[PATCH] drm: More debug info for fb leaks in mode_config_cleanup

[Noralf Trønnes]

Den 07.12.2017 15.49, skrev Daniel Vetter:
> We're spotting this very rarely in CI, but have no idea. Let's add
> more debug info about what's going on here.
>
> References: https://bugs.freedesktop.org/show_bug.cgi?id=102707
> Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
> ---

Acked-by: Noralf Trønnes <noralf at tronnes.org>

>   drivers/gpu/drm/drm_mode_config.c | 3 +++
>   1 file changed, 3 insertions(+)
>
> diff --git a/drivers/gpu/drm/drm_mode_config.c b/drivers/gpu/drm/drm_mode_config.c
> index cc78b3d9e5e4..6ffe952142e6 100644
> --- a/drivers/gpu/drm/drm_mode_config.c
> +++ b/drivers/gpu/drm/drm_mode_config.c
> @@ -469,6 +469,9 @@ void drm_mode_config_cleanup(struct drm_device *dev)
>   	 */
>   	WARN_ON(!list_empty(&dev->mode_config.fb_list));
>   	list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) {
> +		struct drm_printer p = drm_debug_printer("[leaked fb]");
> +		drm_printf(&p, "framebuffer[%u]:\n", fb->base.id);
> +		drm_framebuffer_print_info(&p, 1, fb);
>   		drm_framebuffer_free(&fb->base.refcount);
>   	}
>