drm/rockchip: return ERR_PTR instead of NULL

rockchip_drm_framebuffer_init is only used in one case, in
rockchip_drm_fbdev.c, where its return value is tested using IS_ERR.  To
enable propagating the reason for the error, change the definition so that
it returns an ERR_PTR value.

Problem found with the help of Coccinelle.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_fb.c b/drivers/gpu/drm/rockchip/rockchip_drm_fb.c
index d5e1f8627d3864bdc4c0f7fbba869def8bf1fe3d..c9ccdf8f44bb2ba6ad049985b805f462d4a38af6 100644 (file)
--- a/drivers/gpu/drm/rockchip/rockchip_drm_fb.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_fb.c
@@ -213,7 +213,7 @@ rockchip_drm_framebuffer_init(struct drm_device *dev,
 
        rockchip_fb = rockchip_fb_alloc(dev, mode_cmd, &obj, 1);
        if (IS_ERR(rockchip_fb))
-               return NULL;
+               return ERR_CAST(rockchip_fb);
 
        return &rockchip_fb->fb;
 }