*/
#include <linux/irq.h>
+#include <linux/msi.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/kernel_stat.h>
#include "internals.h"
/**
+ * dynamic_irq_init - initialize a dynamically allocated irq
+ * @irq: irq number to initialize
+ */
+void dynamic_irq_init(unsigned int irq)
+{
+ struct irq_desc *desc;
+ unsigned long flags;
+
+ desc = irq_to_desc(irq);
+ if (!desc) {
+ WARN(1, KERN_ERR "Trying to initialize invalid IRQ%d\n", irq);
+ return;
+ }
+
+ /* Ensure we don't have left over values from a previous use of this irq */
+ raw_spin_lock_irqsave(&desc->lock, flags);
+ desc->status = IRQ_DISABLED;
+ desc->chip = &no_irq_chip;
+ desc->handle_irq = handle_bad_irq;
+ desc->depth = 1;
+ desc->msi_desc = NULL;
+ desc->handler_data = NULL;
+ desc->chip_data = NULL;
+ desc->action = NULL;
+ desc->irq_count = 0;
+ desc->irqs_unhandled = 0;
+#ifdef CONFIG_SMP
+ cpumask_setall(desc->affinity);
+#ifdef CONFIG_GENERIC_PENDING_IRQ
+ cpumask_clear(desc->pending_mask);
+#endif
+#endif
+ raw_spin_unlock_irqrestore(&desc->lock, flags);
+}
+
+/**
+ * dynamic_irq_cleanup - cleanup a dynamically allocated irq
+ * @irq: irq number to initialize
+ */
+void dynamic_irq_cleanup(unsigned int irq)
+{
+ struct irq_desc *desc = irq_to_desc(irq);
+ unsigned long flags;
+
+ if (!desc) {
+ WARN(1, KERN_ERR "Trying to cleanup invalid IRQ%d\n", irq);
+ return;
+ }
+
+ raw_spin_lock_irqsave(&desc->lock, flags);
+ if (desc->action) {
+ raw_spin_unlock_irqrestore(&desc->lock, flags);
+ WARN(1, KERN_ERR "Destroying IRQ%d without calling free_irq\n",
+ irq);
+ return;
+ }
+ desc->msi_desc = NULL;
+ desc->handler_data = NULL;
+ desc->chip_data = NULL;
+ desc->handle_irq = handle_bad_irq;
+ desc->chip = &no_irq_chip;
+ desc->name = NULL;
+ clear_kstat_irqs(desc);
+ raw_spin_unlock_irqrestore(&desc->lock, flags);
+}
+
+
+/**
* set_irq_chip - set the irq chip for an irq
* @irq: irq number
* @chip: pointer to irq chip description structure
*/
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;
- if (irq >= NR_IRQS) {
- printk(KERN_ERR "Trying to install chip for IRQ%d\n", irq);
- WARN_ON(1);
+ if (!desc) {
+ WARN(1, KERN_ERR "Trying to install chip for IRQ%d\n", irq);
return -EINVAL;
}
if (!chip)
chip = &no_irq_chip;
- desc = irq_desc + irq;
- spin_lock_irqsave(&desc->lock, flags);
+ raw_spin_lock_irqsave(&desc->lock, flags);
irq_chip_set_defaults(chip);
desc->chip = chip;
- /*
- * For compatibility only:
- */
- desc->chip = chip;
- spin_unlock_irqrestore(&desc->lock, flags);
+ raw_spin_unlock_irqrestore(&desc->lock, flags);
return 0;
}
EXPORT_SYMBOL(set_irq_chip);
/**
- * set_irq_type - set the irq type for an irq
+ * set_irq_type - set the irq trigger type for an irq
* @irq: irq number
- * @type: interrupt type - see include/linux/interrupt.h
+ * @type: IRQ_TYPE_{LEVEL,EDGE}_* value - see include/linux/irq.h
