[PATCH] drm/ttm: fixup ttm_bo_add_move_fence

[Daniel Vetter]

On Wed, Apr 13, 2022 at 10:43:02AM +0200, Christian König wrote:
> Am 13.04.22 um 10:21 schrieb Matthew Auld:
> > 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://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgitlab.freedesktop.org%2Fdrm%2Fintel%2F-%2Fissues%2F5689&data=04%7C01%7Cchristian.koenig%40amd.com%7C2c316b01285b4deacfda08da1d26a778%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637854349105267939%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=bWuQuQm6N5Lf183uo%2BsEw%2FxMWQFYVkyfYnB6SH61fto%3D&reserved=0
> > 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>
> 
> Ah, yes! Previously we added the fence reference to bo->moving. I was
> already searching for that one as well.
> 
> Reviewed-by: Christian König <christian.koenig at amd.com>
> 
> Going to push it to drm-misc-next in a minute.

If you haven't pushed yet, pls also check my bikeshed, the code looks a
bit funny with this patch applied :-)
-Daniel

> 
> Thanks,
> Christian.
> 
> > ---
> >   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);
> >   	return 0;
> >   }
> 

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