[libvirt] [PATCH 1/5] qemu: Only set group_name when actually requested

[Martin Kletzander]

We were setting it based on whether it was supported and that lead to
setting it to NULL, which our JSON code caught.  However it ended up
producing the following results:

 $ virsh blkdeviotune fedora vda --total-bytes-sec-max 2000
 error: Unable to change block I/O throttle
 error: internal error: argument key 'group' must not have null value

Signed-off-by: Martin Kletzander <mkletzan at redhat.com>
---
 src/qemu/qemu_driver.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 516a851d3d55..f45972e3c823 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -17506,7 +17506,7 @@ qemuDomainSetBlockIoTune(virDomainPtr dom,
         qemuDomainObjEnterMonitor(driver, vm);
         ret = qemuMonitorSetBlockIoThrottle(priv->mon, device,
                                             &info, supportMaxOptions,
-                                            supportGroupNameOption,
+                                            set_fields & QEMU_BLOCK_IOTUNE_SET_GROUP_NAME,
                                             supportMaxLengthOptions);
         if (qemuDomainObjExitMonitor(driver, vm) < 0)
             ret = -1;
-- 
2.11.0