[PATCH] drm/ttm: fixup ttm_bo_add_move_fence

[Christian König]

Am 13.04.22 um 10:44 schrieb 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://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgitlab.freedesktop.org%2Fdrm%2Fintel%2F-%2Fissues%2F5689&data=04%7C01%7Cchristian.koenig%40amd.com%7C989e8d698f6d4f0b37c508da1d29dfb4%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637854363041323745%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=8lxdsjPRiu%2Ft8O4kEHQEKtrMFd7gJbbFz25mYMRk3Ig%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>
>> ---
>>   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.

Well so far we one inversion of min/max, one missing put and the 
incorrect handling of the return code in i915.

Considering how complex the patches have been I think we are still 
pretty good.

Christian.

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