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-rw-r--r--kernel/irq/chip.c43
-rw-r--r--kernel/irq/handle.c3
-rw-r--r--kernel/irq/manage.c38
-rw-r--r--kernel/irq/proc.c1
-rw-r--r--kernel/irq/spurious.c18
5 files changed, 48 insertions, 55 deletions
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index d96d6f687c48..4895fde4eb93 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -24,11 +24,9 @@
*/
void dynamic_irq_init(unsigned int irq)
{
- struct irq_desc *desc;
+ struct irq_desc *desc = irq_to_desc(irq);
unsigned long flags;
- /* first time to use this irq_desc */
- desc = irq_to_desc(irq);
if (!desc) {
WARN(1, KERN_ERR "Trying to initialize invalid IRQ%d\n", irq);
return;
@@ -58,10 +56,9 @@ void dynamic_irq_init(unsigned int irq)
*/
void dynamic_irq_cleanup(unsigned int irq)
{
- struct irq_desc *desc;
+ struct irq_desc *desc = irq_to_desc(irq);
unsigned long flags;
- desc = irq_to_desc(irq);
if (!desc) {
WARN(1, KERN_ERR "Trying to cleanup invalid IRQ%d\n", irq);
return;
@@ -90,10 +87,9 @@ void dynamic_irq_cleanup(unsigned int irq)
*/
int set_irq_chip(unsigned int irq, struct irq_chip *chip)
{
- struct irq_desc *desc;
+ struct irq_desc *desc = irq_to_desc(irq);
unsigned long flags;
- desc = irq_to_desc(irq);
if (!desc) {
WARN(1, KERN_ERR "Trying to install chip for IRQ%d\n", irq);
return -EINVAL;
@@ -118,11 +114,10 @@ EXPORT_SYMBOL(set_irq_chip);
*/
int set_irq_type(unsigned int irq, unsigned int type)
{
- struct irq_desc *desc;
+ struct irq_desc *desc = irq_to_desc(irq);
unsigned long flags;
int ret = -ENXIO;
- desc = irq_to_desc(irq);
if (!desc) {
printk(KERN_ERR "Trying to set irq type for IRQ%d\n", irq);
return -ENODEV;
@@ -147,10 +142,9 @@ EXPORT_SYMBOL(set_irq_type);
*/
int set_irq_data(unsigned int irq, void *data)
{
- struct irq_desc *desc;
+ struct irq_desc *desc = irq_to_desc(irq);
unsigned long flags;
- desc = irq_to_desc(irq);
if (!desc) {
printk(KERN_ERR
"Trying to install controller data for IRQ%d\n", irq);
@@ -173,10 +167,9 @@ EXPORT_SYMBOL(set_irq_data);
*/
int set_irq_msi(unsigned int irq, struct msi_desc *entry)
{
- struct irq_desc *desc;
+ struct irq_desc *desc = irq_to_desc(irq);
unsigned long flags;
- desc = irq_to_desc(irq);
if (!desc) {
printk(KERN_ERR
"Trying to install msi data for IRQ%d\n", irq);
@@ -200,10 +193,9 @@ int set_irq_msi(unsigned int irq, struct msi_desc *entry)
*/
int set_irq_chip_data(unsigned int irq, void *data)
{
- struct irq_desc *desc;
+ struct irq_desc *desc = irq_to_desc(irq);
unsigned long flags;
- desc = irq_to_desc(irq);
if (!desc) {
printk(KERN_ERR
"Trying to install chip data for IRQ%d\n", irq);
@@ -228,9 +220,8 @@ EXPORT_SYMBOL(set_irq_chip_data);
*/
static void default_enable(unsigned int irq)
{
- struct irq_desc *desc;
+ struct irq_desc *desc = irq_to_desc(irq);
- desc = irq_to_desc(irq);
desc->chip->unmask(irq);
desc->status &= ~IRQ_MASKED;
}
@@ -247,11 +238,9 @@ static void default_disable(unsigned int irq)
*/
static unsigned int default_startup(unsigned int irq)
{
- struct irq_desc *desc;
+ struct irq_desc *desc = irq_to_desc(irq);
- desc = irq_to_desc(irq);
desc->chip->enable(irq);
-
return 0;
}
@@ -260,9 +249,8 @@ static unsigned int default_startup(unsigned int irq)
*/
static void default_shutdown(unsigned int irq)
{
- struct irq_desc *desc;
+ struct irq_desc *desc = irq_to_desc(irq);
