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, 2 insertions, 5 deletions

diff --git a/drivers/net/3c523.c b/drivers/net/3c523.c
index 1c97271112d0..91849469b4f4 100644
--- a/drivers/net/3c523.c
+++ b/drivers/net/3c523.c
@@ -902,14 +902,11 @@ static void *alloc_rfa(struct net_device *dev, void *ptr)
 static irqreturn_t
 elmc_interrupt(int irq, void *dev_id)
 {
-        struct net_device *dev = (struct net_device *) dev_id;
+        struct net_device *dev = dev_id;
         unsigned short stat;
         struct priv *p;
 
-        if (dev == NULL) {
-                printk(KERN_ERR "elmc-interrupt: irq %d for unknown device.\n", irq);
-                return IRQ_NONE;
-        } else if (!netif_running(dev)) {
+        if (!netif_running(dev)) {
                 /* The 3c523 has this habit of generating interrupts during the
                    reset.  I'm not sure if the ni52 has this same problem, but it's
                    really annoying if we haven't finished initializing it.  I was