*/
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;
- if (irq >= NR_IRQS) {
+ if (!desc) {
printk(KERN_ERR "Trying to set irq type for IRQ%d\n", irq);
return -ENODEV;
}
- desc = irq_desc + irq;
- if (desc->chip->set_type) {
- spin_lock_irqsave(&desc->lock, flags);
- ret = desc->chip->set_type(irq, type);
- spin_unlock_irqrestore(&desc->lock, flags);
- }
+ type &= IRQ_TYPE_SENSE_MASK;
+ if (type == IRQ_TYPE_NONE)
+ return 0;
+
+ raw_spin_lock_irqsave(&desc->lock, flags);
+ ret = __irq_set_trigger(desc, irq, type);
+ raw_spin_unlock_irqrestore(&desc->lock, flags);
return ret;
}
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;
- if (irq >= NR_IRQS) {
+ if (!desc) {
printk(KERN_ERR
"Trying to install controller data for IRQ%d\n", irq);
return -EINVAL;
}
- desc = irq_desc + irq;
- spin_lock_irqsave(&desc->lock, flags);
+ raw_spin_lock_irqsave(&desc->lock, flags);
desc->handler_data = data;
- spin_unlock_irqrestore(&desc->lock, flags);
+ raw_spin_unlock_irqrestore(&desc->lock, flags);
return 0;
}
EXPORT_SYMBOL(set_irq_data);
/**
+ * set_irq_msi - set MSI descriptor data for an irq
+ * @irq: Interrupt number
+ * @entry: Pointer to MSI descriptor data
+ *
+ * Set the MSI descriptor entry for an irq
+ */
+int set_irq_msi(unsigned int irq, struct msi_desc *entry)
+{
+ struct irq_desc *desc = irq_to_desc(irq);
+ unsigned long flags;
+
+ if (!desc) {
+ printk(KERN_ERR
+ "Trying to install msi data for IRQ%d\n", irq);
+ return -EINVAL;
+ }
+
+ raw_spin_lock_irqsave(&desc->lock, flags);
+ desc->msi_desc = entry;
+ if (entry)
+ entry->irq = irq;
+ raw_spin_unlock_irqrestore(&desc->lock, flags);
+ return 0;
+}
+
+/**
* set_irq_chip_data - set irq chip data for an irq
* @irq: Interrupt number
* @data: Pointer to chip specific data
*/
int set_irq_chip_data(unsigned int irq, void *data)
{
- struct irq_desc *desc = irq_desc + irq;
+ struct irq_desc *desc = irq_to_desc(irq);
unsigned long flags;
- if (irq >= NR_IRQS || !desc->chip) {
+ if (!desc) {
+ printk(KERN_ERR
+ "Trying to install chip data for IRQ%d\n", irq);
+ return -EINVAL;
+ }
+
+ if (!desc->chip) {
printk(KERN_ERR "BUG: bad set_irq_chip_data(IRQ#%d)\n", irq);
return -EINVAL;
}
- spin_lock_irqsave(&desc->lock, flags);
+ raw_spin_lock_irqsave(&desc->lock, flags);
desc->chip_data = data;
- spin_unlock_irqrestore(&desc->lock, flags);
+ raw_spin_unlock_irqrestore(&desc->lock, flags);
return 0;
}
EXPORT_SYMBOL(set_irq_chip_data);
+/**
+ * set_irq_nested_thread - Set/Reset the IRQ_NESTED_THREAD flag of an irq
+ *
+ * @irq: Interrupt number
+ * @nest: 0 to clear / 1 to set the IRQ_NESTED_THREAD flag
+ *
+ * The IRQ_NESTED_THREAD flag indicates that on
+ * request_threaded_irq() no separate interrupt thread should be
+ * created for the irq as the handler are called nested in the
+ * context of a demultiplexing interrupt handler thread.
