commit 0d196a9dcab2e4eb0bce49b63c971d1e06cd9300
Author: Doug Ledford <dledford@redhat.com>
Date:   Wed Mar 17 09:28:07 2010 -0400

    Only signal a udev change event if we actually write a mapfile in RebuildMap
    
    Signed-off-by: Doug Ledford <dledford@redhat.com>

diff --git a/mapfile.c b/mapfile.c
index eed17c8..950cf62 100644
--- a/mapfile.c
+++ b/mapfile.c
@@ -472,12 +472,14 @@ void RebuildMap(void)
 		}
 		sysfs_free(sra);
 	}
-	map_write(map);
+	/* Only trigger a change if we wrote a new map file */
+	if (map_write(map))
+		for (md = mdstat ; md ; md = md->next) {
+			struct mdinfo *sra = sysfs_read(-1, md->devnum,
+							GET_VERSION);
+			sysfs_uevent(sra, "change");
+			sysfs_free(sra);
+		}
 	map_free(map);
-	for (md = mdstat ; md ; md = md->next) {
-		struct mdinfo *sra = sysfs_read(-1, md->devnum, GET_VERSION);
-		sysfs_uevent(sra, "change");
-		sysfs_free(sra);
-	}
 	free_mdstat(mdstat);
 }