llvmpipe: Ensure transfers are mapped.

This shouldn't happen but it does by some misterious reason. Fail the
assertion but at least do not segfault on release builds.

diff --git a/src/gallium/drivers/llvmpipe/lp_tile_cache.c b/src/gallium/drivers/llvmpipe/lp_tile_cache.c
index 50891c42271b88a54dfa53751b6ab249edc134a1..e83210f93bc32acdfb70d2884d04b93b7ad9aaf4 100644 (file)
--- a/src/gallium/drivers/llvmpipe/lp_tile_cache.c
+++ b/src/gallium/drivers/llvmpipe/lp_tile_cache.c
@@ -290,6 +290,10 @@ lp_get_cached_tile(struct llvmpipe_tile_cache *tc,
    
    assert(tc->surface);
    assert(tc->transfer);
+   assert(tc->transfer_map);
+
+   if(!tc->transfer_map)
+      lp_tile_cache_map_transfers(tc);
 
    switch(tile->status) {
    case LP_TILE_STATUS_CLEAR: