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, 7 deletions

diff --git a/drivers/net/sb1000.c b/drivers/net/sb1000.c
index dc30dee5537f..b9fa4fbb1398 100644
--- a/drivers/net/sb1000.c
+++ b/drivers/net/sb1000.c
@@ -1084,19 +1084,13 @@ static irqreturn_t sb1000_interrupt(int irq, void *dev_id)
         char *name;
         unsigned char st;
         int ioaddr[2];
-        struct net_device *dev = (struct net_device *) dev_id;
+        struct net_device *dev = dev_id;
         struct sb1000_private *lp = netdev_priv(dev);
 
         const unsigned char Command0[6] = {0x80, 0x2c, 0x00, 0x00, 0x00, 0x00};
         const unsigned char Command1[6] = {0x80, 0x2e, 0x00, 0x00, 0x00, 0x00};
         const int MaxRxErrorCount = 6;
 
-        if (dev == NULL) {
-                printk(KERN_ERR "sb1000_interrupt(): irq %d for unknown device.\n",
-                        irq);
-                return IRQ_NONE;
-        }
-
         ioaddr[0] = dev->base_addr;
         /* mem_start holds the second I/O address */
         ioaddr[1] = dev->mem_start;