[PATCH] drm/amdgpu: Don't warn on destroying a pinned BO

[Michel Dänzer]

On 2018-07-24 02:47 PM, Christian König wrote:
> Am 23.07.2018 um 18:50 schrieb Michel Dänzer:
>> On 2018-07-19 05:39 PM, Michel Dänzer wrote:
>>> From: Michel Dänzer <michel.daenzer at amd.com>
>>>
>>> The warning turned out to be not so useful, as BO destruction tends to
>>> be deferred to a workqueue.
>>>
>>> Also, we should be preventing any damage from this now, so not really
>>> important anymore to fix code doing this.
>>>
>>> Signed-off-by: Michel Dänzer <michel.daenzer at amd.com>
>>> ---
>>>   drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 2 +-
>>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>>
>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
>>> index b12526ce1a9d..3010f0136de9 100644
>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
>>> @@ -89,7 +89,7 @@ static void amdgpu_ttm_bo_destroy(struct
>>> ttm_buffer_object *tbo)
>>>       struct amdgpu_device *adev = amdgpu_ttm_adev(tbo->bdev);
>>>       struct amdgpu_bo *bo = ttm_to_amdgpu_bo(tbo);
>>>   -    if (WARN_ON_ONCE(bo->pin_count > 0))
>>> +    if (bo->pin_count > 0)
>>>           amdgpu_bo_subtract_pin_size(bo);
>>>         if (bo->kfd_bo)
>>>
>> Any feedback?
> 
> I'm a bit torn on that. On the one hand the backtrace at this point is
> not very useful, but on the other hand it would still be nice to have a
> warning.
> 
> Maybe reduce it to a DRM_ERROR()?

I don't see that being useful; we'd still get reports about the errors,
but couldn't do anything about them.

Anyway, since the patch was on the list since last Thursday, I pushed it
this morning with Alex's review (thanks!).


-- 
Earthling Michel Dänzer               |               http://www.amd.com
Libre software enthusiast             |             Mesa and X developer