[Mesa-dev] [PATCH 12/26] gallium/radeon: check that handle usage doesn't change for a resource

[Marek Olšák]

From: Marek Olšák <marek.olsak at amd.com>

---
 src/gallium/drivers/radeon/r600_pipe_common.h | 1 +
 src/gallium/drivers/radeon/r600_texture.c     | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/src/gallium/drivers/radeon/r600_pipe_common.h b/src/gallium/drivers/radeon/r600_pipe_common.h
index 4cef5ef..3bbbfbb 100644
--- a/src/gallium/drivers/radeon/r600_pipe_common.h
+++ b/src/gallium/drivers/radeon/r600_pipe_common.h
@@ -169,6 +169,7 @@ struct r600_resource {
 
 	/* Whether the resource has been exported via resource_get_handle. */
 	bool				is_shared;
+	unsigned			external_usage; /* PIPE_HANDLE_USAGE_* */
 };
 
 struct r600_transfer {
diff --git a/src/gallium/drivers/radeon/r600_texture.c b/src/gallium/drivers/radeon/r600_texture.c
index 558dc73..5f49dd7 100644
--- a/src/gallium/drivers/radeon/r600_texture.c
+++ b/src/gallium/drivers/radeon/r600_texture.c
@@ -261,11 +261,14 @@ static boolean r600_texture_get_handle(struct pipe_screen* screen,
 
 	if (!res->is_shared) {
 		res->is_shared = true;
+		res->external_usage = usage;
 
 		if (resource->target != PIPE_BUFFER) {
 			r600_texture_init_metadata(rtex, &metadata);
 			rscreen->ws->buffer_set_metadata(res->buf, &metadata);
 		}
+	} else {
+		assert(res->external_usage == usage);
 	}
 
 	return rscreen->ws->buffer_get_handle(res->buf,
-- 
2.5.0