Various drivers' irq handlers: kill dead code, needless casts

- Eliminate casts to/from void*

- Eliminate checks for conditions that never occur.  These typically
  fall into two classes:

	1) Checking for 'dev_id == NULL', then it is never called with
	NULL as an argument.

	2) Checking for invalid irq number, when the only caller (the
	system) guarantees the irq handler is called with the proper
	'irq' number argument.

Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 4 insertions, 4 deletions

diff --git a/drivers/scsi/NCR53c406a.c b/drivers/scsi/NCR53c406a.c
index 3896278594c7..d4613815f685 100644
--- a/drivers/scsi/NCR53c406a.c
+++ b/drivers/scsi/NCR53c406a.c
@@ -168,7 +168,7 @@ enum Phase {
 };
 
 /* Static function prototypes */
-static void NCR53c406a_intr(int, void *);
+static void NCR53c406a_intr(void *);
 static irqreturn_t do_NCR53c406a_intr(int, void *);
 static void chip_init(void);
 static void calc_port_addr(void);
@@ -685,7 +685,7 @@ static void wait_intr(void)
                 return;
         }
 
-        NCR53c406a_intr(0, NULL, NULL);
+        NCR53c406a_intr(NULL);
 }
 #endif
 
@@ -767,12 +767,12 @@ static irqreturn_t do_NCR53c406a_intr(int unused, void *dev_id)
         struct Scsi_Host *dev = dev_id;
 
         spin_lock_irqsave(dev->host_lock, flags);
-        NCR53c406a_intr(0, dev_id);
+        NCR53c406a_intr(dev_id);
         spin_unlock_irqrestore(dev->host_lock, flags);
         return IRQ_HANDLED;
 }
 
-static void NCR53c406a_intr(int unused, void *dev_id)
+static void NCR53c406a_intr(void *dev_id)
 {
         DEB(unsigned char fifo_size;
             )