if (unlikely(nvc0->vertex->instance_bufs & (1 << vbi))) {
/* TODO: use min and max instance divisor to get a proper range */
*base = 0;
- *size = (nvc0->vtxbuf[vbi].max_index + 1) * nvc0->vtxbuf[vbi].stride;
+ *size = nvc0->vtxbuf[vbi].buffer->width0;
} else {
assert(nvc0->vbo_max_index != ~0);
*base = nvc0->vbo_min_index * nvc0->vtxbuf[vbi].stride;