20. 6. 19. 오후 7:36에 Marek Szyprowski 이(가) 쓴 글:
> Use common helper for checking the contiguity of the imported dma-buf.
>
> Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
Acked-by : Inki Dae <inki.dae@xxxxxxxxxxx>
Thanks,
Inki Dae
> ---
> drivers/gpu/drm/exynos/exynos_drm_gem.c | 23 +++--------------------
> 1 file changed, 3 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.c b/drivers/gpu/drm/exynos/exynos_drm_gem.c
> index efa476858db5..1716a023bca0 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_gem.c
> +++ b/drivers/gpu/drm/exynos/exynos_drm_gem.c
> @@ -431,27 +431,10 @@ exynos_drm_gem_prime_import_sg_table(struct drm_device *dev,
> {
> struct exynos_drm_gem *exynos_gem;
>
> - if (sgt->nents < 1)
> + /* check if the entries in the sg_table are contiguous */
> + if (drm_prime_get_contiguous_size(sgt) < attach->dmabuf->size) {
> + DRM_ERROR("buffer chunks must be mapped contiguously");
> return ERR_PTR(-EINVAL);
> -
> - /*
> - * Check if the provided buffer has been mapped as contiguous
> - * into DMA address space.
> - */
> - if (sgt->nents > 1) {
> - dma_addr_t next_addr = sg_dma_address(sgt->sgl);
> - struct scatterlist *s;
> - unsigned int i;
> -
> - for_each_sg(sgt->sgl, s, sgt->nents, i) {
> - if (!sg_dma_len(s))
> - break;
> - if (sg_dma_address(s) != next_addr) {
> - DRM_ERROR("buffer chunks must be mapped contiguously");
> - return ERR_PTR(-EINVAL);
> - }
> - next_addr = sg_dma_address(s) + sg_dma_len(s);
> - }
> }
>
> exynos_gem = exynos_drm_gem_init(dev, attach->dmabuf->size);
>
