From 65be7572d2ef0228b111c2a1bbc90ee95179b706 Mon Sep 17 00:00:00 2001
From: John Ferlan <jferlan@redhat.com>
Date: Wed, 8 Oct 2014 17:51:19 -0400
Subject: [PATCH] hotplug: Check for alias in controller detach

In qemuDomainDetachControllerDevice if the info.alias already exists
a call to qemuAssignDeviceControllerAlias would overwrite the existing
so avoid this possibility.
---
 src/qemu/qemu_hotplug.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c
index 1e504ec591..9c0f6c90ff 100644
--- a/src/qemu/qemu_hotplug.c
+++ b/src/qemu/qemu_hotplug.c
@@ -3226,7 +3226,8 @@ int qemuDomainDetachControllerDevice(virQEMUDriverPtr driver,
         goto cleanup;
     }
 
-    if (virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_DEVICE)) {
+    if (virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_DEVICE) &&
+        !detach->info.alias) {
         if (qemuAssignDeviceControllerAlias(detach) < 0)
             goto cleanup;
     }
-- 
2.47.2