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From:   Sasha Levin <sashal@kernel.org>
To:     linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc:     Hangyu Hua <hbh25y@gmail.com>,
        Hans Verkuil <hverkuil-cisco@xs4all.nl>,
        Mauro Carvalho Chehab <mchehab@kernel.org>,
        Sasha Levin <sashal@kernel.org>, neil.armstrong@linaro.org,
        khilman@baylibre.com, matthias.bgg@gmail.com,
        dafna.hirschfeld@collabora.com, vulab@iscas.ac.cn,
        rick.chang@mediatek.com, yong.wu@mediatek.com,
        colin.i.king@gmail.com, christophe.jaillet@wanadoo.fr,
        prabhakar.mahadev-lad.rj@bp.renesas.com, andrzej.hajda@intel.com,
        linux-media@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-amlogic@lists.infradead.org,
        linux-mediatek@lists.infradead.org
Subject: [PATCH AUTOSEL 5.15 03/47] media: platform: fix some double free in meson-ge2d and mtk-jpeg and s5p-mfc
Date:   Wed, 12 Oct 2022 20:20:38 -0400
Message-Id: <20221013002124.1894077-3-sashal@kernel.org>
In-Reply-To: <20221013002124.1894077-1-sashal@kernel.org>
References: <20221013002124.1894077-1-sashal@kernel.org>
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From: Hangyu Hua <hbh25y@gmail.com>

[ Upstream commit c65c3f3a2cbf21ed429d9b9c725bdb5dc6abf4cf ]

video_unregister_device will release device internally. There is no need to
call video_device_release after video_unregister_device.

Signed-off-by: Hangyu Hua <hbh25y@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/media/platform/meson/ge2d/ge2d.c        | 1 -
 drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c | 1 -
 drivers/media/platform/s5p-mfc/s5p_mfc.c        | 3 +--
 3 files changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/media/platform/meson/ge2d/ge2d.c b/drivers/media/platform/meson/ge2d/ge2d.c
index a373dea9866b..a885cbc99e38 100644
--- a/drivers/media/platform/meson/ge2d/ge2d.c
+++ b/drivers/media/platform/meson/ge2d/ge2d.c
@@ -1032,7 +1032,6 @@ static int ge2d_remove(struct platform_device *pdev)
 
 	video_unregister_device(ge2d->vfd);
 	v4l2_m2m_release(ge2d->m2m_dev);
-	video_device_release(ge2d->vfd);
 	v4l2_device_unregister(&ge2d->v4l2_dev);
 	clk_disable_unprepare(ge2d->clk);
 
diff --git a/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c b/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c
index a89c7b206eef..470f8f167744 100644
--- a/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c
+++ b/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c
@@ -1457,7 +1457,6 @@ static int mtk_jpeg_remove(struct platform_device *pdev)
 
 	pm_runtime_disable(&pdev->dev);
 	video_unregister_device(jpeg->vdev);
-	video_device_release(jpeg->vdev);
 	v4l2_m2m_release(jpeg->m2m_dev);
 	v4l2_device_unregister(&jpeg->v4l2_dev);
 	mtk_jpeg_clk_release(jpeg);
diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc.c b/drivers/media/platform/s5p-mfc/s5p_mfc.c
index f336a9543273..4fc135d9f38b 100644
--- a/drivers/media/platform/s5p-mfc/s5p_mfc.c
+++ b/drivers/media/platform/s5p-mfc/s5p_mfc.c
@@ -1406,6 +1406,7 @@ static int s5p_mfc_probe(struct platform_device *pdev)
 /* Deinit MFC if probe had failed */
 err_enc_reg:
 	video_unregister_device(dev->vfd_dec);
+	dev->vfd_dec = NULL;
 err_dec_reg:
 	video_device_release(dev->vfd_enc);
 err_enc_alloc:
@@ -1451,8 +1452,6 @@ static int s5p_mfc_remove(struct platform_device *pdev)
 
 	video_unregister_device(dev->vfd_enc);
 	video_unregister_device(dev->vfd_dec);
-	video_device_release(dev->vfd_enc);
-	video_device_release(dev->vfd_dec);
 	v4l2_device_unregister(&dev->v4l2_dev);
 	s5p_mfc_unconfigure_dma_memory(dev);
 
-- 
2.35.1