virgl: do not map zero-sized resource

When creating textures, we avoid creating backing-store for all
multisampled textures, not just depth buffers.

So we can't try to map them later. That's just going to fail. So
let's take the blit-based code-path that seems to avoid this problem.

This make this piglit test-case no longer crash (although it still
fails):

bin/copyteximage 2D -samples=2 -auto

Signed-off-by: Erik Faye-Lund <[email protected]>
Reviewed-by: Dave Airlie <[email protected]>

0 files changed, 0 insertions, 0 deletions