The DisplayID specifications explicitly call out 0 as a valid payload length for data blocks. The mere presence of a data block, or the information coded in the block specific data (bits 7:3 in offset 1), may be enough to convey the necessary information. Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx> --- drivers/gpu/drm/drm_displayid.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/gpu/drm/drm_displayid.c b/drivers/gpu/drm/drm_displayid.c index 902ff6114b68..e0b9e58a9dc8 100644 --- a/drivers/gpu/drm/drm_displayid.c +++ b/drivers/gpu/drm/drm_displayid.c @@ -77,8 +77,7 @@ displayid_iter_block(const struct displayid_iter *iter) block = (const struct displayid_block *)&iter->section[iter->idx]; if (iter->idx + sizeof(*block) <= iter->length && - iter->idx + sizeof(*block) + block->num_bytes <= iter->length && - block->num_bytes > 0) + iter->idx + sizeof(*block) + block->num_bytes <= iter->length) return block; return NULL; -- 2.20.1 _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
