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/tokenring/tms380tr.c b/drivers/net/tokenring/tms380tr.c
index c0ab6e44eb1f..ea797ca2b988 100644
--- a/drivers/net/tokenring/tms380tr.c
+++ b/drivers/net/tokenring/tms380tr.c
@@ -751,11 +751,6 @@ irqreturn_t tms380tr_interrupt(int irq, void *dev_id)
         unsigned short irq_type;
         int handled = 0;
 
-        if(dev == NULL) {
-                printk(KERN_INFO "%s: irq %d for unknown device.\n", dev->name, irq);
-                return IRQ_NONE;
-        }
-
         tp = netdev_priv(dev);
 
         irq_type = SIFREADW(SIFSTS);