dl2k: nulify fraginfo after unmap

Patch fixes: "DMA-API: device driver tries to free an invalid DMA
memory address" warning reported here:
https://bugzilla.redhat.com/show_bug.cgi?id=639824

Reported-by: Frantisek Hanzlik <franta@hanzlici.cz>
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/dl2k.c b/drivers/net/dl2k.c
index e1a8216ff6926608759e9da69313c1d1958f4759..c05db6046050981360c7789859a12b953bafe20c 100644 (file)
--- a/drivers/net/dl2k.c
+++ b/drivers/net/dl2k.c
@@ -1753,8 +1753,6 @@ rio_close (struct net_device *dev)
 
        /* Free all the skbuffs in the queue. */
        for (i = 0; i < RX_RING_SIZE; i++) {
-               np->rx_ring[i].status = 0;
-               np->rx_ring[i].fraginfo = 0;
                skb = np->rx_skbuff[i];
                if (skb) {
                        pci_unmap_single(np->pdev,
@@ -1763,6 +1761,8 @@ rio_close (struct net_device *dev)
                        dev_kfree_skb (skb);
                        np->rx_skbuff[i] = NULL;
                }
+               np->rx_ring[i].status = 0;
+               np->rx_ring[i].fraginfo = 0;
        }
        for (i = 0; i < TX_RING_SIZE; i++) {
                skb = np->tx_skbuff[i];