#include "internals.h"
+#ifdef CONFIG_IRQ_FORCED_THREADING
+__read_mostly bool force_irqthreads;
+
+static int __init setup_forced_irqthreads(char *arg)
+{
+ force_irqthreads = true;
+ return 0;
+}
+early_param("threadirqs", setup_forced_irqthreads);
+#endif
+
/**
* synchronize_irq - wait for pending IRQ handlers (on other CPUs)
* @irq: interrupt number to wait for
void synchronize_irq(unsigned int irq)
{
struct irq_desc *desc = irq_to_desc(irq);
- unsigned int status;
+ bool inprogress;
if (!desc)
return;
* Wait until we're out of the critical section. This might
* give the wrong answer due to the lack of memory barriers.
*/
- while (desc->status & IRQ_INPROGRESS)
+ while (irqd_irq_inprogress(&desc->irq_data))
cpu_relax();
/* Ok, that indicated we're done: double-check carefully. */
raw_spin_lock_irqsave(&desc->lock, flags);
- status = desc->status;
+ inprogress = irqd_irq_inprogress(&desc->irq_data);
raw_spin_unlock_irqrestore(&desc->lock, flags);
/* Oops, that failed? */
- } while (status & IRQ_INPROGRESS);
+ } while (inprogress);
/*
* We made sure that no hardirq handler is running. Now verify
{
struct irq_desc *desc = irq_to_desc(irq);
- if (CHECK_IRQ_PER_CPU(desc->status) || !desc->irq_data.chip ||
- !desc->irq_data.chip->irq_set_affinity)
+ if (!desc || !irqd_can_balance(&desc->irq_data) ||
+ !desc->irq_data.chip || !desc->irq_data.chip->irq_set_affinity)
return 0;
return 1;
}
#ifdef CONFIG_GENERIC_PENDING_IRQ
-static inline bool irq_can_move_pcntxt(struct irq_desc *desc)
+static inline bool irq_can_move_pcntxt(struct irq_data *data)
{
- return desc->status & IRQ_MOVE_PCNTXT;
+ return irqd_can_move_in_process_context(data);
}
-static inline bool irq_move_pending(struct irq_desc *desc)
+static inline bool irq_move_pending(struct irq_data *data)
{
- return desc->status & IRQ_MOVE_PENDING;
+ return irqd_is_setaffinity_pending(data);
}
static inline void
irq_copy_pending(struct irq_desc *desc, const struct cpumask *mask)
cpumask_copy(mask, desc->pending_mask);
}
#else
-static inline bool irq_can_move_pcntxt(struct irq_desc *desc) { return true; }
-static inline bool irq_move_pending(struct irq_desc *desc) { return false; }
+static inline bool irq_can_move_pcntxt(struct irq_data *data) { return true; }
+static inline bool irq_move_pending(struct irq_data *data) { return false; }
static inline void
irq_copy_pending(struct irq_desc *desc, const struct cpumask *mask) { }
static inline void
irq_get_pending(struct cpumask *mask, struct irq_desc *desc) { }
#endif
-/**
- * irq_set_affinity - Set the irq affinity of a given irq
- * @irq: Interrupt to set affinity
- * @cpumask: cpumask
- *
- */
-int irq_set_affinity(unsigned int irq, const struct cpumask *mask)
+int __irq_set_affinity_locked(struct irq_data *data, const struct cpumask *mask)
{
- struct irq_desc *desc = irq_to_desc(irq);
- struct irq_chip *chip = desc->irq_data.chip;
- unsigned long flags;
+ struct irq_chip *chip = irq_data_get_irq_chip(data);
+ struct irq_desc *desc = irq_data_to_desc(data);
int ret = 0;
- if (!chip->irq_set_affinity)
+ if (!chip || !chip->irq_set_affinity)
return -EINVAL;
- raw_spin_lock_irqsave(&desc->lock, flags);
-
- if (irq_can_move_pcntxt(desc)) {
- ret = chip->irq_set_affinity(&desc->irq_data, mask, false);
+ if (irq_can_move_pcntxt(data)) {
+ ret = chip->irq_set_affinity(data, mask, false);
switch (ret) {
case IRQ_SET_MASK_OK:
- cpumask_copy(desc->irq_data.affinity, mask);
+ cpumask_copy(data->affinity, mask);
case IRQ_SET_MASK_OK_NOCOPY:
irq_set_thread_affinity(desc);
ret = 0;
}
} else {
- desc->status |= IRQ_MOVE_PENDING;
+ irqd_set_move_pending(data);
irq_copy_pending(desc, mask);
}
kref_get(&desc->affinity_notify->kref);
schedule_work(&desc->affinity_notify->work);
}
- desc->status |= IRQ_AFFINITY_SET;
- raw_spin_unlock_irqrestore(&desc->lock, flags);
+ irqd_set(data, IRQD_AFFINITY_SET);
+
return ret;
}
-int irq_set_affinity_hint(unsigned int irq, const struct cpumask *m)
+/**
+ * irq_set_affinity - Set the irq affinity of a given irq
+ * @irq: Interrupt to set affinity
+ * @mask: cpumask
+ *
+ */
