[PATCH] media: renesas-ceu: fix a potential NULL pointer dereference

[Kangjie Lu]

In case of_match_device cannot find a match, the check returns
-EINVAL to avoid a potential NULL pointer dereference

Signed-off-by: Kangjie Lu <k...@umn.edu>
---
 drivers/media/platform/renesas-ceu.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/media/platform/renesas-ceu.c 
b/drivers/media/platform/renesas-ceu.c
index 150196f7cf96..4aa807c0b6c7 100644
--- a/drivers/media/platform/renesas-ceu.c
+++ b/drivers/media/platform/renesas-ceu.c
@@ -1682,7 +1682,10 @@ static int ceu_probe(struct platform_device *pdev)
 
        if (IS_ENABLED(CONFIG_OF) && dev->of_node) {
                ceu_data = of_match_device(ceu_of_match, dev)->data;
-               num_subdevs = ceu_parse_dt(ceudev);
+               if (unlikely(!ceu_data))
+                       num_subdevs = -EINVAL;
+               else
+                       num_subdevs = ceu_parse_dt(ceudev);
        } else if (dev->platform_data) {
                /* Assume SH4 if booting with platform data. */
                ceu_data = &ceu_data_sh4;
-- 
2.17.1