[patch 3/3 -next] drm/vc4: fix an error code

[Dan Carpenter]

"exec->exec_bo" is NULL at this point so this code returns success.  We
want to return -ENOMEM.

Fixes: d5b1a78a772f ('drm/vc4: Add support for drawing 3D frames.')
Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com>

diff --git a/drivers/gpu/drm/vc4/vc4_gem.c b/drivers/gpu/drm/vc4/vc4_gem.c
index 2a680d9..98a25b8 100644
--- a/drivers/gpu/drm/vc4/vc4_gem.c
+++ b/drivers/gpu/drm/vc4/vc4_gem.c
@@ -580,7 +580,7 @@ vc4_get_bcl(struct drm_device *dev, struct vc4_exec_info 
*exec)
        bo = vc4_bo_create(dev, exec_size, true);
        if (!bo) {
                DRM_ERROR("Couldn't allocate BO for binning\n");
-               ret = PTR_ERR(exec->exec_bo);
+               ret = -ENOMEM;
                goto fail;
        }
        exec->exec_bo = &bo->base;