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, 0 insertions, 5 deletions

diff --git a/drivers/net/3c527.c b/drivers/net/3c527.c
index d516c3225ca4..f4aca5386add 100644
--- a/drivers/net/3c527.c
+++ b/drivers/net/3c527.c
@@ -1324,11 +1324,6 @@ static irqreturn_t mc32_interrupt(int irq, void *dev_id)
         int rx_event = 0;
         int tx_event = 0;
 
-        if (dev == NULL) {
-                printk(KERN_WARNING "%s: irq %d for unknown device.\n", cardname, irq);
-                return IRQ_NONE;
-        }
-
         ioaddr = dev->base_addr;
         lp = netdev_priv(dev);