ar71xx: ag71xx: compute the RX buffer size from the maximum frame size

[openwrt.git] / target / linux / ar71xx / files / drivers / net / ethernet / atheros / ag71xx / ag71xx_main.c

diff --git a/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c b/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c
index 281d0f5..622ffed 100644 (file)
--- a/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c
+++ b/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c
@@ -191,7 +191,7 @@ static void ag71xx_ring_rx_clean(struct ag71xx *ag)
        for (i = 0; i < ring->size; i++)
                if (ring->buf[i].rx_buf) {
                        dma_unmap_single(&ag->dev->dev, ring->buf[i].dma_addr,
-                                        AG71XX_RX_BUF_SIZE, DMA_FROM_DEVICE);
+                                        ag->rx_buf_size, DMA_FROM_DEVICE);
                        kfree(ring->buf[i].rx_buf);
                }
 }
@@ -217,15 +217,15 @@ static bool ag71xx_fill_rx_buf(struct ag71xx *ag, struct ag71xx_buf *buf,
 {
        void *data;
 
-       data = kmalloc(AG71XX_RX_BUF_SIZE +
+       data = kmalloc(ag->rx_buf_size +
                       SKB_DATA_ALIGN(sizeof(struct skb_shared_info)),
                       GFP_ATOMIC);
        if (!data)
                return false;
 
        buf->rx_buf = data;
-       buf->dma_addr = dma_map_single(&ag->dev->dev, data,
-                                      AG71XX_RX_BUF_SIZE, DMA_FROM_DEVICE);
+       buf->dma_addr = dma_map_single(&ag->dev->dev, data, ag->rx_buf_size,
+                                      DMA_FROM_DEVICE);
        buf->desc->data = (u32) buf->dma_addr + offset;
        return true;
 }
@@ -609,6 +609,8 @@ static int ag71xx_open(struct net_device *dev)
        struct ag71xx *ag = netdev_priv(dev);
        int ret;
 
+       ag->rx_buf_size = ag->max_frame_len + NET_SKB_PAD + NET_IP_ALIGN;
+
        ret = ag71xx_rings_init(ag);
        if (ret)
                goto err;
@@ -890,7 +892,7 @@ static int ag71xx_rx_packets(struct ag71xx *ag, int limit)
                pktlen -= ETH_FCS_LEN;
 
                dma_unmap_single(&dev->dev, ring->buf[i].dma_addr,
-                                AG71XX_RX_BUF_SIZE, DMA_FROM_DEVICE);
+                                ag->rx_buf_size, DMA_FROM_DEVICE);
 
                dev->stats.rx_packets++;
                dev->stats.rx_bytes += pktlen;