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/es1371.c b/sound/oss/es1371.c
index 2562f4769b90..ddf6b0a0bca5 100644
--- a/sound/oss/es1371.c
+++ b/sound/oss/es1371.c
@@ -1102,7 +1102,7 @@ static void es1371_handle_midi(struct es1371_state *s)
 
 static irqreturn_t es1371_interrupt(int irq, void *dev_id)
 {
-        struct es1371_state *s = (struct es1371_state *)dev_id;
+        struct es1371_state *s = dev_id;
         unsigned int intsrc, sctl;
         
         /* fastpath out, to ease interrupt sharing */