+int irq_set_affinity(unsigned int irq, const struct cpumask *mask)
{
struct irq_desc *desc = irq_to_desc(irq);
unsigned long flags;
+ int ret;
if (!desc)
return -EINVAL;
raw_spin_lock_irqsave(&desc->lock, flags);
- desc->affinity_hint = m;
+ ret = __irq_set_affinity_locked(irq_desc_get_irq_data(desc), mask);
raw_spin_unlock_irqrestore(&desc->lock, flags);
+ return ret;
+}
+
+int irq_set_affinity_hint(unsigned int irq, const struct cpumask *m)
+{
+ unsigned long flags;
+ struct irq_desc *desc = irq_get_desc_lock(irq, &flags);
+ if (!desc)
+ return -EINVAL;
+ desc->affinity_hint = m;
+ irq_put_desc_unlock(desc, flags);
return 0;
}
EXPORT_SYMBOL_GPL(irq_set_affinity_hint);
goto out;
raw_spin_lock_irqsave(&desc->lock, flags);
- if (irq_move_pending(desc))
+ if (irq_move_pending(&desc->irq_data))
irq_get_pending(cpumask, desc);
else
cpumask_copy(cpumask, desc->irq_data.affinity);
static int
setup_affinity(unsigned int irq, struct irq_desc *desc, struct cpumask *mask)
{
- struct irq_chip *chip = get_irq_desc_chip(desc);
+ struct irq_chip *chip = irq_desc_get_chip(desc);
struct cpumask *set = irq_default_affinity;
int ret;
* Preserve an userspace affinity setup, but make sure that
* one of the targets is online.
*/
- if (desc->status & (IRQ_AFFINITY_SET)) {
+ if (irqd_has_set(&desc->irq_data, IRQD_AFFINITY_SET)) {
if (cpumask_intersects(desc->irq_data.affinity,
cpu_online_mask))
set = desc->irq_data.affinity;
else
- desc->status &= ~IRQ_AFFINITY_SET;
+ irqd_clear(&desc->irq_data, IRQD_AFFINITY_SET);
}
cpumask_and(mask, cpu_online_mask, set);
raw_spin_lock_irqsave(&desc->lock, flags);
ret = setup_affinity(irq, desc, mask);
- if (!ret)
- irq_set_thread_affinity(desc);
raw_spin_unlock_irqrestore(&desc->lock, flags);
return ret;
}
if (suspend) {
if (!desc->action || (desc->action->flags & IRQF_NO_SUSPEND))
return;
- desc->status |= IRQ_SUSPENDED;
+ desc->istate |= IRQS_SUSPENDED;
}
- if (!desc->depth++) {
- desc->status |= IRQ_DISABLED;
- desc->irq_data.chip->irq_disable(&desc->irq_data);
- }
+ if (!desc->depth++)
+ 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;
}
/**
*/
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);
*/
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);
void __enable_irq(struct irq_desc *desc, unsigned int irq, bool resume)
{
if (resume) {
- if (!(desc->status & IRQ_SUSPENDED)) {
+ if (!(desc->istate & IRQS_SUSPENDED)) {
if (!desc->action)
return;
if (!(desc->action->flags & IRQF_FORCE_RESUME))
/* Pretend that it got disabled ! */
desc->depth++;
}
- desc->status &= ~IRQ_SUSPENDED;
+ desc->istate &= ~IRQS_SUSPENDED;
}
switch (desc->depth) {
WARN(1, KERN_WARNING "Unbalanced enable for IRQ %d\n", irq);
break;
case 1: {
- unsigned int status = desc->status & ~IRQ_DISABLED;
-
- if (desc->status & IRQ_SUSPENDED)
+ if (desc->istate & IRQS_SUSPENDED)
goto err_out;
/* Prevent probing on this irq: */
- desc->status = status | IRQ_NOPROBE;
+ irq_settings_set_noprobe(desc);
+ irq_enable(desc);
check_irq_resend(desc, irq);
/* fall-through */
}
*/
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))
+ goto out;
- if (WARN(!desc->irq_data.chip || !desc->irq_data.chip->irq_enable,
- KERN_ERR "enable_irq before setup/request_irq: irq %u\n", irq))
- return;
-
- 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);
*/
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;
+ if (!desc)
+ return -EINVAL;
+
/* 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);
if (ret)
desc->wake_depth = 0;
else
- desc->status |= IRQ_WAKEUP;
+ irqd_set(&desc->irq_data, IRQD_WAKEUP_STATE);
}
} else {
if (desc->wake_depth == 0) {
if (ret)
desc->wake_depth = 1;
else
- desc->status &= ~IRQ_WAKEUP;
+ 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);
*/
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 (desc->status & IRQ_NOREQUEST)
- 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;
-}
-
-void compat_irq_chip_set_default_handler(struct irq_desc *desc)
-{
- /*
- * If the architecture still has not overriden
- * the flow handler then zap the default. This
- * should catch incorrect flow-type setting.
