idr: fix idr_remove()

The return inside the loop makes us free only a single layer.

Signed-off-by: Nadia Derbey <[e-mail]>
Cc: "Paul E. McKenney" <[e-mail]>
Cc: Manfred Spraul <[e-mail]>
Cc: Jim Houston <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

lib/idr.c

···
 	while (idp->id_free_cnt >= IDR_FREE_MAX) {
 		p = alloc_layer(idp);
 		kmem_cache_free(idr_layer_cache, p);
-		return;
 	}
+	return;
 }
 EXPORT_SYMBOL(idr_remove);