[PATCH v1 5/7] xen-bus: Set offline if backend's state is XenbusStateClosed

[Volodymyr Babchuk]

From: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>

Both state (XenbusStateClosed) and online (0) are expected by
toolstack/xl devd to completely destroy the device. But "offline"
is never being set by the backend resulting in timeout during
domain destruction, garbage in Xestore and still running Qemu
instance.

Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>
Signed-off-by: Volodymyr Babchuk <volodymyr_babchuk@epam.com>
---
 hw/xen/xen-bus.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/hw/xen/xen-bus.c b/hw/xen/xen-bus.c
index 75474d4b43..6e7ec3af64 100644
--- a/hw/xen/xen-bus.c
+++ b/hw/xen/xen-bus.c
@@ -519,6 +519,10 @@ static void xen_device_backend_changed(void *opaque, const 
char *path)
         xen_device_backend_set_state(xendev, XenbusStateClosed);
     }
 
+    if (xen_device_backend_get_state(xendev) == XenbusStateClosed) {
+        xen_device_backend_set_online(xendev, false);
+    }
+
     /*
      * If a backend is still 'online' then we should leave it alone but,
      * if a backend is not 'online', then the device is a candidate
-- 
2.42.0