- desc = irq_to_desc(irq);
desc->chip->mask(irq);
desc->status |= IRQ_MASKED;
}
@@ -550,10 +538,9 @@ void
__set_irq_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
const char *name)
{
- struct irq_desc *desc;
+ struct irq_desc *desc = irq_to_desc(irq);
unsigned long flags;
- desc = irq_to_desc(irq);
if (!desc) {
printk(KERN_ERR
"Trying to install type control for IRQ%d\n", irq);
@@ -614,13 +601,11 @@ set_irq_chip_and_handler_name(unsigned int irq, struct irq_chip *chip,
void __init set_irq_noprobe(unsigned int irq)
{
- struct irq_desc *desc;
+ struct irq_desc *desc = irq_to_desc(irq);
unsigned long flags;
- desc = irq_to_desc(irq);
if (!desc) {
printk(KERN_ERR "Trying to mark IRQ%d non-probeable\n", irq);
-
return;
}
@@ -631,13 +616,11 @@ void __init set_irq_noprobe(unsigned int irq)
void __init set_irq_probe(unsigned int irq)
{
- struct irq_desc *desc;
+ struct irq_desc *desc = irq_to_desc(irq);
unsigned long flags;
- desc = irq_to_desc(irq);
if (!desc) {
printk(KERN_ERR "Trying to mark IRQ%d probeable\n", irq);
-
return;
}
diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c
index 9fe86b3a60a5..a69368ff607f 100644
--- a/kernel/irq/handle.c
+++ b/kernel/irq/handle.c
@@ -68,9 +68,8 @@ struct irq_desc irq_desc[NR_IRQS] __cacheline_aligned_in_smp = {
*/
static void ack_bad(unsigned int irq)
{
- struct irq_desc *desc;
+ struct irq_desc *desc = irq_to_desc(irq);
- desc = irq_to_desc(irq);
print_irq_desc(irq, desc);
ack_bad_irq(irq);
}
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index ad2ce72c83c4..c498a1b8c621 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -140,10 +140,9 @@ int irq_select_affinity(unsigned int irq)
*/
void disable_irq_nosync(unsigned int irq)
{
- struct irq_desc *desc;
+ struct irq_desc *desc = irq_to_desc(irq);
unsigned long flags;
- desc = irq_to_desc(irq);
if (!desc)
return;
@@ -170,9 +169,8 @@ EXPORT_SYMBOL(disable_irq_nosync);
*/
void disable_irq(unsigned int irq)
{
- struct irq_desc *desc;
+ struct irq_desc *desc = irq_to_desc(irq);
- desc = irq_to_desc(irq);
if (!desc)
return;
@@ -213,10 +211,9 @@ static void __enable_irq(struct irq_desc *desc, unsigned int irq)
*/
void enable_irq(unsigned int irq)
{
- struct irq_desc *desc;
+ struct irq_desc *desc = irq_to_desc(irq);
unsigned long flags;
- desc = irq_to_desc(irq);
if (!desc)
return;
@@ -291,10 +288,9 @@ EXPORT_SYMBOL(set_irq_wake);
*/
int can_request_irq(unsigned int irq, unsigned long irqflags)
{
- struct irq_desc *desc;
+ struct irq_desc *desc = irq_to_desc(irq);
struct irqaction *action;
- desc = irq_to_desc(irq);
if (!desc)
return 0;
@@ -355,16 +351,15 @@ int __irq_set_trigger(struct irq_desc *desc, unsigned int irq,
* Internal function to register an irqaction - typically used to
* allocate special interrupts that are part of the architecture.
*/
-int setup_irq(unsigned int irq, struct irqaction *new)
+static int
+__setup_irq(unsigned int irq, struct irq_desc * desc, struct irqaction *new)
{
- struct irq_desc *desc;
struct irqaction *old, **p;
const char *old_name = NULL;
unsigned long flags;
int shared = 0;
int ret;
- desc = irq_to_desc(irq);
if (!desc)
return -EINVAL;
@@ -504,6 +499,20 @@ mismatch:
}
/**
+ * setup_irq - setup an interrupt
+ * @irq: Interrupt line to setup
+ * @act: irqaction for the interrupt
+ *
+ * Used to statically setup interrupts in the early boot process.
