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-rw-r--r--src/gallium/auxiliary/draw/draw_pt_varray_tmp_linear.h7
1 files changed, 6 insertions, 1 deletions
diff --git a/src/gallium/auxiliary/draw/draw_pt_varray_tmp_linear.h b/src/gallium/auxiliary/draw/draw_pt_varray_tmp_linear.h
index a292346be95..55e43b2a714 100644
--- a/src/gallium/auxiliary/draw/draw_pt_varray_tmp_linear.h
+++ b/src/gallium/auxiliary/draw/draw_pt_varray_tmp_linear.h
@@ -1,6 +1,11 @@
static unsigned trim( unsigned count, unsigned first, unsigned incr )
{
- return count - (count - first) % incr;
+ /*
+ * count either has been trimmed in draw_pt_arrays or is set to
+ * (driver)_fetch_max which is hopefully always larger than first.
+ */
+ assert(count >= first);
+ return count - (count - first) % incr;
}
static void FUNC(struct draw_pt_front_end *frontend,