svga: Fix banded DMA upload unmap

Even with banded DMA uploads, st->hwbuf is always non-NULL, but when we've
allocated a software buffer to hold the full upload, unmapping of the
hardware buffer has already been done before
svga_texture_transfer_unmap_dma(), and the code was performing an unmap of
an already mapped buffer.

Fix this by testing for software buffer not present.

Fixes: a9c4a861d5d ("svga: refactor svga_texture_transfer_map/unmap functions")
Signed-off-by: Thomas Hellstrom <[email protected]>
Reviewed-by: Brian Paul <[email protected]>
Reviewed-by: Charmaine Lee <[email protected]>
Reviewed-by: Roland Scheidegger <[email protected]>

0 files changed, 0 insertions, 0 deletions