[PATCH] drm/ttm: soften TTM warnings

[Christian König]

Am 03.03.21 um 18:19 schrieb Daniel Vetter:
> On Wed, Mar 3, 2021 at 4:57 PM Christian König
> <ckoenig.leichtzumerken at gmail.com> wrote:
>> QXL indeed unrefs pinned BOs and the warnings are spamming peoples log files.
>>
>> Make sure we warn only once until the QXL driver is fixed.
>>
>> Signed-off-by: Christian König <christian.koenig at amd.com>
> Can you pls add FIXME comments to each that qxl is broken and needs to
> be fixed first? Also please add a References: link to the bug report
> on lore.kernel.org or wherever it was.

Was there a bug report? I only got notifications by mail so far.

Christian.

>
> With that: r-b: me
> -Daniel
>
>> ---
>>   drivers/gpu/drm/ttm/ttm_bo.c | 5 +++--
>>   1 file changed, 3 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
>> index 20a25660b35b..245fa2c05927 100644
>> --- a/drivers/gpu/drm/ttm/ttm_bo.c
>> +++ b/drivers/gpu/drm/ttm/ttm_bo.c
>> @@ -136,7 +136,8 @@ void ttm_bo_move_to_lru_tail(struct ttm_buffer_object *bo,
>>          struct ttm_bo_device *bdev = bo->bdev;
>>          struct ttm_resource_manager *man;
>>
>> -       dma_resv_assert_held(bo->base.resv);
>> +       if (!bo->deleted)
>> +               dma_resv_assert_held(bo->base.resv);
>>
>>          if (bo->pin_count) {
>>                  ttm_bo_del_from_lru(bo);
>> @@ -509,7 +510,7 @@ static void ttm_bo_release(struct kref *kref)
>>                   * shrinkers, now that they are queued for
>>                   * destruction.
>>                   */
>> -               if (WARN_ON(bo->pin_count)) {
>> +               if (WARN_ON_ONCE(bo->pin_count)) {
>>                          bo->pin_count = 0;
>>                          ttm_bo_move_to_lru_tail(bo, &bo->mem, NULL);
>>                  }
>> --
>> 2.25.1
>>
>