This is a note to let you know that I've just added the patch titled
media: mtk-jpeg: Set platform driver data earlier
to the 6.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
media-mtk-jpeg-set-platform-driver-data-earlier.patch
and it can be found in the queue-6.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 8329d0c7355bfb7237baf09ec979c3e8144d2781 Mon Sep 17 00:00:00 2001
From: Chen-Yu Tsai <wenst@xxxxxxxxxxxx>
Date: Mon, 10 Jul 2023 08:51:36 +0200
Subject: media: mtk-jpeg: Set platform driver data earlier
From: Chen-Yu Tsai <wenst@xxxxxxxxxxxx>
commit 8329d0c7355bfb7237baf09ec979c3e8144d2781 upstream.
In the multi-core JPEG encoder/decoder setup, the driver for the
individual cores references the parent device's platform driver data.
However, in the parent driver, this is only set at the end of the probe
function, way later than devm_of_platform_populate(), which triggers
the probe of the cores. This causes a kernel splat in the sub-device
probe function.
Move platform_set_drvdata() to before devm_of_platform_populate() to
fix this.
Fixes: 934e8bccac95 ("mtk-jpegenc: support jpegenc multi-hardware")
Signed-off-by: Chen-Yu Tsai <wenst@xxxxxxxxxxxx>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xxxxxxxxx>
Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c
+++ b/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c
@@ -1310,6 +1310,8 @@ static int mtk_jpeg_probe(struct platfor
jpeg->dev = &pdev->dev;
jpeg->variant = of_device_get_match_data(jpeg->dev);
+ platform_set_drvdata(pdev, jpeg);
+
ret = devm_of_platform_populate(&pdev->dev);
if (ret) {
v4l2_err(&jpeg->v4l2_dev, "Master of platform populate failed.");
@@ -1381,8 +1383,6 @@ static int mtk_jpeg_probe(struct platfor
jpeg->variant->dev_name, jpeg->vdev->num,
VIDEO_MAJOR, jpeg->vdev->minor);
- platform_set_drvdata(pdev, jpeg);
-
pm_runtime_enable(&pdev->dev);
return 0;
Patches currently in stable-queue which might be from wenst@xxxxxxxxxxxx are
queue-6.4/media-mtk-jpeg-set-platform-driver-data-earlier.patch
