# \[PATCH v2\] video: exynos\_dp: fix build warning due to uninitialized value

- From: Jingoo Han \<hidden\>
- Date: 2012-06-20 01:25:55 
- List: linux-fbdev
- Page: https://ratatoskr.run/linux-fbdev/2012/06/3881928
- Thread: https://ratatoskr.run/linux-fbdev/2012/06/3881928/t.md

```text
This patch fixes build warning due to uninitialized value dereference.

drivers/video/exynos/exynos_dp_core.c: In function 'exynos_dp_set_link_train':
drivers/video/exynos/exynos_dp_core.c:529:18: warning: 'reg' may be used uninitialized in this function [-Wuninitialized]
drivers/video/exynos/exynos_dp_core.c:395:6: note: 'reg' was declared here

Signed-off-by: Olof Johansson <redacted>
Signed-off-by: Jingoo Han <redacted>
---
 drivers/video/exynos/exynos_dp_core.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/drivers/video/exynos/exynos_dp_core.c b/drivers/video/exynos/exynos_dp_core.c
index a36b2d2..9db7b9f 100644
--- a/drivers/video/exynos/exynos_dp_core.c
+++ b/drivers/video/exynos/exynos_dp_core.c
@@ -407,6 +407,9 @@ static unsigned int exynos_dp_get_lane_link_training(
 	case 3:
 		reg = exynos_dp_get_lane3_link_training(dp);
 		break;
+	default:
+		WARN_ON(1);
+		return 0;
 	}
 
 	return reg;
-- 
1.7.1


```