RDMA/rtrs-clt: Use bitmap_empty()

Use bitmap_empty() instead of hand-writing them.

Link: https://lore.kernel.org/r/b71ccfaf4a47dee8e1ad373604c861479d499b6b.1657298747.git.christophe.jaillet@wanadoo.frSigned-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Acked-by: Jack Wang <jinpu.wang@ionos.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>

drivers/infiniband/ulp/rtrs/rtrs-clt.c

@@ -1433,12 +1433,10 @@ static int alloc_permits(struct rtrs_clt_sess *clt)
 
 static void free_permits(struct rtrs_clt_sess *clt)
 {
-	if (clt->permits_map) {
-		size_t sz = clt->queue_depth;
-
+	if (clt->permits_map)
 		wait_event(clt->permits_wait,
-			   find_first_bit(clt->permits_map, sz) >= sz);
-	}
+			   bitmap_empty(clt->permits_map, clt->queue_depth));
+
 	bitmap_free(clt->permits_map);
 	clt->permits_map = NULL;
 	kfree(clt->permits);