znet: Don't claim DMA lock around free_dma() calls.

It's not necessary and it's illegal too.

Reported-by: Alexander Strakh <strakh@ispras.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/znet.c b/drivers/net/znet.c
index a0384b6..b423473 100644 (file)
--- a/drivers/net/znet.c
+++ b/drivers/net/znet.c
@@ -169,7 +169,6 @@ static void znet_tx_timeout (struct net_device *dev);
 static int znet_request_resources (struct net_device *dev)
 {
        struct znet_private *znet = netdev_priv(dev);
-       unsigned long flags;
 
        if (request_irq (dev->irq, &znet_interrupt, 0, "ZNet", dev))
                goto failed;
@@ -187,13 +186,9 @@ static int znet_request_resources (struct net_device *dev)
  free_sia:
        release_region (znet->sia_base, znet->sia_size);
  free_tx_dma:
-       flags = claim_dma_lock();
        free_dma (znet->tx_dma);
-       release_dma_lock (flags);
  free_rx_dma:
-       flags = claim_dma_lock();
        free_dma (znet->rx_dma);
-       release_dma_lock (flags);
  free_irq:
        free_irq (dev->irq, dev);
  failed:
@@ -203,14 +198,11 @@ static int znet_request_resources (struct net_device *dev)
 static void znet_release_resources (struct net_device *dev)
 {
        struct znet_private *znet = netdev_priv(dev);
-       unsigned long flags;
 
        release_region (znet->sia_base, znet->sia_size);
        release_region (dev->base_addr, znet->io_size);
-       flags = claim_dma_lock();
        free_dma (znet->tx_dma);
        free_dma (znet->rx_dma);
-       release_dma_lock (flags);
        free_irq (dev->irq, dev);
 }