qxl: fix surface tracking & locking

Surface tracking needs proper locking since it is used from vcpu and spice
worker threads, add it.  Also reset the surface counter when zapping all
surfaces.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/hw/qxl.h b/hw/qxl.h
index e62b9d00b2..5d0e85edb3 100644
--- a/hw/qxl.h
+++ b/hw/qxl.h
@@ -55,6 +55,8 @@ typedef struct PCIQXLDevice {
     } guest_surfaces;
     QXLPHYSICAL        guest_cursor;
 
+    QemuMutex          track_lock;
+
     /* thread signaling */
     pthread_t          main;
     int                pipe[2];