Report which device failed in a Fail message.

Signed-off-by: Neil Brown <neilb@suse.de>

ChangeLog

@@ -10,6 +10,8 @@ Changes Prior to this release
     -   Allow scanning of devices listed in /proc/partitions even
 	if they don't appear in /dev.
     -   Support --assume-clean in --create mode as well as --build
+    -   --monitor now reports which device failed in a 'Fail' message
+	   This broke with 2.6
 
 Changes Prior to 2.1 release
     -   Fix assembling of raid10 array when devices are missing.

Monitor.c

@@ -313,6 +313,9 @@ int Monitor(mddev_dev_t devlist,
 					case 'U': newstate = 6 /* ACTIVE/SYNC */; break;
 					case '_': newstate = 0; break;
 					}
+				if (dv == NULL && st->devid[i])
+					dv = map_dev(major(st->devid[i]),
+						     minor(st->devid[i]));
 				change = newstate ^ st->devstate[i];
 				if (st->utime && change && !st->err) {
 					if (i < (unsigned)array.raid_disks &&