s390/scm_blk: fix memleak in init function

If the allocation of a single request fails the already allocated
requests will not be freed.

Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

drivers/s390/block/scm_blk.c

@@ -465,7 +465,7 @@ static int __init scm_blk_init(void)
 	scm_major = ret;
 	ret = scm_alloc_rqs(nr_requests);
 	if (ret)
-		goto out_unreg;
+		goto out_free;
 
 	scm_debug = debug_register("scm_log", 16, 1, 16);
 	if (!scm_debug) {
@@ -486,7 +486,6 @@ out_dbf:
 	debug_unregister(scm_debug);
 out_free:
 	scm_free_rqs();
-out_unreg:
 	unregister_blkdev(scm_major, "scm");
 out:
 	return ret;