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, 8 deletions

diff --git a/drivers/net/irda/ali-ircc.c b/drivers/net/irda/ali-ircc.c
index 971e2dee1e6b..cebf8c374bc5 100644
--- a/drivers/net/irda/ali-ircc.c
+++ b/drivers/net/irda/ali-ircc.c
@@ -662,19 +662,13 @@ static int ali_ircc_read_dongle_id (int i, chipio_t *info)
  */
 static irqreturn_t ali_ircc_interrupt(int irq, void *dev_id)
 {
-        struct net_device *dev = (struct net_device *) dev_id;
+        struct net_device *dev = dev_id;
         struct ali_ircc_cb *self;
         int ret;
                 
         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
                 
-        if (!dev) {
-                IRDA_WARNING("%s: irq %d for unknown device.\n",
-                             ALI_IRCC_DRIVER_NAME, irq);
-                return IRQ_NONE;
-        }       
-        
-        self = (struct ali_ircc_cb *) dev->priv;
+        self = dev->priv;
         
         spin_lock(&self->lock);