devices: gpu: add resource bridge to fds to keep when jailed

BUG=chromium:837073
TEST=vmc start --enable-gpu tatl; lxc start stretch-x; xterm && glxgears

Change-Id: I3730fd8f2fc9d0ea4c0180d43f3253246fabd14a
Reviewed-on: https://chromium-review.googlesource.com/1401111
Commit-Ready: David Riley <davidriley@chromium.org>
Tested-by: David Riley <davidriley@chromium.org>
Reviewed-by: Zach Reizner <zachr@chromium.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/devices/src/virtio/gpu/mod.rs b/devices/src/virtio/gpu/mod.rs
index f2b7f12..6974e08 100644
--- a/devices/src/virtio/gpu/mod.rs
+++ b/devices/src/virtio/gpu/mod.rs
@@ -653,6 +653,9 @@ impl VirtioDevice for Gpu {
     fn keep_fds(&self) -> Vec<RawFd> {
         let mut keep_fds = Vec::new();
         keep_fds.push(self.exit_evt.as_raw_fd());
+        if let Some(ref resource_bridge) = self.resource_bridge {
+            keep_fds.push(resource_bridge.as_raw_fd());
+        }
         keep_fds
     }