+ */
+void set_irq_nested_thread(unsigned int irq, int nest)
+{
+ struct irq_desc *desc = irq_to_desc(irq);
+ unsigned long flags;
+
+ if (!desc)
+ return;
+
+ raw_spin_lock_irqsave(&desc->lock, flags);
+ if (nest)
+ desc->status |= IRQ_NESTED_THREAD;
+ else
+ desc->status &= ~IRQ_NESTED_THREAD;
+ raw_spin_unlock_irqrestore(&desc->lock, flags);
+}
+EXPORT_SYMBOL_GPL(set_irq_nested_thread);
+
/*
* default enable function
*/
static void default_enable(unsigned int irq)
{
- struct irq_desc *desc = irq_desc + irq;
+ struct irq_desc *desc = irq_to_desc(irq);
desc->chip->unmask(irq);
desc->status &= ~IRQ_MASKED;
*/
static void default_disable(unsigned int irq)
{
- struct irq_desc *desc = irq_desc + irq;
-
- if (!(desc->status & IRQ_DELAYED_DISABLE))
- irq_desc[irq].chip->mask(irq);
}
/*
*/
static unsigned int default_startup(unsigned int irq)
{
- irq_desc[irq].chip->enable(irq);
+ struct irq_desc *desc = irq_to_desc(irq);
+ desc->chip->enable(irq);
return 0;
}
/*
+ * default shutdown function
+ */
+static void default_shutdown(unsigned int irq)
+{
+ struct irq_desc *desc = irq_to_desc(irq);
+
+ desc->chip->mask(irq);
+ desc->status |= IRQ_MASKED;
+}
+
+/*
* Fixup enable/disable function pointers
*/
void irq_chip_set_defaults(struct irq_chip *chip)
chip->disable = default_disable;
if (!chip->startup)
chip->startup = default_startup;
+ /*
+ * We use chip->disable, when the user provided its own. When
+ * we have default_disable set for chip->disable, then we need
+ * to use default_shutdown, otherwise the irq line is not
+ * disabled on free_irq():
+ */
if (!chip->shutdown)
- chip->shutdown = chip->disable;
+ chip->shutdown = chip->disable != default_disable ?
+ chip->disable : default_shutdown;
if (!chip->name)
chip->name = chip->typename;
+ if (!chip->end)
+ chip->end = dummy_irq_chip.end;
}
static inline void mask_ack_irq(struct irq_desc *desc, int irq)
desc->chip->mask_ack(irq);
else {
desc->chip->mask(irq);
- desc->chip->ack(irq);
+ if (desc->chip->ack)
+ desc->chip->ack(irq);
}
}
+/*
+ * handle_nested_irq - Handle a nested irq from a irq thread
+ * @irq: the interrupt number
+ *
+ * Handle interrupts which are nested into a threaded interrupt
+ * handler. The handler function is called inside the calling
+ * threads context.
+ */
+void handle_nested_irq(unsigned int irq)
+{
+ struct irq_desc *desc = irq_to_desc(irq);
+ struct irqaction *action;
+ irqreturn_t action_ret;
+
+ might_sleep();
+
+ raw_spin_lock_irq(&desc->lock);
+
+ kstat_incr_irqs_this_cpu(irq, desc);
+
+ action = desc->action;
+ if (unlikely(!action || (desc->status & IRQ_DISABLED)))
+ goto out_unlock;
+
+ desc->status |= IRQ_INPROGRESS;
+ raw_spin_unlock_irq(&desc->lock);
+
+ action_ret = action->thread_fn(action->irq, action->dev_id);
+ if (!noirqdebug)
+ note_interrupt(irq, desc, action_ret);
+
+ raw_spin_lock_irq(&desc->lock);
+ desc->status &= ~IRQ_INPROGRESS;
+
+out_unlock:
+ raw_spin_unlock_irq(&desc->lock);
+}
+EXPORT_SYMBOL_GPL(handle_nested_irq);
+
/**
* handle_simple_irq - Simple and software-decoded IRQs.
* @irq: the interrupt number
* @desc: the interrupt description structure for this irq
- * @regs: pointer to a register structure
*
* Simple interrupts are either sent from a demultiplexing interrupt
* handler or come from hardware, where no interrupt hardware control
* Note: The caller is expected to handle the ack, clear, mask and
* unmask issues if necessary.
