[PATCH 4.14 12/57] media: platform: mediatek: vpu: fix NULL ptr dereference

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Hans Verkuil <hverkuil-cisco@xs4all.nl>

[ Upstream commit 3df55cd773e8603b623425cc97b05e542854ad27 ]

If pdev is NULL, then it is still dereferenced.

This fixes this smatch warning:

drivers/media/platform/mediatek/vpu/mtk_vpu.c:570 vpu_load_firmware() warn: address of NULL pointer 'pdev'

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Cc: Yunfei Dong <yunfei.dong@mediatek.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/media/platform/mtk-vpu/mtk_vpu.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/media/platform/mtk-vpu/mtk_vpu.c b/drivers/media/platform/mtk-vpu/mtk_vpu.c
index 019a5e7e1a402..de5e732b1f0b6 100644
--- a/drivers/media/platform/mtk-vpu/mtk_vpu.c
+++ b/drivers/media/platform/mtk-vpu/mtk_vpu.c
@@ -536,16 +536,18 @@ static int load_requested_vpu(struct mtk_vpu *vpu,
 int vpu_load_firmware(struct platform_device *pdev)
 {
 	struct mtk_vpu *vpu;
-	struct device *dev = &pdev->dev;
+	struct device *dev;
 	struct vpu_run *run;
 	const struct firmware *vpu_fw = NULL;
 	int ret;
 
 	if (!pdev) {
-		dev_err(dev, "VPU platform device is invalid\n");
+		pr_err("VPU platform device is invalid\n");
 		return -EINVAL;
 	}
 
+	dev = &pdev->dev;
+
 	vpu = platform_get_drvdata(pdev);
 	run = &vpu->run;
 
-- 
2.40.1