net: sh-eth: Remove definition of RX_DESC_SIZE and TX_DESC_SIZE

RX_DESC_SIZE and TX_DESC_SIZE mean the size of the data descriptor for sh-eth.
We can acquire this in sizeof. It is not necessary to define these in define.

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>

drivers/net/sh_eth.c

@@ -186,19 +186,21 @@ static int sh_eth_tx_desc_init(struct sh_eth_dev *eth)
 	struct tx_desc_s *cur_tx_desc;
 
 	/*
-	 * Allocate tx descriptors. They must be TX_DESC_SIZE bytes aligned
+	 * Allocate rx descriptors. They must be aligned to size of struct
+	 * tx_desc_s.
 	 */
 	port_info->tx_desc_malloc = malloc(NUM_TX_DESC *
 						 sizeof(struct tx_desc_s) +
-						 TX_DESC_SIZE - 1);
+						 sizeof(struct tx_desc_s) - 1);
 	if (!port_info->tx_desc_malloc) {
 		printf(SHETHER_NAME ": malloc failed\n");
 		ret = -ENOMEM;
 		goto err;
 	}
 
-	tmp_addr = (u32) (((int)port_info->tx_desc_malloc + TX_DESC_SIZE - 1) &
-			  ~(TX_DESC_SIZE - 1));
+	tmp_addr = (u32) (((int)port_info->tx_desc_malloc +
+			  sizeof(struct tx_desc_s) - 1) &
+			  ~(sizeof(struct tx_desc_s) - 1));
 	flush_cache_wback(tmp_addr, NUM_TX_DESC * sizeof(struct tx_desc_s));
 	/* Make sure we use a P2 address (non-cacheable) */
 	port_info->tx_desc_base = (struct tx_desc_s *)ADDR_TO_P2(tmp_addr);
@@ -238,19 +240,21 @@ static int sh_eth_rx_desc_init(struct sh_eth_dev *eth)
 	u8 *rx_buf;
 
 	/*
-	 * Allocate rx descriptors. They must be RX_DESC_SIZE bytes aligned
+	 * Allocate rx descriptors. They must be aligned to size of struct
+	 * rx_desc_s.
 	 */
 	port_info->rx_desc_malloc = malloc(NUM_RX_DESC *
 						 sizeof(struct rx_desc_s) +
-						 RX_DESC_SIZE - 1);
+						 sizeof(struct rx_desc_s) - 1);
 	if (!port_info->rx_desc_malloc) {
 		printf(SHETHER_NAME ": malloc failed\n");
 		ret = -ENOMEM;
 		goto err;
 	}
 
-	tmp_addr = (u32) (((int)port_info->rx_desc_malloc + RX_DESC_SIZE - 1) &
-			  ~(RX_DESC_SIZE - 1));
+	tmp_addr = (u32) (((int)port_info->rx_desc_malloc +
+			  sizeof(struct rx_desc_s) - 1) &
+			  ~(sizeof(struct rx_desc_s) - 1));
 	flush_cache_wback(tmp_addr, NUM_RX_DESC * sizeof(struct rx_desc_s));
 	/* Make sure we use a P2 address (non-cacheable) */
 	port_info->rx_desc_base = (struct rx_desc_s *)ADDR_TO_P2(tmp_addr);

drivers/net/sh_eth.h

@@ -51,8 +51,6 @@
 /* The size of the tx descriptor is determined by how much padding is used.
    4, 20, or 52 bytes of padding can be used */
 #define TX_DESC_PADDING	(CONFIG_SH_ETHER_ALIGNE_SIZE - 12)
-/* same as CONFIG_SH_ETHER_ALIGNE_SIZE */
-#define TX_DESC_SIZE	(12 + TX_DESC_PADDING)
 
 /* Tx descriptor. We always use 3 bytes of padding */
 struct tx_desc_s {
@@ -68,8 +66,6 @@ struct tx_desc_s {
 /* The size of the rx descriptor is determined by how much padding is used.
    4, 20, or 52 bytes of padding can be used */
 #define RX_DESC_PADDING	(CONFIG_SH_ETHER_ALIGNE_SIZE - 12)
-/* same as CONFIG_SH_ETHER_ALIGNE_SIZE */
-#define RX_DESC_SIZE		(12 + RX_DESC_PADDING)
 /* aligned cache line size */
 #define RX_BUF_ALIGNE_SIZE	(CONFIG_SH_ETHER_ALIGNE_SIZE > 32 ? 64 : 32)