[libvirt PATCH 1/2] qemu: do not revert to NULL bandwidth

[Ján Tomko <jtomko@xxxxxxxxxx>]

Otherwise an attempt to set an invalid value:
  virsh domiftune rhel8.2 vnet0 --outbound 4294968
on an interface with no bandwidth set crashes.

Signed-off-by: Ján Tomko <jtomko@xxxxxxxxxx>
Fixes: f02e21cb3379a41cd42f2d8116f2d10dabace83b
https://bugzilla.redhat.com/show_bug.cgi?id=1800505
---
 src/qemu/qemu_driver.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 502f4ce342..0324c771a5 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -11665,8 +11665,10 @@ qemuDomainSetInterfaceParameters(virDomainPtr dom,
                                                net->bandwidth,
                                                false,
                                                !virDomainNetTypeSharesHostView(net)));
-            ignore_value(virDomainNetBandwidthUpdate(net,
-                                                     net->bandwidth));
+            if (net->bandwidth) {
+                ignore_value(virDomainNetBandwidthUpdate(net,
+                                                         net->bandwidth));
+            }
             goto endjob;
         }
 
-- 
2.21.1