*/
-void fastcall
-handle_simple_irq(unsigned int irq, struct irq_desc *desc, struct pt_regs *regs)
+void
+handle_simple_irq(unsigned int irq, struct irq_desc *desc)
{
struct irqaction *action;
irqreturn_t action_ret;
- const unsigned int cpu = smp_processor_id();
- spin_lock(&desc->lock);
+ raw_spin_lock(&desc->lock);
if (unlikely(desc->status & IRQ_INPROGRESS))
goto out_unlock;
desc->status &= ~(IRQ_REPLAY | IRQ_WAITING);
- kstat_cpu(cpu).irqs[irq]++;
+ kstat_incr_irqs_this_cpu(irq, desc);
action = desc->action;
if (unlikely(!action || (desc->status & IRQ_DISABLED)))
goto out_unlock;
desc->status |= IRQ_INPROGRESS;
- spin_unlock(&desc->lock);
+ raw_spin_unlock(&desc->lock);
- action_ret = handle_IRQ_event(irq, regs, action);
+ action_ret = handle_IRQ_event(irq, action);
if (!noirqdebug)
- note_interrupt(irq, desc, action_ret, regs);
+ note_interrupt(irq, desc, action_ret);
- spin_lock(&desc->lock);
+ raw_spin_lock(&desc->lock);
desc->status &= ~IRQ_INPROGRESS;
out_unlock:
- spin_unlock(&desc->lock);
+ raw_spin_unlock(&desc->lock);
}
/**
* handle_level_irq - Level type irq handler
* @irq: the interrupt number
* @desc: the interrupt description structure for this irq
- * @regs: pointer to a register structure
*
* Level type interrupts are active as long as the hardware line has
* the active level. This may require to mask the interrupt and unmask
* it after the associated handler has acknowledged the device, so the
* interrupt line is back to inactive.
*/
-void fastcall
-handle_level_irq(unsigned int irq, struct irq_desc *desc, struct pt_regs *regs)
+void
+handle_level_irq(unsigned int irq, struct irq_desc *desc)
{
- unsigned int cpu = smp_processor_id();
struct irqaction *action;
irqreturn_t action_ret;
- spin_lock(&desc->lock);
+ raw_spin_lock(&desc->lock);
mask_ack_irq(desc, irq);
if (unlikely(desc->status & IRQ_INPROGRESS))
- goto out;
+ goto out_unlock;
desc->status &= ~(IRQ_REPLAY | IRQ_WAITING);
- kstat_cpu(cpu).irqs[irq]++;
+ kstat_incr_irqs_this_cpu(irq, desc);
/*
* If its disabled or no action available
*/
action = desc->action;
if (unlikely(!action || (desc->status & IRQ_DISABLED)))
- goto out;
+ goto out_unlock;
desc->status |= IRQ_INPROGRESS;
- spin_unlock(&desc->lock);
+ raw_spin_unlock(&desc->lock);
- action_ret = handle_IRQ_event(irq, regs, action);
+ action_ret = handle_IRQ_event(irq, action);
if (!noirqdebug)
- note_interrupt(irq, desc, action_ret, regs);
+ note_interrupt(irq, desc, action_ret);
- spin_lock(&desc->lock);
+ raw_spin_lock(&desc->lock);
desc->status &= ~IRQ_INPROGRESS;
-out:
- if (!(desc->status & IRQ_DISABLED) && desc->chip->unmask)
+
+ if (unlikely(desc->status & IRQ_ONESHOT))
+ desc->status |= IRQ_MASKED;
+ else if (!(desc->status & IRQ_DISABLED) && desc->chip->unmask)
desc->chip->unmask(irq);
- spin_unlock(&desc->lock);
+out_unlock:
+ raw_spin_unlock(&desc->lock);
}
+EXPORT_SYMBOL_GPL(handle_level_irq);
/**
* handle_fasteoi_irq - irq handler for transparent controllers
* @irq: the interrupt number
* @desc: the interrupt description structure for this irq
- * @regs: pointer to a register structure
*
* Only a single callback will be issued to the chip: an ->eoi()
* call when the interrupt has been serviced. This enables support
* for modern forms of interrupt handlers, which handle the flow
* details in hardware, transparently.
