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/lance.c b/drivers/net/lance.c
index 7afac47e59ad..6efbd499d752 100644
--- a/drivers/net/lance.c
+++ b/drivers/net/lance.c
@@ -1019,11 +1019,6 @@ static irqreturn_t lance_interrupt(int irq, void *dev_id)
         int csr0, ioaddr, boguscnt=10;
         int must_restart;
 
-        if (dev == NULL) {
-                printk ("lance_interrupt(): irq %d for unknown device.\n", irq);
-                return IRQ_NONE;
-        }
-
         ioaddr = dev->base_addr;
         lp = dev->priv;