From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by archive.lwn.net (Postfix) with ESMTP id 2F1C29D3C0 for ; Tue, 23 Jun 2020 16:39:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732548AbgFWQjQ (ORCPT ); Tue, 23 Jun 2020 12:39:16 -0400 Received: from relay3-d.mail.gandi.net ([217.70.183.195]:56317 "EHLO relay3-d.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732174AbgFWQjP (ORCPT ); Tue, 23 Jun 2020 12:39:15 -0400 X-Originating-IP: 93.34.118.233 Received: from uno.lan (93-34-118-233.ip49.fastwebnet.it [93.34.118.233]) (Authenticated sender: jacopo@jmondi.org) by relay3-d.mail.gandi.net (Postfix) with ESMTPSA id 7FB556000E; Tue, 23 Jun 2020 16:39:11 +0000 (UTC) From: Jacopo Mondi To: mchehab@kernel.org, sakari.ailus@linux.intel.com, hverkuil@xs4all.nl, laurent.pinchart@ideasonboard.com, roman.kovalivskyi@globallogic.com, dave.stevenson@raspberrypi.org, naush@raspberrypi.com Cc: mrodin@de.adit-jv.com, hugues.fruchet@st.com, mripard@kernel.org, aford173@gmail.com, sudipi@jp.adit-jv.com, andrew_gabbasov@mentor.com, erosca@de.adit-jv.com, linux-media@vger.kernel.org, libcamera-devel@lists.libcamera.org, Jacopo Mondi Subject: [PATCH 12/25] media: ov5647: Protect s_stream() with mutex Date: Tue, 23 Jun 2020 18:42:21 +0200 Message-Id: <20200623164224.44476-2-jacopo@jmondi.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200623100815.10674-1-jacopo@jmondi.org> References: <20200623100815.10674-1-jacopo@jmondi.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Archived-At: List-Archive: List-Post: Use the driver mutex to protect s_stream() operations. This will become more relevant once the sensor will support more formats and set_format() could be issue concurrently to s_stream(). Signed-off-by: Jacopo Mondi --- drivers/media/i2c/ov5647.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/drivers/media/i2c/ov5647.c b/drivers/media/i2c/ov5647.c index 859cc5b0d14a3..2d2829f934c3c 100644 --- a/drivers/media/i2c/ov5647.c +++ b/drivers/media/i2c/ov5647.c @@ -460,10 +460,17 @@ static const struct v4l2_subdev_core_ops ov5647_subdev_core_ops = { static int ov5647_s_stream(struct v4l2_subdev *sd, int enable) { + struct ov5647 *sensor = to_state(sd); + int ret; + + mutex_lock(&sensor->lock); if (enable) - return ov5647_stream_on(sd); + ret = ov5647_stream_on(sd); else - return ov5647_stream_off(sd); + ret = ov5647_stream_off(sd); + mutex_unlock(&sensor->lock); + + return ret; } static const struct v4l2_subdev_video_ops ov5647_subdev_video_ops = { -- 2.27.0