[libvirt] [PATCH 03/12] Clarify virDomainDetachDeviceFlags documentation

[Jiri Denemark]

---
 src/libvirt.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/libvirt.c b/src/libvirt.c
index 4dc91d7..860188b 100644
--- a/src/libvirt.c
+++ b/src/libvirt.c
@@ -10825,6 +10825,18 @@ error:
  * block copy operation on the device being detached; in that case,
  * use virDomainBlockJobAbort() to stop the block copy first.
  *
+ * Beware that depending on the hypervisor and device type, detaching a device
+ * from a running domain may be asynchronous. That is, calling
+ * virDomainDetachDeviceFlags may just request device removal while the device
+ * is actually removed later (in cooperation with a guest OS). Previously,
+ * this fact was ignored and the device could have been removed from domain
+ * configuration before it was actually removed by the hypervisor causing
+ * various failures on subsequent operations. To check whether the device was
+ * successfully removed, either recheck domain configuration using
+ * virDomainGetXMLDesc() or add handler for VIR_DOMAIN_EVENT_ID_DEVICE_REMOVED
+ * event. In case the device is already gone when virDomainDetachDeviceFlags
+ * returns, the event is delivered before this API call ends.
+ *
  * Returns 0 in case of success, -1 in case of failure.
  */
 int
-- 
1.8.3.2