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drm/udl: properly check for error pointers 

The drm_prime_pages_to_sg() function never returns NULL pointers, only
error pointers and valid pointers.

Signed-off-by: Haixia Shi <hshi@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
hifive-unleashed-5.1
Haixia Shi 2014-11-25 12:04:03 -08:00 committed by Dave Airlie
parent 4bc158e0be
commit e38648f95d
1 changed files with 3 additions and 3 deletions
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6
drivers/gpu/drm/udl/udl_dmabuf.c
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@ -99,9 +99,9 @@ static struct sg_table *udl_map_dma_buf(struct dma_buf_attachment *attach,
page_count = obj->base.size / PAGE_SIZE;
obj->sg = drm_prime_pages_to_sg(obj->pages, page_count);
if (!obj->sg) {
DRM_ERROR("sg is null.\n");
return ERR_PTR(-ENOMEM);
if (IS_ERR(obj->sg)) {
DRM_ERROR("failed to allocate sgt.\n");
return ERR_CAST(obj->sg);
}
sgt = &udl_attach->sgt;