drm/i915/dmabuf: Use scatterlist for_each_sg API

Update open coded for loop to use the standard scatterlist
for_each_sg API.

Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221028155029.494736-4-matthew.auld@intel.com

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c b/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c
index 5359745..98b2d29 100644 (file)
--- a/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c
@@ -47,12 +47,10 @@ static struct sg_table *i915_gem_map_dma_buf(struct dma_buf_attachment *attach,
        if (ret)
                goto err_free;
 
-       src = obj->mm.pages->sgl;
        dst = sgt->sgl;
-       for (i = 0; i < obj->mm.pages->orig_nents; i++) {
+       for_each_sg(obj->mm.pages->sgl, src, obj->mm.pages->orig_nents, i) {
                sg_set_page(dst, sg_page(src), src->length, 0);
                dst = sg_next(dst);
-               src = sg_next(src);
        }
 
        ret = dma_map_sgtable(attach->dev, sgt, dir, DMA_ATTR_SKIP_CPU_SYNC);