cgroup: correct mangling of return values

Let's nor return the unmangled return value before we actually mangle
it.

Fixes: #11062

diff --git a/src/core/cgroup.c b/src/core/cgroup.c
index 75085607d4663270364636adfe50562000b81ab0..55900479767b53483ec1f62075e14f74dc71b3b9 100644 (file)
--- a/src/core/cgroup.c
+++ b/src/core/cgroup.c
@@ -2856,10 +2856,10 @@ static int unit_get_cpu_usage_raw(Unit *u, nsec_t *ret) {
                 uint64_t us;
 
                 r = cg_get_keyed_attribute("cpu", u->cgroup_path, "cpu.stat", STRV_MAKE("usage_usec"), &val);
-                if (r < 0)
-                        return r;
                 if (IN_SET(r, -ENOENT, -ENXIO))
                         return -ENODATA;
+                if (r < 0)
+                        return r;
 
                 r = safe_atou64(val, &us);
                 if (r < 0)