This is a note to let you know that I've just added the patch titled
media: platform: mtk-mdp3: Fix return value check in mdp_probe()
to the 6.1-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-platform-mtk-mdp3-fix-return-value-check-in-md.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit d98548bf43e23fda0ccf9458ec6c15abb9a3c920
Author: Qiheng Lin <linqiheng@xxxxxxxxxx>
Date: Fri Dec 2 11:18:36 2022 +0100
media: platform: mtk-mdp3: Fix return value check in mdp_probe()
[ Upstream commit 1963689bed4d500236938d90c91cdd5e63c1eb28 ]
In case of error, the function mtk_mutex_get()
returns ERR_PTR() and never returns NULL. The NULL test in the
return value check should be replaced with IS_ERR().
And also fix the err_free_mutex case.
Fixes: 61890ccaefaf ("media: platform: mtk-mdp3: add MediaTek MDP3 driver")
Signed-off-by: Qiheng Lin <linqiheng@xxxxxxxxxx>
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: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c
index 2d1f6ae9f0802..97edcd9d1c817 100644
--- a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c
+++ b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c
@@ -207,8 +207,8 @@ static int mdp_probe(struct platform_device *pdev)
}
for (i = 0; i < MDP_PIPE_MAX; i++) {
mdp->mdp_mutex[i] = mtk_mutex_get(&mm_pdev->dev);
- if (!mdp->mdp_mutex[i]) {
- ret = -ENODEV;
+ if (IS_ERR(mdp->mdp_mutex[i])) {
+ ret = PTR_ERR(mdp->mdp_mutex[i]);
goto err_free_mutex;
}
}
@@ -289,7 +289,8 @@ static int mdp_probe(struct platform_device *pdev)
mdp_comp_destroy(mdp);
err_free_mutex:
for (i = 0; i < MDP_PIPE_MAX; i++)
- mtk_mutex_put(mdp->mdp_mutex[i]);
+ if (!IS_ERR_OR_NULL(mdp->mdp_mutex[i]))
+ mtk_mutex_put(mdp->mdp_mutex[i]);
err_destroy_device:
kfree(mdp);
err_return:
