linux-kernel - [PATCH 5.12 391/677] media: i2c: imx219: Move out locking/unlocking of vflip and hflip controls from imx219_set

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Message-Id: <20210512144850.323760809@linuxfoundation.org>
Date:   Wed, 12 May 2021 16:47:17 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Pavel Machek <pavel@...x.de>,
        Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.12 391/677] media: i2c: imx219: Move out locking/unlocking of vflip and hflip controls from imx219_set_stream

From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>

[ Upstream commit 745d4612d2c853c00abadbf69799c8aee7f99c39 ]

Move out locking/unlocking of vflip and hflip controls from
imx219_set_stream() to the imx219_start_streaming()/
imx219_stop_streaming() respectively.

This fixes an issue in resume callback error path where streaming is
stopped and the controls are left in locked state.

Fixes: 1283b3b8f82b9 ("media: i2c: Add driver for Sony IMX219 sensor")
Reported-by: Pavel Machek <pavel@...x.de>
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@...ux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/media/i2c/imx219.c | 19 +++++++++++++------
 1 file changed, 13 insertions(+), 6 deletions(-)

diff --git a/drivers/media/i2c/imx219.c b/drivers/media/i2c/imx219.c
index 6e3382b85a90..82756cbfbaac 100644
--- a/drivers/media/i2c/imx219.c
+++ b/drivers/media/i2c/imx219.c
@@ -1056,8 +1056,16 @@ static int imx219_start_streaming(struct imx219 *imx219)
 		return ret;
 
 	/* set stream on register */
-	return imx219_write_reg(imx219, IMX219_REG_MODE_SELECT,
-				IMX219_REG_VALUE_08BIT, IMX219_MODE_STREAMING);
+	ret = imx219_write_reg(imx219, IMX219_REG_MODE_SELECT,
+			       IMX219_REG_VALUE_08BIT, IMX219_MODE_STREAMING);
+	if (ret)
+		return ret;
+
+	/* vflip and hflip cannot change during streaming */
+	__v4l2_ctrl_grab(imx219->vflip, true);
+	__v4l2_ctrl_grab(imx219->hflip, true);
+
+	return 0;
 }
 
 static void imx219_stop_streaming(struct imx219 *imx219)
@@ -1070,6 +1078,9 @@ static void imx219_stop_streaming(struct imx219 *imx219)
 			       IMX219_REG_VALUE_08BIT, IMX219_MODE_STANDBY);
 	if (ret)
 		dev_err(&client->dev, "%s failed to set stream\n", __func__);
+
+	__v4l2_ctrl_grab(imx219->vflip, false);
+	__v4l2_ctrl_grab(imx219->hflip, false);
 }
 
 static int imx219_set_stream(struct v4l2_subdev *sd, int enable)
@@ -1105,10 +1116,6 @@ static int imx219_set_stream(struct v4l2_subdev *sd, int enable)
 
 	imx219->streaming = enable;
 
-	/* vflip and hflip cannot change during streaming */
-	__v4l2_ctrl_grab(imx219->vflip, enable);
-	__v4l2_ctrl_grab(imx219->hflip, enable);
-
 	mutex_unlock(&imx219->mutex);
 
 	return ret;
-- 
2.30.2