sky2: Create buffer alloc and free helpers

Refactor similar two sections of code that free buffers into one.
Only call tx_init if all buffer allocations succeed.
Signed-off-by: Mike McCormack <mikem@ring3k.org>
Acked-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/sky2.c

@@ -1405,6 +1405,61 @@ static int sky2_rx_start(struct sky2_port *sky2)
 	return -ENOMEM;
 }
 
+static int sky2_alloc_buffers(struct sky2_port *sky2)
+{
+	struct sky2_hw *hw = sky2->hw;
+
+	/* must be power of 2 */
+	sky2->tx_le = pci_alloc_consistent(hw->pdev,
+					   sky2->tx_ring_size *
+					   sizeof(struct sky2_tx_le),
+					   &sky2->tx_le_map);
+	if (!sky2->tx_le)
+		goto nomem;
+
+	sky2->tx_ring = kcalloc(sky2->tx_ring_size, sizeof(struct tx_ring_info),
+				GFP_KERNEL);
+	if (!sky2->tx_ring)
+		goto nomem;
+
+	sky2->rx_le = pci_alloc_consistent(hw->pdev, RX_LE_BYTES,
+					   &sky2->rx_le_map);
+	if (!sky2->rx_le)
+		goto nomem;
+	memset(sky2->rx_le, 0, RX_LE_BYTES);
+
+	sky2->rx_ring = kcalloc(sky2->rx_pending, sizeof(struct rx_ring_info),
+				GFP_KERNEL);
+	if (!sky2->rx_ring)
+		goto nomem;
+
+	return 0;
+nomem:
+	return -ENOMEM;
+}
+
+static void sky2_free_buffers(struct sky2_port *sky2)
+{
+	struct sky2_hw *hw = sky2->hw;
+
+	if (sky2->rx_le) {
+		pci_free_consistent(hw->pdev, RX_LE_BYTES,
+				    sky2->rx_le, sky2->rx_le_map);
+		sky2->rx_le = NULL;
+	}
+	if (sky2->tx_le) {
+		pci_free_consistent(hw->pdev,
+				    sky2->tx_ring_size * sizeof(struct sky2_tx_le),
+				    sky2->tx_le, sky2->tx_le_map);
+		sky2->tx_le = NULL;
+	}
+	kfree(sky2->tx_ring);
+	kfree(sky2->rx_ring);
+
+	sky2->tx_ring = NULL;
+	sky2->rx_ring = NULL;
+}
+
 /* Bring up network interface. */
 static int sky2_up(struct net_device *dev)
 {
@@ -1412,7 +1467,7 @@ static int sky2_up(struct net_device *dev)
 	struct sky2_hw *hw = sky2->hw;
 	unsigned port = sky2->port;
 	u32 imask, ramsize;
-	int cap, err = -ENOMEM;
+	int cap, err;
 	struct net_device *otherdev = hw->dev[sky2->port^1];
 
 	/*
@@ -1431,32 +1486,12 @@ static int sky2_up(struct net_device *dev)
 
 	netif_carrier_off(dev);
 
-	/* must be power of 2 */
-	sky2->tx_le = pci_alloc_consistent(hw->pdev,
-					   sky2->tx_ring_size *
-					   sizeof(struct sky2_tx_le),
-					   &sky2->tx_le_map);
-	if (!sky2->tx_le)
-		goto err_out;
-
-	sky2->tx_ring = kcalloc(sky2->tx_ring_size, sizeof(struct tx_ring_info),
-				GFP_KERNEL);
-	if (!sky2->tx_ring)
+	err = sky2_alloc_buffers(sky2);
+	if (err)
 		goto err_out;
 
 	tx_init(sky2);
 
-	sky2->rx_le = pci_alloc_consistent(hw->pdev, RX_LE_BYTES,
-					   &sky2->rx_le_map);
-	if (!sky2->rx_le)
-		goto err_out;
-	memset(sky2->rx_le, 0, RX_LE_BYTES);
-
-	sky2->rx_ring = kcalloc(sky2->rx_pending, sizeof(struct rx_ring_info),
-				GFP_KERNEL);
-	if (!sky2->rx_ring)
-		goto err_out;
-
 	sky2_mac_init(hw, port);
 
 	/* Register is number of 4K blocks on internal RAM buffer. */
@@ -1513,22 +1548,7 @@ static int sky2_up(struct net_device *dev)
 	return 0;
 
 err_out:
-	if (sky2->rx_le) {
-		pci_free_consistent(hw->pdev, RX_LE_BYTES,
-				    sky2->rx_le, sky2->rx_le_map);
-		sky2->rx_le = NULL;
-	}
-	if (sky2->tx_le) {
-		pci_free_consistent(hw->pdev,
-				    sky2->tx_ring_size * sizeof(struct sky2_tx_le),
-				    sky2->tx_le, sky2->tx_le_map);
-		sky2->tx_le = NULL;
-	}
-	kfree(sky2->tx_ring);
-	kfree(sky2->rx_ring);
-
-	sky2->tx_ring = NULL;
-	sky2->rx_ring = NULL;
+	sky2_free_buffers(sky2);
 	return err;
 }
 
@@ -1880,20 +1900,7 @@ static int sky2_down(struct net_device *dev)
 
 	sky2_rx_clean(sky2);
 
-	pci_free_consistent(hw->pdev, RX_LE_BYTES,
-			    sky2->rx_le, sky2->rx_le_map);
-	kfree(sky2->rx_ring);
-
-	pci_free_consistent(hw->pdev,
-			    sky2->tx_ring_size * sizeof(struct sky2_tx_le),
-			    sky2->tx_le, sky2->tx_le_map);
-	kfree(sky2->tx_ring);
-
-	sky2->tx_le = NULL;
-	sky2->rx_le = NULL;
-
-	sky2->rx_ring = NULL;
-	sky2->tx_ring = NULL;
+	sky2_free_buffers(sky2);
 
 	return 0;
 }