PERFORCE change 128330 for review

[Tai-hwa Liang]

http://perforce.freebsd.org/chv.cgi?CH=128330

Change 128330 by avatar at avatar_t40 on 2007/10/30 12:07:46

	an_stats_update() should not go any further after the device is
	detached.  This fixes the card removal panic reported by user.
	
	Reported by:	dhw (http://lists.freebsd.org/pipermail/freebsd-current/2007-October/078937.html)
	Tested by:	dhw
	MFP4 after:	3 days

Affected files ...

.. //depot/projects/wifi/sys/dev/an/if_an.c#19 edit

Differences ...

==== //depot/projects/wifi/sys/dev/an/if_an.c#19 (text+ko) ====

@@ -1151,6 +1151,12 @@
 
 	sc = xsc;
 	AN_LOCK(sc);
+
+	if (sc->an_gone) {
+		AN_UNLOCK(sc);
+		return;
+	}
+
 	ifp = sc->an_ifp;
 
 	sc->an_status.an_type = AN_RID_STATUS;