minigbm: respect map_flags in all cases

When the map flags do not feature BO_TRANSFER_WRITE, we should
not copy back any shadow buffers we maintain.

BUG=b:67434931
TEST=android.view.cts.SurfaceViewSyncTests on Mediatek/Rockchip

Change-Id: I7078bfc5a8d770a52949d43ea68efc4a870e9227
Reviewed-on: https://chromium-review.googlesource.com/703875
Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>
Tested-by: Gurchetan Singh <gurchetansingh@chromium.org>
Commit-Queue: Gurchetan Singh <gurchetansingh@chromium.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/drv.h b/drv.h
index ad2f82a..e62d164 100644
--- a/drv.h
+++ b/drv.h
@@ -82,6 +82,7 @@ struct map_info {
 	void *addr;
 	size_t length;
 	uint32_t handle;
+	uint32_t map_flags;
 	int32_t refcount;
 	void *priv;
 };