r600g: don't unmap if we haven't mapped

should fix https://bugs.freedesktop.org/show_bug.cgi?id=37157

Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/src/gallium/winsys/r600/drm/radeon_bo.c b/src/gallium/winsys/r600/drm/radeon_bo.c
index 9a534dd..cd817fc 100644 (file)
--- a/src/gallium/winsys/r600/drm/radeon_bo.c
+++ b/src/gallium/winsys/r600/drm/radeon_bo.c
@@ -64,8 +64,10 @@ int radeon_bo_fixed_map(struct radeon *radeon, struct radeon_bo *bo)
 
 static void radeon_bo_fixed_unmap(struct radeon *radeon, struct radeon_bo *bo)
 {
-       munmap(bo->data, bo->size);
-       bo->data = NULL;
+       if (bo->data) {
+               munmap(bo->data, bo->size);
+               bo->data = NULL;
+       }
 }
 
 struct radeon_bo *radeon_bo(struct radeon *radeon, unsigned handle,