nouveau: support NULL-resources

It's legal for a buffer-object to have a NULL-resource, but let's just
skip over it, as there's nothing to do.

Signed-off-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Acked-by: Karol Herbst <kherbst@redhat.com>

2 files changed, 10 insertions, 3 deletions

diff --git a/src/gallium/drivers/nouveau/nv50/nv50_push.c b/src/gallium/drivers/nouveau/nv50/nv50_push.c
index bec2d42e037..15666d346c1 100644
--- a/src/gallium/drivers/nouveau/nv50/nv50_push.c
+++ b/src/gallium/drivers/nouveau/nv50/nv50_push.c
@@ -264,10 +264,13 @@ nv50_push_vbo(struct nv50_context *nv50, const struct pipe_draw_info *info)
       const struct pipe_vertex_buffer *vb = &nv50->vtxbuf[i];
       const uint8_t *data;
 
-      if (unlikely(!vb->is_user_buffer))
+      if (unlikely(!vb->is_user_buffer)) {
+         if (!vb->buffer.resource)
+            continue;
+
          data = nouveau_resource_map_offset(&nv50->base,
             nv04_resource(vb->buffer.resource), vb->buffer_offset, NOUVEAU_BO_RD);
-      else
+      } else
          data = vb->buffer.user;
 
       if (apply_bias && likely(!(nv50->vertex->instance_bufs & (1 << i))))
diff --git a/src/gallium/drivers/nouveau/nvc0/nvc0_vbo_translate.c b/src/gallium/drivers/nouveau/nvc0/nvc0_vbo_translate.c
index 4333fb26d23..64903fc5cf0 100644
--- a/src/gallium/drivers/nouveau/nvc0/nvc0_vbo_translate.c
+++ b/src/gallium/drivers/nouveau/nvc0/nvc0_vbo_translate.c
@@ -71,9 +71,13 @@ nvc0_vertex_configure_translate(struct nvc0_context *nvc0, int32_t index_bias)
 
       if (likely(vb->is_user_buffer))
          map = (const uint8_t *)vb->buffer.user;
-      else
+      else {
+         if (!vb->buffer.resource)
+            continue;
+
          map = nouveau_resource_map_offset(&nvc0->base,
             nv04_resource(vb->buffer.resource), vb->buffer_offset, NOUVEAU_BO_RD);
+      }
 
       if (index_bias && !unlikely(nvc0->vertex->instance_bufs & (1 << i)))
          map += (intptr_t)index_bias * vb->stride;