gallium/radeon: disallow reallocation of shared buffers

Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>

diff --git a/src/gallium/drivers/radeon/r600_buffer_common.c b/src/gallium/drivers/radeon/r600_buffer_common.c
index 70c8eb2..33ba0fb 100644 (file)
--- a/src/gallium/drivers/radeon/r600_buffer_common.c
+++ b/src/gallium/drivers/radeon/r600_buffer_common.c
@@ -213,6 +213,10 @@ static bool
 r600_invalidate_buffer(struct r600_common_context *rctx,
                       struct r600_resource *rbuffer)
 {
+       /* Shared buffers can't be reallocated. */
+       if (rbuffer->is_shared)
+               return false;
+
        /* In AMD_pinned_memory, the user pointer association only gets
         * broken when the buffer is explicitly re-allocated.
         */