linux-kernel - [PATCH 5.10 2/2] media: vim2m: initialize the media device earlier

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Date:   Wed, 25 May 2022 17:07:02 +0800
From:   Mark-PK Tsai <mark-pk.tsai@...iatek.com>
To:     <stable@...r.kernel.org>
CC:     <mchehab@...nel.org>, <matthias.bgg@...il.com>,
        <hverkuil-cisco@...all.nl>, <mark-pk.tsai@...iatek.com>,
        <sakari.ailus@...ux.intel.com>, <linux-media@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>, <yj.chiang@...iatek.com>,
        Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
Subject: [PATCH 5.10 2/2] media: vim2m: initialize the media device earlier

From: Hans Verkuil <hverkuil-cisco@...all.nl>

Before the video device node is registered, the v4l2_dev.mdev
pointer must be set in order to correctly associate the video
device with the media device. Move the initialization of the
media device up.

Signed-off-by: Hans Verkuil <hverkuil-cisco@...all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
(cherry picked from commit 1a28dce222a6ece725689ad58c0cf4a1b48894f4)
Signed-off-by: Mark-PK Tsai <mark-pk.tsai@...iatek.com>
---
 drivers/media/test-drivers/vim2m.c | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/drivers/media/test-drivers/vim2m.c b/drivers/media/test-drivers/vim2m.c
index 331a9053a0ed..a24624353f9e 100644
--- a/drivers/media/test-drivers/vim2m.c
+++ b/drivers/media/test-drivers/vim2m.c
@@ -1339,12 +1339,6 @@ static int vim2m_probe(struct platform_device *pdev)
 		goto error_dev;
 	}
 
-	ret = video_register_device(vfd, VFL_TYPE_VIDEO, 0);
-	if (ret) {
-		v4l2_err(&dev->v4l2_dev, "Failed to register video device\n");
-		goto error_m2m;
-	}
-
 #ifdef CONFIG_MEDIA_CONTROLLER
 	dev->mdev.dev = &pdev->dev;
 	strscpy(dev->mdev.model, "vim2m", sizeof(dev->mdev.model));
@@ -1353,7 +1347,15 @@ static int vim2m_probe(struct platform_device *pdev)
 	media_device_init(&dev->mdev);
 	dev->mdev.ops = &m2m_media_ops;
 	dev->v4l2_dev.mdev = &dev->mdev;
+#endif
 
+	ret = video_register_device(vfd, VFL_TYPE_VIDEO, 0);
+	if (ret) {
+		v4l2_err(&dev->v4l2_dev, "Failed to register video device\n");
+		goto error_m2m;
+	}
+
+#ifdef CONFIG_MEDIA_CONTROLLER
 	ret = v4l2_m2m_register_media_controller(dev->m2m_dev, vfd,
 						 MEDIA_ENT_F_PROC_VIDEO_SCALER);
 	if (ret) {
-- 
2.18.0