}
EXPORT_SYMBOL(synchronize_irq);
+/**
+ * irq_can_set_affinity - Check if the affinity of a given irq can be set
+ * @irq: Interrupt to check
+ *
+ */
+int irq_can_set_affinity(unsigned int irq)
+{
+ struct irq_desc *desc = irq_desc + irq;
+
+ if (CHECK_IRQ_PER_CPU(desc->status) || !desc->chip ||
+ !desc->chip->set_affinity)
+ return 0;
+
+ return 1;
+}
+
+/**
+ * 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, cpumask_t cpumask)
+{
+ struct irq_desc *desc = irq_desc + irq;
+
+ if (!desc->chip->set_affinity)
+ return -EINVAL;
+
+ set_balance_irq_affinity(irq, cpumask);
+
+#ifdef CONFIG_GENERIC_PENDING_IRQ
+ set_pending_irq(irq, cpumask);
+#else
+ desc->affinity = cpumask;
+ desc->chip->set_affinity(irq, cpumask);
+#endif
+ return 0;
+}
+
#endif
/**
if (new->flags & IRQF_PERCPU)
desc->status |= IRQ_PER_CPU;
#endif
+ /* Exclude IRQ from balancing */
+ if (new->flags & IRQF_NOBALANCING)
+ desc->status |= IRQ_NO_BALANCING;
+
if (!shared) {
irq_chip_set_defaults(desc->chip);
return 0;
mismatch:
+#ifdef CONFIG_DEBUG_SHIRQ
if (!(new->flags & IRQF_PROBE_SHARED)) {
printk(KERN_ERR "IRQ handler type mismatch for IRQ %d\n", irq);
if (old_name)
printk(KERN_ERR "current handler: %s\n", old_name);
dump_stack();
}
+#endif
spin_unlock_irqrestore(&desc->lock, flags);
return -EBUSY;
}
struct irq_desc *desc;
struct irqaction **p;
unsigned long flags;
+ irqreturn_t (*handler)(int, void *) = NULL;
WARN_ON(in_interrupt());
if (irq >= NR_IRQS)
/* Make sure it's not being used on another CPU */
synchronize_irq(irq);
+ if (action->flags & IRQF_SHARED)
+ handler = action->handler;
kfree(action);
return;
}
spin_unlock_irqrestore(&desc->lock, flags);
return;
}
+#ifdef CONFIG_DEBUG_SHIRQ
+ if (handler) {
+ /*
+ * It's a shared IRQ -- the driver ought to be prepared for it
+ * to happen even now it's being freed, so let's make sure....
+ * We do this after actually deregistering it, to make sure that
+ * a 'real' IRQ doesn't run in parallel with our fake
+ */
+ handler(irq, dev_id);
+ }
+#endif
}
EXPORT_SYMBOL(free_irq);
/*
* Lockdep wants atomic interrupt handlers:
*/
- irqflags |= SA_INTERRUPT;
+ irqflags |= IRQF_DISABLED;
#endif
/*
* Sanity-check: shared interrupts must pass in a real dev-ID,
select_smp_affinity(irq);
+#ifdef CONFIG_DEBUG_SHIRQ
+ if (irqflags & IRQF_SHARED) {
+ /*
+ * It's a shared IRQ -- the driver ought to be prepared for it
+ * to happen immediately, so let's make sure....
+ * We do this before actually registering it, to make sure that
+ * a 'real' IRQ doesn't run in parallel with our fake
+ */
+ if (irqflags & IRQF_DISABLED) {
+ unsigned long flags;
+
+ local_irq_save(flags);
+ handler(irq, dev_id);
+ local_irq_restore(flags);
+ } else
+ handler(irq, dev_id);
+ }
+#endif
+
retval = setup_irq(irq, action);
if (retval)
kfree(action);
return retval;
}
EXPORT_SYMBOL(request_irq);
-
-/*
- * Device resource management aware IRQ request/free implementation.
- */
-struct irq_devres {
- unsigned int irq;
- void *dev_id;
-};
-
-static void devm_irq_release(struct device *dev, void *res)
-{
- struct irq_devres *this = res;
-
- free_irq(this->irq, this->dev_id);
-}
-
-static int devm_irq_match(struct device *dev, void *res, void *data)
-{
- struct irq_devres *this = res, *match = data;
-
- return this->irq == match->irq && this->dev_id == match->dev_id;
-}
-
-/**
- * devm_request_irq - allocate an interrupt line for a managed device
- * @dev: device to request interrupt for
- * @irq: Interrupt line to allocate
- * @handler: Function to be called when the IRQ occurs
- * @irqflags: Interrupt type flags
- * @devname: An ascii name for the claiming device
- * @dev_id: A cookie passed back to the handler function
- *
- * Except for the extra @dev argument, this function takes the
- * same arguments and performs the same function as
- * request_irq(). IRQs requested with this function will be
- * automatically freed on driver detach.
- *
- * If an IRQ allocated with this function needs to be freed
- * separately, dev_free_irq() must be used.
- */
-int devm_request_irq(struct device *dev, unsigned int irq,
- irq_handler_t handler, unsigned long irqflags,
- const char *devname, void *dev_id)
-{
- struct irq_devres *dr;
- int rc;
-
- dr = devres_alloc(devm_irq_release, sizeof(struct irq_devres),
- GFP_KERNEL);
- if (!dr)
- return -ENOMEM;
-
- rc = request_irq(irq, handler, irqflags, devname, dev_id);
- if (rc) {
- kfree(dr);
- return rc;
- }
-
- dr->irq = irq;
- dr->dev_id = dev_id;
- devres_add(dev, dr);
-
- return 0;
-}
-EXPORT_SYMBOL(devm_request_irq);
-
-/**
- * devm_free_irq - free an interrupt
- * @dev: device to free interrupt for
- * @irq: Interrupt line to free
- * @dev_id: Device identity to free
- *
- * Except for the extra @dev argument, this function takes the
- * same arguments and performs the same function as free_irq().
- * This function instead of free_irq() should be used to manually
- * free IRQs allocated with dev_request_irq().
- */
-void devm_free_irq(struct device *dev, unsigned int irq, void *dev_id)
-{
- struct irq_devres match_data = { irq, dev_id };
-
- free_irq(irq, dev_id);
- WARN_ON(devres_destroy(dev, devm_irq_release, devm_irq_match,
- &match_data));
-}
-EXPORT_SYMBOL(devm_free_irq);
projects / linux-2.6-omap-h63xx.git / blobdiff