[PATCH] drm/vc4: plane: check drm_gem_plane_helper_prepare_fb() return value

[Simon Ser]

Bubble up any error to the caller.

Signed-off-by: Simon Ser <contact at emersion.fr>
Cc: Maxime Ripard <mripard at kernel.org>
Cc: Kees Cook <keescook at chromium.org>
Cc: Dave Stevenson <dave.stevenson at raspberrypi.com>
---
 drivers/gpu/drm/vc4/vc4_plane.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/vc4/vc4_plane.c b/drivers/gpu/drm/vc4/vc4_plane.c
index 00e713faecd5..b8184374332c 100644
--- a/drivers/gpu/drm/vc4/vc4_plane.c
+++ b/drivers/gpu/drm/vc4/vc4_plane.c
@@ -1497,13 +1497,16 @@ static int vc4_prepare_fb(struct drm_plane *plane,
 			  struct drm_plane_state *state)
 {
 	struct vc4_bo *bo;
+	int ret;
 
 	if (!state->fb)
 		return 0;
 
 	bo = to_vc4_bo(&drm_fb_dma_get_gem_obj(state->fb, 0)->base);
 
-	drm_gem_plane_helper_prepare_fb(plane, state);
+	ret = drm_gem_plane_helper_prepare_fb(plane, state);
+	if (ret)
+		return ret;
 
 	if (plane->state->fb == state->fb)
 		return 0;
-- 
2.43.0