4.20-stable review patch. If anyone has any objections, please let me know.
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[ Upstream commit 8ea0f2ba0fa3f91ea1b8d823a54b042026ada6b3 ]
of_parse_phandle() returns the device node with refcount incremented. There are two nodes that are used temporary in mtk_vcodec_init_enc_pm(), but their refcounts are not decremented.
The patch adds one of_node_put() and fixes returning error codes.
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Alexey Khoroshilov khoroshilov@ispras.ru Signed-off-by: Hans Verkuil hverkuil@xs4all.nl Signed-off-by: Mauro Carvalho Chehab mchehab+samsung@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/media/platform/mtk-vcodec/mtk_vcodec_enc_pm.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc_pm.c b/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc_pm.c index 3e73e9db781f..7c025045ea90 100644 --- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc_pm.c +++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc_pm.c @@ -41,25 +41,27 @@ int mtk_vcodec_init_enc_pm(struct mtk_vcodec_dev *mtkdev) node = of_parse_phandle(dev->of_node, "mediatek,larb", 0); if (!node) { mtk_v4l2_err("no mediatek,larb found"); - return -1; + return -ENODEV; } pdev = of_find_device_by_node(node); + of_node_put(node); if (!pdev) { mtk_v4l2_err("no mediatek,larb device found"); - return -1; + return -ENODEV; } pm->larbvenc = &pdev->dev;
node = of_parse_phandle(dev->of_node, "mediatek,larb", 1); if (!node) { mtk_v4l2_err("no mediatek,larb found"); - return -1; + return -ENODEV; }
pdev = of_find_device_by_node(node); + of_node_put(node); if (!pdev) { mtk_v4l2_err("no mediatek,larb device found"); - return -1; + return -ENODEV; }
pm->larbvenclt = &pdev->dev;