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, 6 deletions

diff --git a/drivers/net/skfp/skfddi.c b/drivers/net/skfp/skfddi.c
index 06ea2626c6f4..9733a11c6146 100644
--- a/drivers/net/skfp/skfddi.c
+++ b/drivers/net/skfp/skfddi.c
@@ -616,15 +616,10 @@ static int skfp_close(struct net_device *dev)
 
 irqreturn_t skfp_interrupt(int irq, void *dev_id)
 {
-        struct net_device *dev = (struct net_device *) dev_id;
+        struct net_device *dev = dev_id;
         struct s_smc *smc;      /* private board structure pointer */
         skfddi_priv *bp;
 
-        if (dev == NULL) {
-                printk("%s: irq %d for unknown device\n", dev->name, irq);
-                return IRQ_NONE;
-        }
-
         smc = netdev_priv(dev);
         bp = &smc->os;