media: mtk-mdp: Fix a reference leak bug in mtk_mdp_remove()

[ Upstream commit f128bab ]

In mtk_mdp_probe(), vpu_get_plat_device() increases the reference
count of the returned platform device. Add platform_device_put()
to prevent reference leak.

Fixes: c8eb2d7 ("[media] media: Add Mediatek MDP Driver")
Cc: stable@vger.kernel.org
Signed-off-by: Haoxiang Li <haoxiang_li2024@163.com>
Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

Author: Haoxiang Li

drivers/media/platform/mediatek/mdp/mtk_mdp_core.c

@@ -254,6 +254,7 @@ static int mtk_mdp_remove(struct platform_device *pdev)
 
 	pm_runtime_disable(&pdev->dev);
 	vb2_dma_contig_clear_max_seg_size(&pdev->dev);
+	platform_device_put(mdp->vpu_dev);
 	mtk_mdp_unregister_m2m_device(mdp);
 	v4l2_device_unregister(&mdp->v4l2_dev);