net: macb: rename rx_skbuff into rx_buff

This is a preparation commit as the field in later patches will no
longer accomomdate skbuffs, but more generic frames.

Signed-off-by: Paolo Valerio <pvalerio@redhat.com>

Author: vlrpl

drivers/net/ethernet/cadence/macb.h

@@ -1301,7 +1301,7 @@ struct macb_queue {
 	unsigned int		rx_tail;
 	unsigned int		rx_prepared_head;
 	struct macb_dma_desc	*rx_ring;
-	struct sk_buff		**rx_skbuff;
+	void			**rx_buff;
 	void			*rx_buffers;
 	struct napi_struct	napi_rx;
 	struct queue_stats stats;

drivers/net/ethernet/cadence/macb_main.c

@@ -1442,7 +1442,7 @@ static int gem_rx_refill(struct macb_queue *queue)
 
 		desc = macb_rx_desc(queue, entry);
 
-		if (!queue->rx_skbuff[entry]) {
+		if (!queue->rx_buff[entry]) {
 			/* allocate sk_buff for this free entry in ring */
 			skb = netdev_alloc_skb(bp->dev, bp->rx_buffer_size);
 			if (unlikely(!skb)) {
@@ -1461,7 +1461,7 @@ static int gem_rx_refill(struct macb_queue *queue)
 				break;
 			}
 
-			queue->rx_skbuff[entry] = skb;
+			queue->rx_buff[entry] = skb;
 
 			if (entry == bp->rx_ring_size - 1)
 				paddr |= MACB_BIT(RX_WRAP);
@@ -1553,7 +1553,7 @@ static int gem_rx(struct macb_queue *queue, struct napi_struct *napi,
 			queue->stats.rx_dropped++;
 			break;
 		}
-		skb = queue->rx_skbuff[entry];
+		skb = queue->rx_buff[entry];
 		if (unlikely(!skb)) {
 			netdev_err(bp->dev,
 				   "inconsistent Rx descriptor chain\n");
@@ -1562,7 +1562,7 @@ static int gem_rx(struct macb_queue *queue, struct napi_struct *napi,
 			break;
 		}
 		/* now everything is ready for receiving packet */
-		queue->rx_skbuff[entry] = NULL;
+		queue->rx_buff[entry] = NULL;
 		len = ctrl & bp->rx_frm_len_mask;
 
 		netdev_vdbg(bp->dev, "gem_rx %u (len %u)\n", entry, len);
@@ -2581,11 +2581,11 @@ static void gem_free_rx_buffers(struct macb *bp)
 	int i;
 
 	for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) {
-		if (!queue->rx_skbuff)
+		if (!queue->rx_buff)
 			continue;
 
 		for (i = 0; i < bp->rx_ring_size; i++) {
-			skb = queue->rx_skbuff[i];
+			skb = queue->rx_buff[i];
 
 			if (!skb)
 				continue;
@@ -2599,8 +2599,8 @@ static void gem_free_rx_buffers(struct macb *bp)
 			skb = NULL;
 		}
 
-		kfree(queue->rx_skbuff);
-		queue->rx_skbuff = NULL;
+		kfree(queue->rx_buff);
+		queue->rx_buff = NULL;
 	}
 }
 
@@ -2663,13 +2663,13 @@ static int gem_alloc_rx_buffers(struct macb *bp)
 
 	for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) {
 		size = bp->rx_ring_size * sizeof(struct sk_buff *);
-		queue->rx_skbuff = kzalloc(size, GFP_KERNEL);
-		if (!queue->rx_skbuff)
+		queue->rx_buff = kzalloc(size, GFP_KERNEL);
+		if (!queue->rx_buff)
 			return -ENOMEM;
 		else
 			netdev_dbg(bp->dev,
-				   "Allocated %d RX struct sk_buff entries at %p\n",
-				   bp->rx_ring_size, queue->rx_skbuff);
+				   "Allocated %d RX buff entries at %p\n",
+				   bp->rx_ring_size, queue->rx_buff);
 	}
 	return 0;
 }