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/sound/oss/i810_audio.c b/sound/oss/i810_audio.c
index a48af879b466..240cc7939b69 100644
--- a/sound/oss/i810_audio.c
+++ b/sound/oss/i810_audio.c
@@ -1525,7 +1525,7 @@ static void i810_channel_interrupt(struct i810_card *card)
 
 static irqreturn_t i810_interrupt(int irq, void *dev_id)
 {
-        struct i810_card *card = (struct i810_card *)dev_id;
+        struct i810_card *card = dev_id;
         u32 status;
 
         spin_lock(&card->lock);