On 2025/09/03 7:42, Vivek Kasireddy wrote:
There are cases when a blob resource's backing might get detached
and re-attached again such as when the underlying object is getting
migrated in the Guest. In these situations, we need to obtain a new
dmabuf fd, which can be done by calling virtio_gpu_init_udmabuf().
It sounds like a bug fix. Perhaps you may add a Fixes: tag and reorder
patches to make this change come first.
Cc: Marc-André Lureau <marcandre.lur...@redhat.com>
Cc: Alex Bennée <alex.ben...@linaro.org>
Cc: Akihiko Odaki <od...@rsg.ci.i.u-tokyo.ac.jp>
Cc: Dmitry Osipenko <dmitry.osipe...@collabora.com>
Signed-off-by: Vivek Kasireddy <vivek.kasire...@intel.com>
---
hw/display/virtio-gpu.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/hw/display/virtio-gpu.c b/hw/display/virtio-gpu.c
index 2f9133c3b6..1654a417b8 100644
--- a/hw/display/virtio-gpu.c
+++ b/hw/display/virtio-gpu.c
@@ -938,6 +938,10 @@ virtio_gpu_resource_attach_backing(VirtIOGPU *g,
cmd->error = VIRTIO_GPU_RESP_ERR_UNSPEC;
return;
}
+
+ if (res->blob_size && res->dmabuf_fd < 0) {
+ virtio_gpu_init_udmabuf(res);
+ }
}
static void
