svn commit: r249161 - head/sys/geom

[Alexander Motin]

Author: mav
Date: Fri Apr  5 13:11:28 2013
New Revision: 249161
URL: http://svnweb.freebsd.org/changeset/base/249161

Log:
  Following r241022, replace iteration over the provider list on media events
  by taking first one and asserting that there is no others.
  
  MFC after:	1 week

Modified:
  head/sys/geom/geom_disk.c

Modified: head/sys/geom/geom_disk.c
==============================================================================
--- head/sys/geom/geom_disk.c	Fri Apr  5 11:57:41 2013	(r249160)
+++ head/sys/geom/geom_disk.c	Fri Apr  5 13:11:28 2013	(r249161)
@@ -658,8 +658,12 @@ disk_media_changed(struct disk *dp, int 
 
 	gp = dp->d_geom;
 	if (gp != NULL) {
-		LIST_FOREACH(pp, &gp->provider, provider)
+		pp = LIST_FIRST(&gp->provider);
+		if (pp != NULL) {
+			KASSERT(LIST_NEXT(pp, provider) == NULL,
+			    ("geom %p has more than one provider", gp));
 			g_media_changed(pp, flag);
+		}
 	}
 }
 
@@ -671,8 +675,12 @@ disk_media_gone(struct disk *dp, int fla
 
 	gp = dp->d_geom;
 	if (gp != NULL) {
-		LIST_FOREACH(pp, &gp->provider, provider)
+		pp = LIST_FIRST(&gp->provider);
+		if (pp != NULL) {
+			KASSERT(LIST_NEXT(pp, provider) == NULL,
+			    ("geom %p has more than one provider", gp));
 			g_media_gone(pp, flag);
+		}
 	}
 }