Mesa (master): gallium/u_vbuf: skip draws with 0 vertices

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Module: Mesa
Branch: master
Commit: be8d811e57973e9d3632f90e47fda1f5c24ca379
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=be8d811e57973e9d3632f90e47fda1f5c24ca379

Author: Marek Olšák <marek.olsak at amd.com>
Date:   Tue Jan 26 00:35:10 2021 -0500

gallium/u_vbuf: skip draws with 0 vertices

Reviewed-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer at amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8298>

---

 src/gallium/auxiliary/util/u_vbuf.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/gallium/auxiliary/util/u_vbuf.c b/src/gallium/auxiliary/util/u_vbuf.c
index 4775591abad..02d40785f5b 100644
--- a/src/gallium/auxiliary/util/u_vbuf.c
+++ b/src/gallium/auxiliary/util/u_vbuf.c
@@ -1487,11 +1487,14 @@ void u_vbuf_draw_vbo(struct u_vbuf *mgr, const struct pipe_draw_info *info,
          new_draw.count = end_vertex - new_draw.start;
          new_info.instance_count = end_instance - new_info.start_instance;
 
-         if (new_draw.start == ~0u || !new_draw.count || !new_info.instance_count)
+         if (new_draw.start == ~0u)
             goto cleanup;
       }
    }
 
+   if (!new_draw.count || !new_info.instance_count)
+      goto cleanup;
+
    if (new_info.index_size) {
       /* See if anything needs to be done for per-vertex attribs. */
       if (u_vbuf_need_minmax_index(mgr)) {