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>
diff --git a/drivers/atm/ambassador.c b/drivers/atm/ambassador.c
index 8ff5c4e..323592d 100644
--- a/drivers/atm/ambassador.c
+++ b/drivers/atm/ambassador.c
@@ -862,15 +862,10 @@
/********** interrupt handling **********/
static irqreturn_t interrupt_handler(int irq, void *dev_id) {
- amb_dev * dev = (amb_dev *) dev_id;
+ amb_dev * dev = dev_id;
PRINTD (DBG_IRQ|DBG_FLOW, "interrupt_handler: %p", dev_id);
- if (!dev_id) {
- PRINTD (DBG_IRQ|DBG_ERR, "irq with NULL dev_id: %d", irq);
- return IRQ_NONE;
- }
-
{
u32 interrupt = rd_plain (dev, offsetof(amb_mem, interrupt));
diff --git a/drivers/atm/horizon.c b/drivers/atm/horizon.c
index 33e9ee4..f593492 100644
--- a/drivers/atm/horizon.c
+++ b/drivers/atm/horizon.c
@@ -1389,15 +1389,6 @@
PRINTD (DBG_FLOW, "interrupt_handler: %p", dev_id);
- if (!dev_id) {
- PRINTD (DBG_IRQ|DBG_ERR, "irq with NULL dev_id: %d", irq);
- return IRQ_NONE;
- }
- if (irq != dev->irq) {
- PRINTD (DBG_IRQ|DBG_ERR, "irq mismatch: %d", irq);
- return IRQ_NONE;
- }
-
// definitely for us
irq_ok = 0;
while ((int_source = rd_regl (dev, INT_SOURCE_REG_OFF)
diff --git a/drivers/atm/lanai.c b/drivers/atm/lanai.c
index 8895f02..2678255 100644
--- a/drivers/atm/lanai.c
+++ b/drivers/atm/lanai.c
@@ -1892,11 +1892,9 @@
static irqreturn_t lanai_int(int irq, void *devid)
{
- struct lanai_dev *lanai = (struct lanai_dev *) devid;
+ struct lanai_dev *lanai = devid;
u32 reason;
- (void) irq; /* unused variables */
-
#ifdef USE_POWERDOWN
/*
* If we're powered down we shouldn't be generating any interrupts -