If a dedicated DMA device is specified for the DRM device, then the scatter list size limit should pertain to the DMA device.
Use the dedicated DMA device, if given, to limit the scatter list size. This only applies to drivers that have called drm_dev_set_dma_dev() and are using drm_prime_pages_to_sg() either directly or through the SHMEM helpers. At the time of this writing, the former case only includes the Rockchip DRM driver, while the latter case includes the gud, udl, and the tiny appletbdrm and gm12u320 drivers. Reviewed-by: Thomas Zimmermann <[email protected]> Signed-off-by: Chen-Yu Tsai <[email protected]> --- drivers/gpu/drm/drm_prime.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/drm_prime.c b/drivers/gpu/drm/drm_prime.c index 51fdb06d3e9f..9b44c78cd77f 100644 --- a/drivers/gpu/drm/drm_prime.c +++ b/drivers/gpu/drm/drm_prime.c @@ -859,7 +859,7 @@ struct sg_table *drm_prime_pages_to_sg(struct drm_device *dev, return ERR_PTR(-ENOMEM); if (dev) - max_segment = dma_max_mapping_size(dev->dev); + max_segment = dma_max_mapping_size(drm_dev_dma_dev(dev)); if (max_segment == 0) max_segment = UINT_MAX; err = sg_alloc_table_from_pages_segment(sg, pages, nr_pages, 0, -- 2.53.0.473.g4a7958ca14-goog
