[libvirt] [PATCH 3/3] util: Check/ignore already disabled event
If the event is already disabled, then don't bother with setting it
disabled again. Causes unnecessary error on systems that don't support
the feature anyway.
Signed-off-by: John Ferlan <jferlan(a)redhat.com>
---
src/util/virperf.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/src/util/virperf.c b/src/util/virperf.c
index 6387430..5d57962 100644
--- a/src/util/virperf.c
+++ b/src/util/virperf.c
@@ -234,6 +234,9 @@ virPerfEventDisable(virPerfPtr perf,
if (event == NULL)
return -1;
+ if (!event->enabled)
+ return 0;
+
if (ioctl(event->fd, PERF_EVENT_IOC_DISABLE) < 0) {
virReportSystemError(errno,
_("unable to disable host cpu perf event for
%s"),
--
2.7.4