[PATCH 4/5] util: vircgroupv2: enable CPU controller only if it's available

[Pavel Hrdina <phrdina@xxxxxxxxxx>]

It might happen that we are not able to enable CPU controller so we
can enable it for thread sub-cgroups only if it's available in parent
cgroup.

Signed-off-by: Pavel Hrdina <phrdina@xxxxxxxxxx>
---
 src/util/vircgroupv2.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/util/vircgroupv2.c b/src/util/vircgroupv2.c
index f3a119b689..6eeebe2230 100644
--- a/src/util/vircgroupv2.c
+++ b/src/util/vircgroupv2.c
@@ -404,7 +404,8 @@ virCgroupV2MakeGroup(virCgroupPtr parent ATTRIBUTE_UNUSED,
                 return -1;
             }
 
-            if (virCgroupV2EnableController(parent,
+            if (virCgroupV2HasController(parent, VIR_CGROUP_CONTROLLER_CPU) &&
+                virCgroupV2EnableController(parent,
                                             VIR_CGROUP_CONTROLLER_CPU) < 0) {
                 return -1;
             }
-- 
2.21.0

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