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, 1 insertions, 1 deletions

diff --git a/drivers/serial/pxa.c b/drivers/serial/pxa.c
index 846089f222d4..415fe9633a9b 100644
--- a/drivers/serial/pxa.c
+++ b/drivers/serial/pxa.c
@@ -232,7 +232,7 @@ static inline void check_modem_status(struct uart_pxa_port *up)
  */
 static inline irqreturn_t serial_pxa_irq(int irq, void *dev_id)
 {
-	struct uart_pxa_port *up = (struct uart_pxa_port *)dev_id;
+	struct uart_pxa_port *up = dev_id;
 	unsigned int iir, lsr;
 
 	iir = serial_in(up, UART_IIR);