[libvirt] [PATCH] util: relax virNetDevSetCoalesce() stub

[Roman Bogorodskiy]

Currently, virNetDevSetCoalesce() stub is always returning error. As
it's used by virNetDevTapCreateInBridgePort(), it essentially breaks
bridged networking if coalesce is not supported.

To make it work, relax the stub to trigger error only when its
coalesce argument is not NULL, otherwise report success.
---
 src/util/virnetdev.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/util/virnetdev.c b/src/util/virnetdev.c
index 131a56a8d..131c4d983 100644
--- a/src/util/virnetdev.c
+++ b/src/util/virnetdev.c
@@ -3155,8 +3155,11 @@ int virNetDevSetCoalesce(const char *ifname,
 }
 # else
 int virNetDevSetCoalesce(const char *ifname,
-                         virNetDevCoalescePtr coalesce ATTRIBUTE_UNUSED)
+                         virNetDevCoalescePtr coalesce)
 {
+    if (!coalesce)
+        return 0;
+
     virReportSystemError(ENOSYS,
                          _("Cannot set coalesce info on interface '%s'"),
                          ifname);
-- 
2.11.0