwMmylw9hjXmIKC3L5HeEIaLJsx8hWUrA XefwcBP7WXTuIBHmUrhDZr+YGmvCxZEFf1pd5hoM+JOnPfIPaMgAV4zl6SMVM2ysObd317Sak3th7 SvqwbSqH7KvwrmS3KHEXWoOekXl2QbGVBEriDLLUUIh1JDu4dMt7Kbwztw0aTzuXdgI7dDLAlnJ9f CZCQRh9lqkDIDoJbpdMQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oabXE-003Myi-RZ; Tue, 20 Sep 2022 11:35:28 +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 1oabQr-003IZl-Ft; Tue, 20 Sep 2022 11:28:54 +0000 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 28K81m5G025096; Tue, 20 Sep 2022 07:28:39 -0400 Received: from nwd2mta3.analog.com ([137.71.173.56]) by mx0a-00128a01.pphosted.com (PPS) with ESMTPS id 3jpn468r4h-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 20 Sep 2022 07:28:39 -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 28KBScUJ062625 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 20 Sep 2022 07:28:38 -0400 Received: from ASHBCASHYB4.ad.analog.com (10.64.17.132) 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, 20 Sep 2022 07:28:37 -0400 Received: from ASHBMBX9.ad.analog.com (10.64.17.10) by ASHBCASHYB4.ad.analog.com (10.64.17.132) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.14; Tue, 20 Sep 2022 07:28:36 -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, 20 Sep 2022 07:28:36 -0400 Received: from nsa.ad.analog.com ([10.44.3.57]) by zeus.spd.analog.com (8.15.1/8.15.1) with ESMTP id 28KBR4UY021723; Tue, 20 Sep 2022 07:28:29 -0400 From: =?utf-8?q?Nuno_S=C3=A1?= To: , , , , CC: Chunyan Zhang , Michael Hennerich , Martin Blumenstingl , Sascha Hauer , Cixi Geng , Kevin Hilman , Vladimir Zapolskiy , Pengutronix Kernel Team , Alexandru Ardelean , "Fabio Estevam" , Andriy Tryshnivskyy , Haibo Chen , "Shawn Guo" , Hans de Goede , Miquel Raynal , Jerome Brunet , "Heiko Stuebner" , Florian Boor , Ciprian Regus , Lars-Peter Clausen , Andy Shevchenko , "Jonathan Cameron" , Neil Armstrong , "Baolin Wang" , Jyoti Bhayana , =?utf-8?q?Nuno_S=C3=A1?= , Chen-Yu Tsai , Orson Zhai Subject: [PATCH 12/15] iio: fyro: itg3200_core: do not use internal iio_dev lock Date: Tue, 20 Sep 2022 13:28:18 +0200 Message-ID: <20220920112821.975359-13-nuno.sa@analog.com> X-Mailer: git-send-email 2.37.3 In-Reply-To: <20220920112821.975359-1-nuno.sa@analog.com> References: <20220920112821.975359-1-nuno.sa@analog.com> MIME-Version: 1.0 X-ADIRuleOP-NewSCL: Rule Triggered X-Proofpoint-ORIG-GUID: bP0zvKO0a6s5ksKS6arYuRpCcExLgKHA X-Proofpoint-GUID: bP0zvKO0a6s5ksKS6arYuRpCcExLgKHA 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=2022-09-20_02,2022-09-16_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 bulkscore=0 phishscore=0 clxscore=1015 spamscore=0 priorityscore=1501 lowpriorityscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 malwarescore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2209130000 definitions=main-2209200068 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220920_042853_572997_DF607817 X-CRM114-Status: GOOD ( 15.71 ) X-BeenThere: linux-amlogic@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-amlogic" Errors-To: linux-amlogic-bounces+linux-amlogic=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. Signed-off-by: Nuno Sá --- drivers/iio/gyro/itg3200_core.c | 9 ++++++--- include/linux/iio/gyro/itg3200.h | 2 ++ 2 files changed, 8 insertions(+), 3 deletions(-) diff --git a/drivers/iio/gyro/itg3200_core.c b/drivers/iio/gyro/itg3200_core.c index 0491c64e1b32..358aa8ac0c6b 100644 --- a/drivers/iio/gyro/itg3200_core.c +++ b/drivers/iio/gyro/itg3200_core.c @@ -18,6 +18,7 @@ #include #include #include +#include #include #include @@ -131,6 +132,7 @@ static int itg3200_write_raw(struct iio_dev *indio_dev, int val2, long mask) { + struct itg3200 *st = iio_priv(indio_dev); int ret; u8 t; @@ -139,11 +141,11 @@ static int itg3200_write_raw(struct iio_dev *indio_dev, if (val == 0 || val2 != 0) return -EINVAL; - mutex_lock(&indio_dev->mlock); + mutex_lock(&st->lock); ret = itg3200_read_reg_8(indio_dev, ITG3200_REG_DLPF, &t); if (ret) { - mutex_unlock(&indio_dev->mlock); + mutex_unlock(&st->lock); return ret; } t = ((t & ITG3200_DLPF_CFG_MASK) ? 1000u : 8000u) / val - 1; @@ -152,7 +154,7 @@ static int itg3200_write_raw(struct iio_dev *indio_dev, ITG3200_REG_SAMPLE_RATE_DIV, t); - mutex_unlock(&indio_dev->mlock); + mutex_unlock(&st->lock); return ret; default: @@ -307,6 +309,7 @@ static int itg3200_probe(struct i2c_client *client, return -ENOMEM; st = iio_priv(indio_dev); + mutex_init(&st->lock); ret = iio_read_mount_matrix(&client->dev, &st->orientation); if (ret) diff --git a/include/linux/iio/gyro/itg3200.h b/include/linux/iio/gyro/itg3200.h index a602fe7b84fa..74b6d1cadc86 100644 --- a/include/linux/iio/gyro/itg3200.h +++ b/include/linux/iio/gyro/itg3200.h @@ -102,6 +102,8 @@ struct itg3200 { struct i2c_client *i2c; struct iio_trigger *trig; struct iio_mount_matrix orientation; + /* lock to protect against multiple access to the device */ + struct mutex lock; }; enum ITG3200_SCAN_INDEX {