net: stmmac: introduce dma_recycle_rx_skbufs for stmmac_reinit_rx_buffers

Rearrange RX buffer page_pool recycling logics into dma_recycle_rx_skbufs,
so that we prepare stmmac_reinit_rx_buffers() for XSK pool expansion.
Signed-off-by: Ong Boon Leong <boon.leong.ong@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/stmicro/stmmac/stmmac_main.c

@@ -1513,19 +1513,14 @@ static int stmmac_alloc_rx_buffers(struct stmmac_priv *priv, u32 queue,
 }
 
 /**
- * stmmac_reinit_rx_buffers - reinit the RX descriptor buffer.
- * @priv: driver private structure
- * Description: this function is called to re-allocate a receive buffer, perform
- * the DMA mapping and init the descriptor.
+ * dma_recycle_rx_skbufs - recycle RX dma buffers
+ * @priv: private structure
+ * @queue: RX queue index
  */
-static void stmmac_reinit_rx_buffers(struct stmmac_priv *priv)
+static void dma_recycle_rx_skbufs(struct stmmac_priv *priv, u32 queue)
 {
-	u32 rx_count = priv->plat->rx_queues_to_use;
-	u32 queue;
-	int i;
-
-	for (queue = 0; queue < rx_count; queue++) {
 	struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
+	int i;
 
 	for (i = 0; i < priv->dma_rx_size; i++) {
 		struct stmmac_rx_buffer *buf = &rx_q->buf_pool[i];
@@ -1540,7 +1535,22 @@ static void stmmac_reinit_rx_buffers(struct stmmac_priv *priv)
 			buf->sec_page = NULL;
 		}
 	}
-	}
+}
+
+/**
+ * stmmac_reinit_rx_buffers - reinit the RX descriptor buffer.
+ * @priv: driver private structure
+ * Description: this function is called to re-allocate a receive buffer, perform
+ * the DMA mapping and init the descriptor.
+ */
+static void stmmac_reinit_rx_buffers(struct stmmac_priv *priv)
+{
+	u32 rx_count = priv->plat->rx_queues_to_use;
+	u32 queue;
+	int i;
+
+	for (queue = 0; queue < rx_count; queue++)
+		dma_recycle_rx_skbufs(priv, queue);
 
 	for (queue = 0; queue < rx_count; queue++) {
 		struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];