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From: Marcin Wojtas <mw@FreeBSD.org>
Date: Sat, 15 Sep 2018 09:03:50 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r338692 - stable/11/sys/dev/ena
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Author: mw
Date: Sat Sep 15 09:03:50 2018
New Revision: 338692
URL: https://svnweb.freebsd.org/changeset/base/338692

Log:
  MFC r333454: Skip setting the MTU for ENA if it is not changing
  
  Sponsored by: Amazon, Inc.

Modified:
  stable/11/sys/dev/ena/ena.c
Directory Properties:
  stable/11/   (props changed)

Modified: stable/11/sys/dev/ena/ena.c
==============================================================================
--- stable/11/sys/dev/ena/ena.c	Fri Sep 14 23:21:52 2018	(r338691)
+++ stable/11/sys/dev/ena/ena.c	Sat Sep 15 09:03:50 2018	(r338692)
@@ -2302,6 +2302,8 @@ ena_ioctl(if_t ifp, u_long command, caddr_t data)
 	rc = 0;
 	switch (command) {
 	case SIOCSIFMTU:
+		if (ifp->if_mtu == ifr->ifr_mtu)
+			break;
 		sx_xlock(&adapter->ioctl_sx);
 		ena_down(adapter);