diff options
| -rw-r--r-- | src/gallium/auxiliary/util/u_vbuf.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/src/gallium/auxiliary/util/u_vbuf.c b/src/gallium/auxiliary/util/u_vbuf.c index 95d7990c6ca..8a680d60a68 100644 --- a/src/gallium/auxiliary/util/u_vbuf.c +++ b/src/gallium/auxiliary/util/u_vbuf.c @@ -936,7 +936,16 @@ u_vbuf_upload_buffers(struct u_vbuf *mgr, size = mgr->ve->src_format_size[i]; } else if (instance_div) { /* Per-instance attrib. */ - unsigned count = (num_instances + instance_div - 1) / instance_div; + + /* Figure out how many instances we'll render given instance_div. We + * can't use the typical div_round_up() pattern because the CTS uses + * instance_div = ~0 for a test, which overflows div_round_up()'s + * addition. + */ + unsigned count = num_instances / instance_div; + if (count * instance_div != num_instances) + count++; + first += vb->stride * start_instance; size = vb->stride * (count - 1) + mgr->ve->src_format_size[i]; } else { |