[PATCH] drm/kmb: Fix unsigned function returning negative constant

[Haowen Bai]

The function check_pixel_format has an unsigned return type, but returns a
negative constant to indicate an error condition. So we change unsigned
to int.

Signed-off-by: Haowen Bai <baihaowen at meizu.com>
---
 drivers/gpu/drm/kmb/kmb_plane.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/kmb/kmb_plane.c b/drivers/gpu/drm/kmb/kmb_plane.c
index 2735b8eb3537..5071b7029da6 100644
--- a/drivers/gpu/drm/kmb/kmb_plane.c
+++ b/drivers/gpu/drm/kmb/kmb_plane.c
@@ -65,7 +65,7 @@ static const u32 kmb_formats_v[] = {
 	DRM_FORMAT_NV12, DRM_FORMAT_NV21,
 };
 
-static unsigned int check_pixel_format(struct drm_plane *plane, u32 format)
+static int check_pixel_format(struct drm_plane *plane, u32 format)
 {
 	struct kmb_drm_private *kmb;
 	struct kmb_plane *kmb_plane = to_kmb_plane(plane);
-- 
2.7.4