drm/ttm: soften TTM warnings

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@amd.com>
References: https://lore.kernel.org/lkml/YD+eYcMMcdlXB8PY@alley/
Link: https://patchwork.freedesktop.org/patch/422834/
Reviewed-by: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>

diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index 20a2566..101a68d 100644 (file)
--- 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);
@@ -508,8 +509,11 @@ static void ttm_bo_release(struct kref *kref)
                 * Make pinned bos immediately available to
                 * shrinkers, now that they are queued for
                 * destruction.
+                *
+                * FIXME: QXL is triggering this. Can be removed when the
+                * driver is fixed.
                 */
-               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);
                }