*/
-void fastcall
-handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc,
- struct pt_regs *regs)
+void
+handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc)
{
- unsigned int cpu = smp_processor_id();
struct irqaction *action;
irqreturn_t action_ret;
- spin_lock(&desc->lock);
+ raw_spin_lock(&desc->lock);
if (unlikely(desc->status & IRQ_INPROGRESS))
goto out;
desc->status &= ~(IRQ_REPLAY | IRQ_WAITING);
- kstat_cpu(cpu).irqs[irq]++;
+ kstat_incr_irqs_this_cpu(irq, desc);
/*
* If its disabled or no action available
- * keep it masked and get out of here
+ * then mask it and get out of here:
*/
action = desc->action;
if (unlikely(!action || (desc->status & IRQ_DISABLED))) {
desc->status |= IRQ_PENDING;
+ if (desc->chip->mask)
+ desc->chip->mask(irq);
goto out;
}
desc->status |= IRQ_INPROGRESS;
desc->status &= ~IRQ_PENDING;
- spin_unlock(&desc->lock);
+ raw_spin_unlock(&desc->lock);
- action_ret = handle_IRQ_event(irq, regs, action);
+ action_ret = handle_IRQ_event(irq, action);
if (!noirqdebug)
- note_interrupt(irq, desc, action_ret, regs);
+ note_interrupt(irq, desc, action_ret);
- spin_lock(&desc->lock);
+ raw_spin_lock(&desc->lock);
desc->status &= ~IRQ_INPROGRESS;
out:
desc->chip->eoi(irq);
- spin_unlock(&desc->lock);
+ raw_spin_unlock(&desc->lock);
}
/**
* handle_edge_irq - edge type IRQ handler
* @irq: the interrupt number
* @desc: the interrupt description structure for this irq
- * @regs: pointer to a register structure
*
* Interrupt occures on the falling and/or rising edge of a hardware
* signal. The occurence is latched into the irq controller hardware
* the handler was running. If all pending interrupts are handled, the
* loop is left.
*/
-void fastcall
-handle_edge_irq(unsigned int irq, struct irq_desc *desc, struct pt_regs *regs)
+void
+handle_edge_irq(unsigned int irq, struct irq_desc *desc)
{
- const unsigned int cpu = smp_processor_id();
-
- spin_lock(&desc->lock);
+ raw_spin_lock(&desc->lock);
desc->status &= ~(IRQ_REPLAY | IRQ_WAITING);
mask_ack_irq(desc, irq);
goto out_unlock;
}
-
- kstat_cpu(cpu).irqs[irq]++;
+ kstat_incr_irqs_this_cpu(irq, desc);
/* Start handling the irq */
- desc->chip->ack(irq);
+ if (desc->chip->ack)
+ desc->chip->ack(irq);
/* Mark the IRQ currently in progress.*/
desc->status |= IRQ_INPROGRESS;
}
desc->status &= ~IRQ_PENDING;
- spin_unlock(&desc->lock);
- action_ret = handle_IRQ_event(irq, regs, action);
+ raw_spin_unlock(&desc->lock);
+ action_ret = handle_IRQ_event(irq, action);
if (!noirqdebug)
- note_interrupt(irq, desc, action_ret, regs);
- spin_lock(&desc->lock);
+ note_interrupt(irq, desc, action_ret);
+ raw_spin_lock(&desc->lock);
} while ((desc->status & (IRQ_PENDING | IRQ_DISABLED)) == IRQ_PENDING);
desc->status &= ~IRQ_INPROGRESS;
out_unlock:
- spin_unlock(&desc->lock);
+ raw_spin_unlock(&desc->lock);
}
-#ifdef CONFIG_SMP
/**
- * handle_percpu_IRQ - Per CPU local irq handler
+ * handle_percpu_irq - Per CPU local irq handler
* @irq: the interrupt number
* @desc: the interrupt description structure for this irq
- * @regs: pointer to a register structure
*
* Per CPU interrupts on SMP machines without locking requirements
*/
-void fastcall
-handle_percpu_irq(unsigned int irq, struct irq_desc *desc, struct pt_regs *regs)
+void
+handle_percpu_irq(unsigned int irq, struct irq_desc *desc)
{
irqreturn_t action_ret;
- kstat_this_cpu.irqs[irq]++;
+ kstat_incr_irqs_this_cpu(irq, desc);
if (desc->chip->ack)
desc->chip->ack(irq);
- action_ret = handle_IRQ_event(irq, regs, desc->action);
+ action_ret = handle_IRQ_event(irq, desc->action);
if (!noirqdebug)
- note_interrupt(irq, desc, action_ret, regs);
+ note_interrupt(irq, desc, action_ret);
if (desc->chip->eoi)
desc->chip->eoi(irq);
}
-#endif /* CONFIG_SMP */
-
void
-__set_irq_handler(unsigned int irq,
- void fastcall (*handle)(unsigned int, irq_desc_t *,
- struct pt_regs *),
- int is_chained)
+__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;
- if (irq >= NR_IRQS) {
+ if (!desc) {
printk(KERN_ERR
"Trying to install type control for IRQ%d\n", irq);
return;
}
- desc = irq_desc + irq;
-
if (!handle)
handle = handle_bad_irq;
+ else if (desc->chip == &no_irq_chip) {
+ printk(KERN_WARNING "Trying to install %sinterrupt handler "
+ "for IRQ%d\n", is_chained ? "chained " : "", irq);
+ /*
+ * Some ARM implementations install a handler for really dumb
+ * interrupt hardware without setting an irq_chip. This worked
+ * with the ARM no_irq_chip but the check in setup_irq would
+ * prevent us to setup the interrupt at all. Switch it to
+ * dummy_irq_chip for easy transition.
