svn commit: r291911 - head/sys/dev/iscsi

[Steven Hartland]

Author: smh
Date: Mon Dec  7 02:56:08 2015
New Revision: 291911
URL: https://svnweb.freebsd.org/changeset/base/291911

Log:
  Fix panic on shutdown due to iscsi event priority
  
  iscsi's shutdown_pre_sync prio was SHUTDOWN_PRI_FIRST which caused it to
  run before other high priority handlers such as filesystems e.g. ZFS.
  
  This meant the iscsi sessions where removed before the ZFS geom consumer
  was closed, resulting in a panic from g_access calls on debug kernels
  due to negative acr.
  
  Instead use the same as the old iscsi_initiator SHUTDOWN_PRI_DEFAULT-1
  which allows it to run before dashutdown etc but after filesystems.
  
  MFC after:	2 weeks
  Sponsored by:	Multiplay

Modified:
  head/sys/dev/iscsi/iscsi.c

Modified: head/sys/dev/iscsi/iscsi.c
==============================================================================
--- head/sys/dev/iscsi/iscsi.c	Sun Dec  6 21:31:09 2015	(r291910)
+++ head/sys/dev/iscsi/iscsi.c	Mon Dec  7 02:56:08 2015	(r291911)
@@ -2365,7 +2365,7 @@ iscsi_load(void)
 	sc->sc_cdev->si_drv1 = sc;
 
 	sc->sc_shutdown_eh = EVENTHANDLER_REGISTER(shutdown_pre_sync,
-	    iscsi_shutdown, sc, SHUTDOWN_PRI_FIRST);
+	    iscsi_shutdown, sc, SHUTDOWN_PRI_DEFAULT-1);
 
 	return (0);
 }