mlx4_en: Fix error handling while activating RX rings

In case of failure of either srq creation or page allocation,
the cleanup code handled the failed ring as well, and tried
to destroy resources that where not allocated.
Signed-off-by: Yevgeny Petrilin <yevgenyp@mellanox.co.il>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/mlx4/en_rx.c

@@ -436,8 +436,9 @@ int mlx4_en_activate_rx_rings(struct mlx4_en_priv *priv)
 		/* Initialize page allocators */
 		err = mlx4_en_init_allocator(priv, ring);
 		if (err) {
-			 mlx4_err(mdev, "Failed initializing ring allocator\n");
-			 goto err_allocator;
+			mlx4_err(mdev, "Failed initializing ring allocator\n");
+			ring_ind--;
+			goto err_allocator;
 		}
 
 		/* Fill Rx buffers */
@@ -467,6 +468,7 @@ int mlx4_en_activate_rx_rings(struct mlx4_en_priv *priv)
 				     ring->wqres.db.dma, &ring->srq);
 		if (err){
 			mlx4_err(mdev, "Failed to allocate srq\n");
+			ring_ind--;
 			goto err_srq;
 		}
 		ring->srq.event = mlx4_en_srq_event;