[libvirt] [PATCH] qemu: hotplug: Fix asynchronous unplug of 'shmem'

[Peter Krempa]

commit 5c81c342a7 forgot to skip the detaching of the shmem backend
when async unplug is requested which meant that we've tried to unplug
the backend prior to delivery of the DEVICE_DELETED event.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1618622

Signed-off-by: Peter Krempa <pkrempa at redhat.com>
---
 src/qemu/qemu_hotplug.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c
index 5b52fe9edc..fa490c53e1 100644
--- a/src/qemu/qemu_hotplug.c
+++ b/src/qemu/qemu_hotplug.c
@@ -5479,11 +5479,16 @@ qemuDomainDetachShmemDevice(virQEMUDriverPtr driver,
     if (qemuDomainObjExitMonitor(driver, vm) < 0)
         goto cleanup;

-    if ((ret = qemuDomainWaitForDeviceRemoval(vm)) == 1)
-        ret = qemuDomainRemoveShmemDevice(driver, vm, shmem);
+    if (async) {
+        ret = 0;
+    } else {
+        if ((ret = qemuDomainWaitForDeviceRemoval(vm)) == 1)
+            ret = qemuDomainRemoveShmemDevice(driver, vm, shmem);
+    }

  cleanup:
-    qemuDomainResetDeviceRemoval(vm);
+    if (!async)
+        qemuDomainResetDeviceRemoval(vm);
     return ret;
 }

-- 
2.16.2