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, 6 deletions

diff --git a/drivers/net/irda/irport.c b/drivers/net/irda/irport.c
index 6ea78ececca7..654a68b490ae 100644
--- a/drivers/net/irda/irport.c
+++ b/drivers/net/irda/irport.c
@@ -766,18 +766,14 @@ static inline void irport_receive(struct irport_cb *self)
  */
 static irqreturn_t irport_interrupt(int irq, void *dev_id) 
 {
-        struct net_device *dev = (struct net_device *) dev_id;
+        struct net_device *dev = dev_id;
         struct irport_cb *self;
         int boguscount = 0;
         int iobase;
         int iir, lsr;
         int handled = 0;
 
-        if (!dev) {
-                IRDA_WARNING("%s() irq %d for unknown device.\n", __FUNCTION__, irq);
-                return IRQ_NONE;
-        }
-        self = (struct irport_cb *) dev->priv;
+        self = dev->priv;
 
         spin_lock(&self->lock);