gianfar: Move tbase/rbase initialization to gfar_init_mac()

For hibernation we want to call gfar_init_mac() without need to
free/allocate_skb_resources sequence, so save the DMA address into a
private struct, and move tbase/rbase initialization to gfar_init_mac().

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 8 insertions, 9 deletions

diff --git a/drivers/net/gianfar.c b/drivers/net/gianfar.c
index c8735540b1ec..068f9a2cf42c 100644
--- a/drivers/net/gianfar.c
+++ b/drivers/net/gianfar.c
@@ -151,17 +151,15 @@ static int gfar_alloc_skb_resources(struct net_device *ndev)
 {
         struct txbd8 *txbdp;
         struct rxbd8 *rxbdp;
-        dma_addr_t addr = 0;
         void *vaddr;
         int i;
         struct gfar_private *priv = netdev_priv(ndev);
         struct device *dev = &priv->ofdev->dev;
-        struct gfar __iomem *regs = priv->regs;
 
         /* Allocate memory for the buffer descriptors */
         vaddr = dma_alloc_coherent(dev, sizeof(*txbdp) * priv->tx_ring_size +
                                         sizeof(*rxbdp) * priv->rx_ring_size,
-                                   &addr, GFP_KERNEL);
+                                   &priv->tx_bd_dma_base, GFP_KERNEL);
         if (!vaddr) {
                 if (netif_msg_ifup(priv))
                         pr_err("%s: Could not allocate buffer descriptors!\n",
@@ -171,14 +169,9 @@ static int gfar_alloc_skb_resources(struct net_device *ndev)
 
         priv->tx_bd_base = vaddr;
 
-        /* enet DMA only understands physical addresses */
-        gfar_write(&regs->tbase0, addr);
-
         /* Start the rx descriptor ring where the tx ring leaves off */
-        addr = addr + sizeof(*txbdp) * priv->tx_ring_size;
         vaddr = vaddr + sizeof(*txbdp) * priv->tx_ring_size;
         priv->rx_bd_base = vaddr;
-        gfar_write(&regs->rbase0, addr);
 
         /* Setup the skbuff rings */
         priv->tx_skbuff = kmalloc(sizeof(*priv->tx_skbuff) *
@@ -256,6 +249,12 @@ static void gfar_init_mac(struct net_device *ndev)
         u32 tctrl = 0;
         u32 attrs = 0;
 
+        /* enet DMA only understands physical addresses */
+        gfar_write(&regs->tbase0, priv->tx_bd_dma_base);
+        gfar_write(&regs->rbase0, priv->tx_bd_dma_base +
+                                  sizeof(*priv->tx_bd_base) *
+                                  priv->tx_ring_size);
+
         /* Configure the coalescing support */
         gfar_write(&regs->txic, 0);
         if (priv->txcoalescing)
@@ -1060,7 +1059,7 @@ skip_rx_skbuff:
 
         dma_free_coherent(dev, sizeof(*txbdp) * priv->tx_ring_size +
                                sizeof(*rxbdp) * priv->rx_ring_size,
-                          priv->tx_bd_base, gfar_read(&priv->regs->tbase0));
+                          priv->tx_bd_base, priv->tx_bd_dma_base);
 }
 
 void gfar_start(struct net_device *dev)