+ */
+int setup_irq(unsigned int irq, struct irqaction *act)
+{
+ struct irq_desc *desc = irq_to_desc(irq);
+
+ return __setup_irq(irq, desc, act);
+}
+
+/**
* free_irq - free an interrupt
* @irq: Interrupt line to free
* @dev_id: Device identity to free
@@ -519,13 +528,12 @@ mismatch:
*/
void free_irq(unsigned int irq, void *dev_id)
{
- struct irq_desc *desc;
+ struct irq_desc *desc = irq_to_desc(irq);
struct irqaction **p;
unsigned long flags;
WARN_ON(in_interrupt());
- desc = irq_to_desc(irq);
if (!desc)
return;
@@ -624,8 +632,8 @@ int request_irq(unsigned int irq, irq_handler_t handler,
unsigned long irqflags, const char *devname, void *dev_id)
{
struct irqaction *action;
- int retval;
struct irq_desc *desc;
+ int retval;
#ifdef CONFIG_LOCKDEP
/*
@@ -662,7 +670,7 @@ int request_irq(unsigned int irq, irq_handler_t handler,
action->next = NULL;
action->dev_id = dev_id;
- retval = setup_irq(irq, action);
+ retval = __setup_irq(irq, desc, action);
if (retval)
kfree(action);
diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c
index bc0993d86c8b..fac014a81b24 100644
--- a/kernel/irq/proc.c
+++ b/kernel/irq/proc.c
@@ -215,6 +215,7 @@ void unregister_handler_proc(unsigned int irq, struct irqaction *action)
{
if (action->dir) {
struct irq_desc *desc = irq_to_desc(irq);
+
remove_proc_entry(action->dir->name, desc->dir);
}
}
diff --git a/kernel/irq/spurious.c b/kernel/irq/spurious.c
index ec5a4bef3054..dd364c11e56e 100644
--- a/kernel/irq/spurious.c
+++ b/kernel/irq/spurious.c
@@ -26,8 +26,7 @@ static DEFINE_TIMER(poll_spurious_irq_timer, poll_spurious_irqs, 0, 0);
static int try_one_irq(int irq, struct irq_desc *desc)
{
struct irqaction *action;
- int ok = 0;
- int work = 0; /* Did we do work for a real IRQ */
+ int ok = 0, work = 0;
spin_lock(&desc->lock);
/* Already running on another processor */
@@ -88,9 +87,8 @@ static int try_one_irq(int irq, struct irq_desc *desc)
static int misrouted_irq(int irq)
{
- int i;
- int ok = 0;
struct irq_desc *desc;
+ int i, ok = 0;
for_each_irq_desc(i, desc) {
if (!i)
@@ -108,8 +106,8 @@ static int misrouted_irq(int irq)
static void poll_spurious_irqs(unsigned long dummy)
{
- int i;
struct irq_desc *desc;
+ int i;
for_each_irq_desc(i, desc) {
unsigned int status;
@@ -126,7 +124,8 @@ static void poll_spurious_irqs(unsigned long dummy)
try_one_irq(i, desc);
}
- mod_timer(&poll_spurious_irq_timer, jiffies + POLL_SPURIOUS_IRQ_INTERVAL);
+ mod_timer(&poll_spurious_irq_timer,
+ jiffies + POLL_SPURIOUS_IRQ_INTERVAL);
}
/*
@@ -177,7 +176,9 @@ report_bad_irq(unsigned int irq, struct irq_desc *desc, irqreturn_t action_ret)
}
}
-static inline int try_misrouted_irq(unsigned int irq, struct irq_desc *desc, irqreturn_t action_ret)
+static inline int
+try_misrouted_irq(unsigned int irq, struct irq_desc *desc,
+ irqreturn_t action_ret)
{
struct irqaction *action;
@@ -253,7 +254,8 @@ void note_interrupt(unsigned int irq, struct irq_desc *desc,
desc->depth++;
desc->chip->disable(irq);
- mod_timer(&poll_spurious_irq_timer, jiffies + POLL_SPURIOUS_IRQ_INTERVAL);
+ mod_timer(&poll_spurious_irq_timer,
+ jiffies + POLL_SPURIOUS_IRQ_INTERVAL);
}
desc->irqs_unhandled = 0;
}
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