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>

2 files changed, 4 insertions, 5 deletions

diff --git a/drivers/pcmcia/at91_cf.c b/drivers/pcmcia/at91_cf.c
index 991e084db2d6..7f5df9a9f393 100644
--- a/drivers/pcmcia/at91_cf.c
+++ b/drivers/pcmcia/at91_cf.c
@@ -66,7 +66,7 @@ static int at91_cf_ss_init(struct pcmcia_socket *s)
 
 static irqreturn_t at91_cf_irq(int irq, void *_cf)
 {
-        struct at91_cf_socket   *cf = (struct at91_cf_socket *) _cf;
+        struct at91_cf_socket *cf = _cf;
 
         if (irq == cf->board->det_pin) {
                 unsigned present = at91_cf_present(cf);
diff --git a/drivers/pcmcia/hd64465_ss.c b/drivers/pcmcia/hd64465_ss.c
index db3c26b5de14..caca0dc9d30f 100644
--- a/drivers/pcmcia/hd64465_ss.c
+++ b/drivers/pcmcia/hd64465_ss.c
@@ -650,7 +650,7 @@ static int hs_set_mem_map(struct pcmcia_socket *s, struct pccard_mem_map *mem)
  */
 static int hs_irq_demux(int irq, void *dev)
 {
-        hs_socket_t *sp = (hs_socket_t *)dev;
+        hs_socket_t *sp = dev;
         u_int cscr;
         
         DPRINTK("hs_irq_demux(irq=%d)\n", irq);
@@ -673,11 +673,10 @@ static int hs_irq_demux(int irq, void *dev)
  
 static irqreturn_t hs_interrupt(int irq, void *dev)
 {
-        hs_socket_t *sp = (hs_socket_t *)dev;
+        hs_socket_t *sp = dev;
         u_int events = 0;
         u_int cscr;
-        
-        
+
         cscr = hs_in(sp, CSCR);
         
         DPRINTK("hs_interrupt, cscr=%04x\n", cscr);