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Diffstat (limited to 'kernel')
-rw-r--r--kernel/irq/chip.c93
-rw-r--r--kernel/irq/manage.c81
2 files changed, 57 insertions, 117 deletions
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index c19c0b562c80..3ea6aecd99c0 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -25,22 +25,18 @@
*/
int irq_set_chip(unsigned int irq, struct irq_chip *chip)
{
- struct irq_desc *desc = irq_to_desc(irq);
unsigned long flags;
+ struct irq_desc *desc = irq_get_desc_lock(irq, &flags);
- if (!desc) {
- WARN(1, KERN_ERR "Trying to install chip for IRQ%d\n", irq);
+ if (!desc)
return -EINVAL;
- }
if (!chip)
chip = &no_irq_chip;
- raw_spin_lock_irqsave(&desc->lock, flags);
irq_chip_set_defaults(chip);
desc->irq_data.chip = chip;
- raw_spin_unlock_irqrestore(&desc->lock, flags);
-
+ irq_put_desc_unlock(desc, flags);
return 0;
}
EXPORT_SYMBOL(irq_set_chip);
@@ -52,24 +48,17 @@ EXPORT_SYMBOL(irq_set_chip);
*/
int irq_set_irq_type(unsigned int irq, unsigned int type)
{
- struct irq_desc *desc = irq_to_desc(irq);
unsigned long flags;
- int ret = -ENXIO;
+ struct irq_desc *desc = irq_get_desc_buslock(irq, &flags);
+ int ret = 0;
- if (!desc) {
- printk(KERN_ERR "Trying to set irq type for IRQ%d\n", irq);
- return -ENODEV;
- }
+ if (!desc)
+ return -EINVAL;
type &= IRQ_TYPE_SENSE_MASK;
- if (type == IRQ_TYPE_NONE)
- return 0;
-
- chip_bus_lock(desc);
- raw_spin_lock_irqsave(&desc->lock, flags);
- ret = __irq_set_trigger(desc, irq, type);
- raw_spin_unlock_irqrestore(&desc->lock, flags);
- chip_bus_sync_unlock(desc);
+ if (type != IRQ_TYPE_NONE)
+ ret = __irq_set_trigger(desc, irq, type);
+ irq_put_desc_busunlock(desc, flags);
return ret;
}
EXPORT_SYMBOL(irq_set_irq_type);
@@ -83,18 +72,13 @@ EXPORT_SYMBOL(irq_set_irq_type);
*/
int irq_set_handler_data(unsigned int irq, void *data)
{
- struct irq_desc *desc = irq_to_desc(irq);
unsigned long flags;
+ struct irq_desc *desc = irq_get_desc_lock(irq, &flags);
- if (!desc) {
- printk(KERN_ERR
- "Trying to install controller data for IRQ%d\n", irq);
+ if (!desc)
return -EINVAL;
- }
-
- raw_spin_lock_irqsave(&desc->lock, flags);
desc->irq_data.handler_data = data;
- raw_spin_unlock_irqrestore(&desc->lock, flags);
+ irq_put_desc_unlock(desc, flags);
return 0;
}
EXPORT_SYMBOL(irq_set_handler_data);
@@ -108,20 +92,15 @@ EXPORT_SYMBOL(irq_set_handler_data);
*/
int irq_set_msi_desc(unsigned int irq, struct msi_desc *entry)
{
- struct irq_desc *desc = irq_to_desc(irq);
unsigned long flags;
+ struct irq_desc *desc = irq_get_desc_lock(irq, &flags);
- if (!desc) {
- printk(KERN_ERR
- "Trying to install msi data for IRQ%d\n", irq);
+ if (!desc)
return -EINVAL;
- }
-
- raw_spin_lock_irqsave(&desc->lock, flags);
desc->irq_data.msi_desc = entry;
if (entry)
entry->irq = irq;
- raw_spin_unlock_irqrestore(&desc->lock, flags);
+ irq_put_desc_unlock(desc, flags);
return 0;
}
@@ -134,24 +113,13 @@ int irq_set_msi_desc(unsigned int irq, struct msi_desc *entry)
*/
int irq_set_chip_data(unsigned int irq, void *data)
{
- struct irq_desc *desc = irq_to_desc(irq);
unsigned long flags;
+ struct irq_desc *desc = irq_get_desc_lock(irq, &flags);
- if (!desc) {
- printk(KERN_ERR
