Commit 9a67bc4a authored Apr 20, 2020 by Anand K Mistry Committed by Chun-Kuang Hu May 21, 2020

drm/mediatek: Stop iterating dma addresses when sg_dma_len() == 0



If dma_map_sg() merges pages when creating the mapping, only the first
entries will have a valid sg_dma_address() and sg_dma_len(), followed by
entries with sg_dma_len() == 0.

Signed-off-by: Anand K Mistry <amistry@google.com>
Signed-off-by: Anand K Mistry <amistry@chromium.org>
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>

parent 424a3a70

drivers/gpu/drm/mediatek/mtk_drm_gem.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -224,6 +224,9 @@ struct drm_gem_object mtk_gem_prime_import_sg_table(struct drm_device dev,

		expected = sg_dma_address(sg->sgl);
		for_each_sg(sg->sgl, s, sg->nents, i) {
		if (!sg_dma_len(s))
		break;

		if (sg_dma_address(s) != expected) {
		DRM_ERROR("sg_table is not contiguous");
		ret = -EINVAL;

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