dm raid: use rs->raid_disks to avoid memory leaks on free

Also makes code more consistent throughout.
Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>

drivers/md/dm-raid.c

@@ -717,7 +717,7 @@ static void raid_set_free(struct raid_set *rs)
 {
 	int i;
 
-	for (i = 0; i < rs->md.raid_disks; i++) {
+	for (i = 0; i < rs->raid_disks; i++) {
 		if (rs->dev[i].meta_dev)
 			dm_put_device(rs->ti, rs->dev[i].meta_dev);
 		md_rdev_clear(&rs->dev[i].rdev);
@@ -757,7 +757,7 @@ static int parse_dev_params(struct raid_set *rs, struct dm_arg_set *as)
 	if (!arg)
 		return -EINVAL;
 
-	for (i = 0; i < rs->md.raid_disks; i++) {
+	for (i = 0; i < rs->raid_disks; i++) {
 		rs->dev[i].rdev.raid_disk = i;
 
 		rs->dev[i].meta_dev = NULL;
@@ -961,7 +961,7 @@ static int validate_raid_redundancy(struct raid_set *rs)
 		 *	    C	 D    D	   E	E
 		 */
 		if (__is_raid10_near(rs->md.new_layout)) {
-			for (i = 0; i < rs->raid_disks; i++) {
+			for (i = 0; i < rs->md.raid_disks; i++) {
 				if (!(i % copies))
 					rebuilds_per_group = 0;
 				if ((!rs->dev[i].rdev.sb_page ||
@@ -1085,7 +1085,7 @@ static int parse_raid_params(struct raid_set *rs, struct dm_arg_set *as,
 	 * What is found in the superblocks of the devices is always
 	 * authoritative, unless 'rebuild' or '[no]sync' was specified.
 	 */
-	for (i = 0; i < rs->md.raid_disks; i++) {
+	for (i = 0; i < rs->raid_disks; i++) {
 		set_bit(In_sync, &rs->dev[i].rdev.flags);
 		rs->dev[i].rdev.recovery_offset = MaxSector;
 	}
@@ -2714,7 +2714,7 @@ static void configure_discard_support(struct raid_set *rs)
 	/* RAID level 4,5,6 require discard_zeroes_data for data integrity! */
 	raid456 = (rs->md.level == 4 || rs->md.level == 5 || rs->md.level == 6);
 
-	for (i = 0; i < rs->md.raid_disks; i++) {
+	for (i = 0; i < rs->raid_disks; i++) {
 		struct request_queue *q;
 
 		if (!rs->dev[i].rdev.bdev)
@@ -3186,7 +3186,6 @@ static void raid_status(struct dm_target *ti, status_type_t type,
 		sync_action = decipher_sync_action(&rs->md);
 
 		/* HM FIXME: do we want another state char for raid0? It shows 'D' or 'A' now */
-		rdev_for_each(rdev, mddev)
 		for (i = 0; i < rs->raid_disks; i++)
 			DMEMIT(__raid_dev_status(&rs->dev[i].rdev, array_in_sync));