IB/mlx5: Fix wrong use of kfree at bad flow in create_cq_user

The kfree was called to free cqb, while it should free *cqb.

Fixes: 1cbe6fc86ccf ("IB/mlx5: Add support for CQE compressing")
Signed-off-by: Bodong Wang <bodong@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/hw/mlx5/cq.c

@@ -818,7 +818,7 @@ static int create_cq_user(struct mlx5_ib_dev *dev, struct ib_udata *udata,
 	return 0;
 
 err_cqb:
-	kfree(cqb);
+	kfree(*cqb);
 
 err_db:
 	mlx5_ib_db_unmap_user(to_mucontext(context), &cq->db);