Kenneth Graunke
9fb5d7acbb
_tnl_draw_prims loops over the prims, and for each one, maps the VBOs,
draws, and unmaps them. But it failed to reset nr_bos = 0 between each
loop iteration, which meant that when processing prim[n], the BO list
had all BOs for prior primitives too. Assuming each primitive used the
same VBOs, that means the same VBO would appear in the list multiple
times, and it would try to unmap the same BO multiple times. This
triggered asserts on the second unmap, as it had already been unmapped.
Fixes Piglit's oes_draw_elements_base_vertex-multidrawelements on i915.
Fixes: e99e7aa4c1 ("mesa: switch Draw(Range)Elements(BaseVertex) calls to DrawGallium")
Acked-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8522>
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