drivers/net: eliminate irq handler impossible checks, needless casts

- Eliminate check for irq handler 'dev_id==NULL' where the
  condition never occurs.

- Eliminate needless casts to/from void*

Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 1 insertions, 5 deletions

diff --git a/drivers/net/atp.c b/drivers/net/atp.c
index 062f80e20874..2d306fcb7f36 100644
--- a/drivers/net/atp.c
+++ b/drivers/net/atp.c
@@ -598,17 +598,13 @@ static int atp_send_packet(struct sk_buff *skb, struct net_device *dev)
    Handle the network interface interrupts. */
 static irqreturn_t atp_interrupt(int irq, void *dev_instance)
 {
-        struct net_device *dev = (struct net_device *)dev_instance;
+        struct net_device *dev = dev_instance;
         struct net_local *lp;
         long ioaddr;
         static int num_tx_since_rx;
         int boguscount = max_interrupt_work;
         int handled = 0;
 
-        if (dev == NULL) {
-                printk(KERN_ERR "ATP_interrupt(): irq %d for unknown device.\n", irq);
-                return IRQ_NONE;
-        }
         ioaddr = dev->base_addr;
         lp = netdev_priv(dev);