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/plip.c b/drivers/net/plip.c
index c0b333d2917a..71afb274498f 100644
--- a/drivers/net/plip.c
+++ b/drivers/net/plip.c
@@ -909,11 +909,6 @@ plip_interrupt(int irq, void *dev_id)
         struct plip_local *rcv;
         unsigned char c0;
 
-        if (dev == NULL) {
-                printk(KERN_DEBUG "plip_interrupt: irq %d for unknown device.\n", irq);
-                return;
-        }
-
         nl = netdev_priv(dev);
         rcv = &nl->rcv_data;