aboutsummaryrefslogtreecommitdiff
path: root/kernel/irq/autoprobe.c
diff options
context:
space:
mode:
Diffstat (limited to 'kernel/irq/autoprobe.c')
-rw-r--r--kernel/irq/autoprobe.c43
1 files changed, 16 insertions, 27 deletions
diff --git a/kernel/irq/autoprobe.c b/kernel/irq/autoprobe.c
index 533068cfb60..cc0f7321b8c 100644
--- a/kernel/irq/autoprobe.c
+++ b/kernel/irq/autoprobe.c
@@ -30,17 +30,16 @@ static DEFINE_MUTEX(probing_active);
unsigned long probe_irq_on(void)
{
struct irq_desc *desc;
- unsigned long mask;
- unsigned int i;
+ unsigned long mask = 0;
+ unsigned int status;
+ int i;
mutex_lock(&probing_active);
/*
* something may have generated an irq long ago and we want to
* flush such a longstanding irq before considering it as spurious.
*/
- for (i = NR_IRQS-1; i > 0; i--) {
- desc = irq_desc + i;
-
+ for_each_irq_desc_reverse(i, desc) {
spin_lock_irq(&desc->lock);
if (!desc->action && !(desc->status & IRQ_NOPROBE)) {
/*
@@ -68,9 +67,7 @@ unsigned long probe_irq_on(void)
* (we must startup again here because if a longstanding irq
* happened in the previous stage, it may have masked itself)
*/
- for (i = NR_IRQS-1; i > 0; i--) {
- desc = irq_desc + i;
-
+ for_each_irq_desc_reverse(i, desc) {
spin_lock_irq(&desc->lock);
if (!desc->action && !(desc->status & IRQ_NOPROBE)) {
desc->status |= IRQ_AUTODETECT | IRQ_WAITING;
@@ -88,11 +85,7 @@ unsigned long probe_irq_on(void)
/*
* Now filter out any obviously spurious interrupts
*/
- mask = 0;
- for (i = 0; i < NR_IRQS; i++) {
- unsigned int status;
-
- desc = irq_desc + i;
+ for_each_irq_desc(i, desc) {
spin_lock_irq(&desc->lock);
status = desc->status;
@@ -126,14 +119,11 @@ EXPORT_SYMBOL(probe_irq_on);
*/
unsigned int probe_irq_mask(unsigned long val)
{
- unsigned int mask;
+ unsigned int status, mask = 0;
+ struct irq_desc *desc;
int i;
- mask = 0;
- for (i = 0; i < NR_IRQS; i++) {
- struct irq_desc *desc = irq_desc + i;
- unsigned int status;
-
+ for_each_irq_desc(i, desc) {
spin_lock_irq(&desc->lock);
status = desc->status;
@@ -171,20 +161,19 @@ EXPORT_SYMBOL(probe_irq_mask);
*/
int probe_irq_off(unsigned long val)
{
- int i, irq_found = 0, nr_irqs = 0;
-
- for (i = 0; i < NR_IRQS; i++) {
- struct irq_desc *desc = irq_desc + i;
- unsigned int status;
+ int i, irq_found = 0, nr_of_irqs = 0;
+ struct irq_desc *desc;
+ unsigned int status;
+ for_each_irq_desc(i, desc) {
spin_lock_irq(&desc->lock);
status = desc->status;
if (status & IRQ_AUTODETECT) {
if (!(status & IRQ_WAITING)) {
- if (!nr_irqs)
+ if (!nr_of_irqs)
irq_found = i;
- nr_irqs++;
+ nr_of_irqs++;
}
desc->status = status & ~IRQ_AUTODETECT;
desc->chip->shutdown(i);
@@ -193,7 +182,7 @@ int probe_irq_off(unsigned long val)
}
mutex_unlock(&probing_active);
- if (nr_irqs > 1)
+ if (nr_of_irqs > 1)
irq_found = -irq_found;
return irq_found;