- "Trying to install chip data for IRQ%d\n", irq);
- return -EINVAL;
- }
-
- if (!desc->irq_data.chip) {
- printk(KERN_ERR "BUG: bad set_irq_chip_data(IRQ#%d)\n", irq);
+ if (!desc)
return -EINVAL;
- }
-
- raw_spin_lock_irqsave(&desc->lock, flags);
desc->irq_data.chip_data = data;
- raw_spin_unlock_irqrestore(&desc->lock, flags);
-
+ irq_put_desc_unlock(desc, flags);
return 0;
}
EXPORT_SYMBOL(irq_set_chip_data);
@@ -635,25 +603,19 @@ void
__set_irq_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
const char *name)
{
- struct irq_desc *desc = irq_to_desc(irq);
unsigned long flags;
+ struct irq_desc *desc = irq_get_desc_buslock(irq, &flags);
- if (!desc) {
- printk(KERN_ERR
- "Trying to install type control for IRQ%d\n", irq);
+ if (!desc)
return;
- }
if (!handle) {
handle = handle_bad_irq;
} else {
if (WARN_ON(desc->irq_data.chip == &no_irq_chip))
- return;
+ goto out;
}
- chip_bus_lock(desc);
- raw_spin_lock_irqsave(&desc->lock, flags);
-
/* Uninstall? */
if (handle == handle_bad_irq) {
if (desc->irq_data.chip != &no_irq_chip)
@@ -670,8 +632,8 @@ __set_irq_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
irq_settings_set_norequest(desc);
irq_startup(desc);
}
- raw_spin_unlock_irqrestore(&desc->lock, flags);
- chip_bus_sync_unlock(desc);
+out:
+ irq_put_desc_busunlock(desc, flags);
}
EXPORT_SYMBOL_GPL(__set_irq_handler);
@@ -693,14 +655,11 @@ set_irq_chip_and_handler_name(unsigned int irq, struct irq_chip *chip,
void irq_modify_status(unsigned int irq, unsigned long clr, unsigned long set)
{
- struct irq_desc *desc = irq_to_desc(irq);
unsigned long flags;
+ struct irq_desc *desc = irq_get_desc_lock(irq, &flags);
if (!desc)
return;
-
- raw_spin_lock_irqsave(&desc->lock, flags);
-
irq_settings_clr_and_set(desc, clr, set);
irqd_clear(&desc->irq_data, IRQD_NO_BALANCING | IRQD_PER_CPU |
@@ -714,5 +673,5 @@ void irq_modify_status(unsigned int irq, unsigned long clr, unsigned long set)
irqd_set(&desc->irq_data, irq_settings_get_trigger_mask(desc));
- raw_spin_unlock_irqrestore(&desc->lock, flags);
+ irq_put_desc_unlock(desc, flags);
}
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 99395a24f432..6cca1956c503 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -172,16 +172,13 @@ int irq_set_affinity(unsigned int irq, const struct cpumask *mask)
int irq_set_affinity_hint(unsigned int irq, const struct cpumask *m)
{
- struct irq_desc *desc = irq_to_desc(irq);
unsigned long flags;
+ struct irq_desc *desc = irq_get_desc_lock(irq, &flags);
if (!desc)
return -EINVAL;
-
- raw_spin_lock_irqsave(&desc->lock, flags);
desc->affinity_hint = m;
- raw_spin_unlock_irqrestore(&desc->lock, flags);
-
+ irq_put_desc_unlock(desc, flags);
return 0;
}
EXPORT_SYMBOL_GPL(irq_set_affinity_hint);
@@ -336,6 +333,18 @@ void __disable_irq(struct irq_desc *desc, unsigned int irq, bool suspend)
irq_disable(desc);
}
+static int __disable_irq_nosync(unsigned int irq)
+{
+ unsigned long flags;
+ struct irq_desc *desc = irq_get_desc_buslock(irq, &flags);
+
+ if (!desc)
+ return -EINVAL;
+ __disable_irq(desc, irq, false);
+ irq_put_desc_busunlock(desc, flags);
+ return 0;
+}
+
/**
* disable_irq_nosync - disable an irq without waiting
* @irq: Interrupt to disable
