[PATCH] drm/ttm: fixup ttm_bo_add_move_fence

[Daniel Vetter]

On Wed, Apr 13, 2022 at 09:21:33AM +0100, Matthew Auld wrote:
> It looks like we still need to call dma_fence_put() on the man->move,
> otherwise we just end up leaking it, leading to fireworks later.
> 
> Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/5689
> Fixes: 8bb31587820a ("drm/ttm: remove bo->moving")
> Cc: Christian König <christian.koenig at amd.com>
> Cc: Daniel Vetter <daniel.vetter at ffwll.ch>
> Signed-off-by: Matthew Auld <matthew.auld at intel.com>
> ---
>  drivers/gpu/drm/ttm/ttm_bo.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
> index 015a94f766de..b15b77e10383 100644
> --- a/drivers/gpu/drm/ttm/ttm_bo.c
> +++ b/drivers/gpu/drm/ttm/ttm_bo.c
> @@ -744,6 +744,8 @@ static int ttm_bo_add_move_fence(struct ttm_buffer_object *bo,
>  		dma_fence_put(fence);
>  		return ret;
>  	}
> +
> +	dma_fence_put(fence);

Please delete the above if () and simplify the function tail to

	dma_fence_put(fence);
	return ret;

With that Reviewed-by: Daniel Vetter <daniel.vetter at ffwll.ch>

And thanks a lot for catching this, I guess I get a prize for most useless
review ever :-/ Hopefully this one here is better.
-Daniel


>  	return 0;
>  }
>  
> -- 
> 2.34.1
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch