[Intel-gfx] [PATCH v2 7/8] drm/displayid: allow data blocks with 0 payload length

[Jani Nikula]

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 at intel.com>
---
 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