@@ -349,17 +358,7 @@ void __disable_irq(struct irq_desc *desc, unsigned int irq, bool suspend)
*/
void disable_irq_nosync(unsigned int irq)
{
- struct irq_desc *desc = irq_to_desc(irq);
- unsigned long flags;
-
- if (!desc)
- return;
-
- chip_bus_lock(desc);
- raw_spin_lock_irqsave(&desc->lock, flags);
- __disable_irq(desc, irq, false);
- raw_spin_unlock_irqrestore(&desc->lock, flags);
- chip_bus_sync_unlock(desc);
+ __disable_irq_nosync(irq);
}
EXPORT_SYMBOL(disable_irq_nosync);
@@ -377,13 +376,7 @@ EXPORT_SYMBOL(disable_irq_nosync);
*/
void disable_irq(unsigned int irq)
{
- struct irq_desc *desc = irq_to_desc(irq);
-
- if (!desc)
- return;
-
- disable_irq_nosync(irq);
- if (desc->action)
+ if (!__disable_irq_nosync(irq))
synchronize_irq(irq);
}
EXPORT_SYMBOL(disable_irq);
@@ -434,21 +427,18 @@ void __enable_irq(struct irq_desc *desc, unsigned int irq, bool resume)
*/
void enable_irq(unsigned int irq)
{
- struct irq_desc *desc = irq_to_desc(irq);
unsigned long flags;
+ struct irq_desc *desc = irq_get_desc_buslock(irq, &flags);
if (!desc)
return;
-
if (WARN(!desc->irq_data.chip,
KERN_ERR "enable_irq before setup/request_irq: irq %u\n", irq))
- return;
+ goto out;
- chip_bus_lock(desc);
- raw_spin_lock_irqsave(&desc->lock, flags);
__enable_irq(desc, irq, false);
- raw_spin_unlock_irqrestore(&desc->lock, flags);
- chip_bus_sync_unlock(desc);
+out:
+ irq_put_desc_busunlock(desc, flags);
}
EXPORT_SYMBOL(enable_irq);
@@ -477,15 +467,13 @@ static int set_irq_wake_real(unsigned int irq, unsigned int on)
*/
int irq_set_irq_wake(unsigned int irq, unsigned int on)
{
- struct irq_desc *desc = irq_to_desc(irq);
unsigned long flags;
+ struct irq_desc *desc = irq_get_desc_buslock(irq, &flags);
int ret = 0;
/* wakeup-capable irqs can be shared between drivers that
* don't need to have the same sleep mode behaviors.
*/
- chip_bus_lock(desc);
- raw_spin_lock_irqsave(&desc->lock, flags);
if (on) {
if (desc->wake_depth++ == 0) {
ret = set_irq_wake_real(irq, on);
@@ -505,9 +493,7 @@ int irq_set_irq_wake(unsigned int irq, unsigned int on)
irqd_clear(&desc->irq_data, IRQD_WAKEUP_STATE);
}
}
-
- raw_spin_unlock_irqrestore(&desc->lock, flags);
- chip_bus_sync_unlock(desc);
+ irq_put_desc_busunlock(desc, flags);
return ret;
}
EXPORT_SYMBOL(irq_set_irq_wake);
@@ -519,25 +505,20 @@ EXPORT_SYMBOL(irq_set_irq_wake);
*/
int can_request_irq(unsigned int irq, unsigned long irqflags)
{
- struct irq_desc *desc = irq_to_desc(irq);
- struct irqaction *action;
unsigned long flags;
+ struct irq_desc *desc = irq_get_desc_lock(irq, &flags);
+ int canrequest = 0;
if (!desc)
return 0;
- if (!irq_settings_can_request(desc))
- return 0;
-
- raw_spin_lock_irqsave(&desc->lock, flags);
- action = desc->action;
- if (action)
- if (irqflags & action->flags & IRQF_SHARED)
- action = NULL;
-
- raw_spin_unlock_irqrestore(&desc->lock, flags);
-
- return !action;
+ if (irq_settings_can_request(desc)) {
+ if (desc->action)
+ if (irqflags & desc->action->flags & IRQF_SHARED)
+ canrequest =1;
+ }
+ irq_put_desc_unlock(desc, flags);
+ return canrequest;
}
int __irq_set_trigger(struct irq_desc *desc, unsigned int irq,
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-09 17:27:10 +0000