- */
- if (desc->handle_irq == &handle_bad_irq)
- desc->handle_irq = NULL;
+ 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,
unsigned long flags)
{
- int ret;
struct irq_chip *chip = desc->irq_data.chip;
+ int ret, unmask = 0;
if (!chip || !chip->irq_set_type) {
/*
return 0;
}
+ flags &= IRQ_TYPE_SENSE_MASK;
+
+ if (chip->flags & IRQCHIP_SET_TYPE_MASKED) {
+ if (!irqd_irq_masked(&desc->irq_data))
+ mask_irq(desc);
+ if (!irqd_irq_disabled(&desc->irq_data))
+ unmask = 1;
+ }
+
/* caller masked out all except trigger mode flags */
ret = chip->irq_set_type(&desc->irq_data, flags);
- if (ret)
+ switch (ret) {
+ case IRQ_SET_MASK_OK:
+ irqd_clear(&desc->irq_data, IRQD_TRIGGER_MASK);
+ irqd_set(&desc->irq_data, flags);
+
+ case IRQ_SET_MASK_OK_NOCOPY:
+ flags = irqd_get_trigger_type(&desc->irq_data);
+ irq_settings_set_trigger_mask(desc, flags);
+ irqd_clear(&desc->irq_data, IRQD_LEVEL);
+ irq_settings_clr_level(desc);
+ if (flags & IRQ_TYPE_LEVEL_MASK) {
+ irq_settings_set_level(desc);
+ irqd_set(&desc->irq_data, IRQD_LEVEL);
+ }
+
+ ret = 0;
+ break;
+ default:
pr_err("setting trigger mode %lu for irq %u failed (%pF)\n",
flags, irq, chip->irq_set_type);
- else {
- if (flags & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH))
- flags |= IRQ_LEVEL;
- /* note that IRQF_TRIGGER_MASK == IRQ_TYPE_SENSE_MASK */
- desc->status &= ~(IRQ_LEVEL | IRQ_TYPE_SENSE_MASK);
- desc->status |= flags;
-
- if (chip != desc->irq_data.chip)
- irq_chip_set_defaults(desc->irq_data.chip);
}
-
+ if (unmask)
+ unmask_irq(desc);
return ret;
}
* handler finished. unmask if the interrupt has not been disabled and
* is marked MASKED.
*/
-static void irq_finalize_oneshot(unsigned int irq, struct irq_desc *desc)
+static void irq_finalize_oneshot(struct irq_desc *desc,
+ struct irqaction *action, bool force)
{
+ if (!(desc->istate & IRQS_ONESHOT))
+ return;
again:
chip_bus_lock(desc);
raw_spin_lock_irq(&desc->lock);
* The thread is faster done than the hard interrupt handler
* on the other CPU. If we unmask the irq line then the
* interrupt can come in again and masks the line, leaves due
- * to IRQ_INPROGRESS and the irq line is masked forever.
+ * to IRQS_INPROGRESS and the irq line is masked forever.
+ *
+ * This also serializes the state of shared oneshot handlers
+ * versus "desc->threads_onehsot |= action->thread_mask;" in
+ * irq_wake_thread(). See the comment there which explains the
+ * serialization.
