Hi Am 16.02.21 um 12:37 schrieb Gerd Hoffmann:
Try avoid re-introducing locking bugs. Signed-off-by: Gerd Hoffmann <kraxel@xxxxxxxxxx>
Acked-by: Thomas Zimmermann <tzimmermann@xxxxxxx>IMHO this should eventually be done in the rsp TTM functions. But so far, I'd expect this to break some drivers.
Best regards Thomas
--- drivers/gpu/drm/qxl/qxl_object.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/qxl/qxl_object.c b/drivers/gpu/drm/qxl/qxl_object.c index 22748b9566af..90d5e5b7f927 100644 --- a/drivers/gpu/drm/qxl/qxl_object.c +++ b/drivers/gpu/drm/qxl/qxl_object.c @@ -162,6 +162,8 @@ int qxl_bo_kmap_locked(struct qxl_bo *bo, struct dma_buf_map *map) { int r;+ dma_resv_assert_held(bo->tbo.base.resv);+ if (bo->kptr) { bo->map_count++; goto out; @@ -236,6 +238,8 @@ void *qxl_bo_kmap_atomic_page(struct qxl_device *qdev,void qxl_bo_kunmap_locked(struct qxl_bo *bo){ + dma_resv_assert_held(bo->tbo.base.resv); + if (bo->kptr == NULL) return; bo->map_count--;
-- Thomas Zimmermann Graphics Driver Developer SUSE Software Solutions Germany GmbH Maxfeldstr. 5, 90409 Nürnberg, Germany (HRB 36809, AG Nürnberg) Geschäftsführer: Felix Imendörffer
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