svn commit: r307842 - head/sys/dev/hyperv/netvsc

[Sepherosa Ziehau]

Author: sephe
Date: Mon Oct 24 05:01:34 2016
New Revision: 307842
URL: https://svnweb.freebsd.org/changeset/base/307842

Log:
  hyperv/hn: Start link status check, if no network changes were pending.
  
  Link status check is much more lightweight than network change detection.
  
  MFC after:	1 week
  Sponsored by:	Microsoft
  Differential Revision:	https://reviews.freebsd.org/D8311

Modified:
  head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c

Modified: head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c
==============================================================================
--- head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c	Mon Oct 24 04:21:06 2016	(r307841)
+++ head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c	Mon Oct 24 05:01:34 2016	(r307842)
@@ -3908,12 +3908,18 @@ static void
 hn_resume_mgmt(struct hn_softc *sc)
 {
 
+	sc->hn_mgmt_taskq = sc->hn_mgmt_taskq0;
+
 	/*
-	 * Kick off network change detection, which will
-	 * do link status check too.
+	 * Kick off network change detection, if it was pending.
+	 * If no network change was pending, start link status
+	 * checks, which is more lightweight than network change
+	 * detection.
 	 */
-	sc->hn_mgmt_taskq = sc->hn_mgmt_taskq0;
-	hn_network_change(sc);
+	if (sc->hn_link_flags & HN_LINK_FLAG_NETCHG)
+		hn_network_change(sc);
+	else
+		hn_link_status_update(sc);
 }
 
 static void