*/
- if (unlikely(desc->status & IRQ_INPROGRESS)) {
+ if (unlikely(irqd_irq_inprogress(&desc->irq_data))) {
raw_spin_unlock_irq(&desc->lock);
chip_bus_sync_unlock(desc);
cpu_relax();
goto again;
}
- if (!(desc->status & IRQ_DISABLED) && (desc->status & IRQ_MASKED)) {
- desc->status &= ~IRQ_MASKED;
- desc->irq_data.chip->irq_unmask(&desc->irq_data);
- }
+ /*
+ * Now check again, whether the thread should run. Otherwise
+ * we would clear the threads_oneshot bit of this thread which
+ * was just set.
+ */
+ if (!force && test_bit(IRQTF_RUNTHREAD, &action->thread_flags))
+ goto out_unlock;
+
+ desc->threads_oneshot &= ~action->thread_mask;
+
+ if (!desc->threads_oneshot && !irqd_irq_disabled(&desc->irq_data) &&
+ irqd_irq_masked(&desc->irq_data))
+ unmask_irq(desc);
+
+out_unlock:
raw_spin_unlock_irq(&desc->lock);
chip_bus_sync_unlock(desc);
}
#ifdef CONFIG_SMP
/*
- * Check whether we need to change the affinity of the interrupt thread.
+ * Check whether we need to chasnge the affinity of the interrupt thread.
*/
static void
irq_thread_check_affinity(struct irq_desc *desc, struct irqaction *action)
irq_thread_check_affinity(struct irq_desc *desc, struct irqaction *action) { }
#endif
+/*
+ * Interrupts which are not explicitely requested as threaded
+ * interrupts rely on the implicit bh/preempt disable of the hard irq
+ * context. So we need to disable bh here to avoid deadlocks and other
+ * side effects.
+ */
+static irqreturn_t
+irq_forced_thread_fn(struct irq_desc *desc, struct irqaction *action)
+{
+ irqreturn_t ret;
+
+ local_bh_disable();
+ ret = action->thread_fn(action->irq, action->dev_id);
+ irq_finalize_oneshot(desc, action, false);
+ local_bh_enable();
+ return ret;
+}
+
+/*
+ * Interrupts explicitely requested as threaded interupts want to be
+ * preemtible - many of them need to sleep and wait for slow busses to
+ * complete.
+ */
+static irqreturn_t irq_thread_fn(struct irq_desc *desc,
+ struct irqaction *action)
+{
+ irqreturn_t ret;
+
+ ret = action->thread_fn(action->irq, action->dev_id);
+ irq_finalize_oneshot(desc, action, false);
+ return ret;
+}
+
/*
* Interrupt handler thread
*/
};
struct irqaction *action = data;
struct irq_desc *desc = irq_to_desc(action->irq);
- int wake, oneshot = desc->status & IRQ_ONESHOT;
+ irqreturn_t (*handler_fn)(struct irq_desc *desc,
+ struct irqaction *action);
+ int wake;
+
+ if (force_irqthreads & test_bit(IRQTF_FORCED_THREAD,
+ &action->thread_flags))
+ handler_fn = irq_forced_thread_fn;
+ else
+ handler_fn = irq_thread_fn;
sched_setscheduler(current, SCHED_FIFO, ¶m);
current->irqaction = action;
atomic_inc(&desc->threads_active);
raw_spin_lock_irq(&desc->lock);
- if (unlikely(desc->status & IRQ_DISABLED)) {
+ if (unlikely(irqd_irq_disabled(&desc->irq_data))) {
/*
* CHECKME: We might need a dedicated
* IRQ_THREAD_PENDING flag here, which
* retriggers the thread in check_irq_resend()
- * but AFAICT IRQ_PENDING should be fine as it
+ * but AFAICT IRQS_PENDING should be fine as it
* retriggers the interrupt itself --- tglx
*/
- desc->status |= IRQ_PENDING;
+ desc->istate |= IRQS_PENDING;
raw_spin_unlock_irq(&desc->lock);
} else {
- raw_spin_unlock_irq(&desc->lock);
-
- action->thread_fn(action->irq, action->dev_id);
+ irqreturn_t action_ret;
- if (oneshot)
- irq_finalize_oneshot(action->irq, desc);
+ raw_spin_unlock_irq(&desc->lock);
+ action_ret = handler_fn(desc, action);
+ if (!noirqdebug)
+ note_interrupt(action->irq, desc, action_ret);
}
wake = atomic_dec_and_test(&desc->threads_active);
wake_up(&desc->wait_for_threads);
}
+ /* Prevent a stale desc->threads_oneshot */
+ irq_finalize_oneshot(desc, action, true);
+
/*
* Clear irqaction. Otherwise exit_irq_thread() would make
* fuzz about an active irq thread going into nirvana.
void exit_irq_thread(void)
{
struct task_struct *tsk = current;
+ struct irq_desc *desc;
if (!tsk->irqaction)
return;
"exiting task \"%s\" (%d) is an active IRQ thread (irq %d)\n",
tsk->comm ? tsk->comm : "", tsk->pid, tsk->irqaction->irq);
+ desc = irq_to_desc(tsk->irqaction->irq);
+
+ /*
+ * Prevent a stale desc->threads_oneshot. Must be called
+ * before setting the IRQTF_DIED flag.
+ */
+ irq_finalize_oneshot(desc, tsk->irqaction, true);
+
/*
* Set the THREAD DIED flag to prevent further wakeups of the
* soon to be gone threaded handler.
set_bit(IRQTF_DIED, &tsk->irqaction->flags);
}
+static void irq_setup_forced_threading(struct irqaction *new)
+{
+ if (!force_irqthreads)
+ return;
+ if (new->flags & (IRQF_NO_THREAD | IRQF_PERCPU | IRQF_ONESHOT))
+ return;
+
+ new->flags |= IRQF_ONESHOT;
+
+ if (!new->thread_fn) {
+ set_bit(IRQTF_FORCED_THREAD, &new->thread_flags);
+ new->thread_fn = new->handler;
+ new->handler = irq_default_primary_handler;
+ }
+}
+
/*
* Internal function to register an irqaction - typically used to
* allocate special interrupts that are part of the architecture.
{
struct irqaction *old, **old_ptr;
const char *old_name = NULL;
- unsigned long flags;
+ unsigned long flags, thread_mask = 0;
int ret, nested, shared = 0;
cpumask_var_t mask;
rand_initialize_irq(irq);
}
- /* Oneshot interrupts are not allowed with shared */
- if ((new->flags & IRQF_ONESHOT) && (new->flags & IRQF_SHARED))
- return -EINVAL;
-
/*
* Check whether the interrupt nests into another interrupt
* thread.
*/
- nested = desc->status & IRQ_NESTED_THREAD;
+ nested = irq_settings_is_nested_thread(desc);
if (nested) {
if (!new->thread_fn)
return -EINVAL;
* dummy function which warns when called.
*/
new->handler = irq_nested_primary_handler;
+ } else {
+ if (irq_settings_can_thread(desc))
+ irq_setup_forced_threading(new);
}
/*
* Can't share interrupts unless both agree to and are
* the same type (level, edge, polarity). So both flag
* fields must have IRQF_SHARED set and the bits which
- * set the trigger type must match.
+ * set the trigger type must match. Also all must
+ * agree on ONESHOT.
*/
if (!((old->flags & new->flags) & IRQF_SHARED) ||
- ((old->flags ^ new->flags) & IRQF_TRIGGER_MASK)) {
+ ((old->flags ^ new->flags) & IRQF_TRIGGER_MASK) ||
+ ((old->flags ^ new->flags) & IRQF_ONESHOT)) {
old_name = old->name;
goto mismatch;
}
-#if defined(CONFIG_IRQ_PER_CPU)
/* All handlers must agree on per-cpuness */
if ((old->flags & IRQF_PERCPU) !=
(new->flags & IRQF_PERCPU))
goto mismatch;
-#endif
/* add new interrupt at end of irq queue */
do {
+ thread_mask |= old->thread_mask;
old_ptr = &old->next;
old = *old_ptr;
} while (old);
shared = 1;
}
- if (!shared) {
- irq_chip_set_defaults(desc->irq_data.chip);
+ /*
+ * Setup the thread mask for this irqaction. Unlikely to have
+ * 32 resp 64 irqs sharing one line, but who knows.
+ */
+ if (new->flags & IRQF_ONESHOT && thread_mask == ~0UL) {
+ ret = -EBUSY;
+ goto out_mask;
+ }
+ new->thread_mask = 1 << ffz(thread_mask);
+ if (!shared) {
init_waitqueue_head(&desc->wait_for_threads);
/* Setup the type (level, edge polarity) if configured: */
if (ret)
goto out_mask;
- } else
- compat_irq_chip_set_default_handler(desc);
-#if defined(CONFIG_IRQ_PER_CPU)
- if (new->flags & IRQF_PERCPU)
- desc->status |= IRQ_PER_CPU;
-#endif
+ }
- desc->status &= ~(IRQ_AUTODETECT | IRQ_WAITING | IRQ_ONESHOT |
- IRQ_INPROGRESS | IRQ_SPURIOUS_DISABLED);
+ desc->istate &= ~(IRQS_AUTODETECT | IRQS_SPURIOUS_DISABLED | \
+ IRQS_ONESHOT | IRQS_WAITING);
+ irqd_clear(&desc->irq_data, IRQD_IRQ_INPROGRESS);
+
+ if (new->flags & IRQF_PERCPU) {
+ irqd_set(&desc->irq_data, IRQD_PER_CPU);
+ irq_settings_set_per_cpu(desc);
+ }
if (new->flags & IRQF_ONESHOT)
- desc->status |= IRQ_ONESHOT;
+ desc->istate |= IRQS_ONESHOT;
- if (!(desc->status & IRQ_NOAUTOEN)) {
- desc->depth = 0;
- desc->status &= ~IRQ_DISABLED;
- desc->irq_data.chip->irq_startup(&desc->irq_data);
- } else
+ if (irq_settings_can_autoenable(desc))
+ irq_startup(desc);
+ else
/* Undo nested disables: */
desc->depth = 1;
/* Exclude IRQ from balancing if requested */
- if (new->flags & IRQF_NOBALANCING)
- desc->status |= IRQ_NO_BALANCING;
+ if (new->flags & IRQF_NOBALANCING) {
+ irq_settings_set_no_balancing(desc);
+ irqd_set(&desc->irq_data, IRQD_NO_BALANCING);
+ }
/* Set default affinity mask once everything is setup */
setup_affinity(irq, desc, mask);
- } else if ((new->flags & IRQF_TRIGGER_MASK)
- && (new->flags & IRQF_TRIGGER_MASK)
- != (desc->status & IRQ_TYPE_SENSE_MASK)) {
- /* hope the handler works with the actual trigger mode... */
- pr_warning("IRQ %d uses trigger mode %d; requested %d\n",
- irq, (int)(desc->status & IRQ_TYPE_SENSE_MASK),
- (int)(new->flags & IRQF_TRIGGER_MASK));
+ } else if (new->flags & IRQF_TRIGGER_MASK) {
+ unsigned int nmsk = new->flags & IRQF_TRIGGER_MASK;
+ unsigned int omsk = irq_settings_get_trigger_mask(desc);
+
+ if (nmsk != omsk)
+ /* hope the handler works with current trigger mode */
+ pr_warning("IRQ %d uses trigger mode %u; requested %u\n",
+ irq, nmsk, omsk);
}
new->irq = irq;
* Check whether we disabled the irq via the spurious handler
* before. Reenable it and give it another chance.
*/
- if (shared && (desc->status & IRQ_SPURIOUS_DISABLED)) {
- desc->status &= ~IRQ_SPURIOUS_DISABLED;
+ if (shared && (desc->istate & IRQS_SPURIOUS_DISABLED)) {
+ desc->istate &= ~IRQS_SPURIOUS_DISABLED;
__enable_irq(desc, irq, false);
}
register_irq_proc(irq, desc);
new->dir = NULL;
register_handler_proc(irq, new);
+ free_cpumask_var(mask);
return 0;
ret = -EBUSY;
out_mask:
+ raw_spin_unlock_irqrestore(&desc->lock, flags);
free_cpumask_var(mask);
out_thread:
- raw_spin_unlock_irqrestore(&desc->lock, flags);
if (new->thread) {
struct task_struct *t = new->thread;
#endif
/* If this was the last handler, shut down the IRQ line: */
- if (!desc->action) {
- desc->status |= IRQ_DISABLED;
- if (desc->irq_data.chip->irq_shutdown)
- desc->irq_data.chip->irq_shutdown(&desc->irq_data);
- else
- desc->irq_data.chip->irq_disable(&desc->irq_data);
- }
+ if (!desc->action)
+ irq_shutdown(desc);
#ifdef CONFIG_SMP
/* make sure affinity_hint is cleaned up */
if (!desc)
return -EINVAL;
- if (desc->status & IRQ_NOREQUEST)
+ if (!irq_settings_can_request(desc))
return -EINVAL;
if (!handler) {
if (!desc)
return -EINVAL;
- if (desc->status & IRQ_NESTED_THREAD) {
+ if (irq_settings_is_nested_thread(desc)) {
ret = request_threaded_irq(irq, NULL, handler,
flags, name, dev_id);
return !ret ? IRQC_IS_NESTED : ret;