r6040: fix ifconfig down and freeing of tx/rx descriptors

This patch fixes warnings and such traces that appear when doing
an ifconfig down on the interface:

WARNING: at arch/x86/kernel/pci-dma.c:376 dma_free_coherent+0x40/0x7d()
Modules linked in:

Signed-off-by: Joe Chou <joe.chou@rdc.com.tw>
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/r6040.c b/drivers/net/r6040.c
index cf3a082bc89d6e1df9c68c80e1e08c24f774cf39..b59837e80750bb351ee4be0d7b11c04c47b29b62 100644 (file)
--- a/drivers/net/r6040.c
+++ b/drivers/net/r6040.c
@@ -457,22 +457,12 @@ static void r6040_down(struct net_device *dev)
        iowrite16(adrp[0], ioaddr + MID_0L);
        iowrite16(adrp[1], ioaddr + MID_0M);
        iowrite16(adrp[2], ioaddr + MID_0H);
-       free_irq(dev->irq, dev);
-
-       /* Free RX buffer */
-       r6040_free_rxbufs(dev);
-
-       /* Free TX buffer */
-       r6040_free_txbufs(dev);
-
-       /* Free Descriptor memory */
-       pci_free_consistent(pdev, RX_DESC_SIZE, lp->rx_ring, lp->rx_ring_dma);
-       pci_free_consistent(pdev, TX_DESC_SIZE, lp->tx_ring, lp->tx_ring_dma);
 }
 
 static int r6040_close(struct net_device *dev)
 {
        struct r6040_private *lp = netdev_priv(dev);
+       struct pci_dev *pdev = lp->pdev;
 
        /* deleted timer */
        del_timer_sync(&lp->timer);
@@ -481,8 +471,28 @@ static int r6040_close(struct net_device *dev)
        napi_disable(&lp->napi);
        netif_stop_queue(dev);
        r6040_down(dev);
+
+       free_irq(dev->irq, dev);
+
+       /* Free RX buffer */
+       r6040_free_rxbufs(dev);
+
+       /* Free TX buffer */
+       r6040_free_txbufs(dev);
+
        spin_unlock_irq(&lp->lock);
 
+       /* Free Descriptor memory */
+       if (lp->rx_ring) {
+               pci_free_consistent(pdev, RX_DESC_SIZE, lp->rx_ring, lp->rx_ring_dma);
+               lp->rx_ring = 0;
+       }
+
+       if (lp->tx_ring) {
+               pci_free_consistent(pdev, TX_DESC_SIZE, lp->tx_ring, lp->tx_ring_dma);
+               lp->tx_ring = 0;
+       }
+
        return 0;
 }