+ */
+ desc->chip = &dummy_irq_chip;
+ }
- if (is_chained && desc->chip == &no_irq_chip)
- printk(KERN_WARNING "Trying to install "
- "chained interrupt type for IRQ%d\n", irq);
-
- spin_lock_irqsave(&desc->lock, flags);
+ chip_bus_lock(irq, desc);
+ raw_spin_lock_irqsave(&desc->lock, flags);
/* Uninstall? */
if (handle == handle_bad_irq) {
- if (desc->chip != &no_irq_chip) {
- desc->chip->mask(irq);
- desc->chip->ack(irq);
- }
+ if (desc->chip != &no_irq_chip)
+ mask_ack_irq(desc, irq);
desc->status |= IRQ_DISABLED;
desc->depth = 1;
}
desc->handle_irq = handle;
+ desc->name = name;
if (handle != handle_bad_irq && is_chained) {
desc->status &= ~IRQ_DISABLED;
desc->status |= IRQ_NOREQUEST | IRQ_NOPROBE;
desc->depth = 0;
- desc->chip->unmask(irq);
+ desc->chip->startup(irq);
}
- spin_unlock_irqrestore(&desc->lock, flags);
+ raw_spin_unlock_irqrestore(&desc->lock, flags);
+ chip_bus_sync_unlock(irq, desc);
}
+EXPORT_SYMBOL_GPL(__set_irq_handler);
void
set_irq_chip_and_handler(unsigned int irq, struct irq_chip *chip,
- void fastcall (*handle)(unsigned int,
- struct irq_desc *,
- struct pt_regs *))
+ irq_flow_handler_t handle)
{
set_irq_chip(irq, chip);
- __set_irq_handler(irq, handle, 0);
+ __set_irq_handler(irq, handle, 0, NULL);
}
-/*
- * Get a descriptive string for the highlevel handler, for
- * /proc/interrupts output:
- */
-const char *
-handle_irq_name(void fastcall (*handle)(unsigned int, struct irq_desc *,
- struct pt_regs *))
+void
+set_irq_chip_and_handler_name(unsigned int irq, struct irq_chip *chip,
+ irq_flow_handler_t handle, const char *name)
{
- if (handle == handle_level_irq)
- return "level ";
- if (handle == handle_fasteoi_irq)
- return "fasteoi";
- if (handle == handle_edge_irq)
- return "edge ";
- if (handle == handle_simple_irq)
- return "simple ";
-#ifdef CONFIG_SMP
- if (handle == handle_percpu_irq)
- return "percpu ";
-#endif
- if (handle == handle_bad_irq)
- return "bad ";
+ set_irq_chip(irq, chip);
+ __set_irq_handler(irq, handle, 0, name);
+}
+
+void __init set_irq_noprobe(unsigned int irq)
+{
+ struct irq_desc *desc = irq_to_desc(irq);
+ unsigned long flags;
+
+ if (!desc) {
+ printk(KERN_ERR "Trying to mark IRQ%d non-probeable\n", irq);
+ return;
+ }
+
+ raw_spin_lock_irqsave(&desc->lock, flags);
+ desc->status |= IRQ_NOPROBE;
+ raw_spin_unlock_irqrestore(&desc->lock, flags);
+}
+
+void __init set_irq_probe(unsigned int irq)
+{
+ struct irq_desc *desc = irq_to_desc(irq);
+ unsigned long flags;
+
+ if (!desc) {
+ printk(KERN_ERR "Trying to mark IRQ%d probeable\n", irq);
+ return;
+ }
- return NULL;
+ raw_spin_lock_irqsave(&desc->lock, flags);
+ desc->status &= ~IRQ_NOPROBE;
+ raw_spin_unlock_irqrestore(&desc->lock, flags);
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff