linux-4.4.1/request_any_context_irq()

参照元†

• linux-4.4.1/snd_soc_jack_add_gpios()

説明†

• パス: linux-4.4.1/kernel/irq/manage.c

• FIXME: これは何？
  • 説明

引数†

• unsigned int irq
• irq_handler_t handler
  • linux-4.4.1/irq_handler_t
• unsigned long flags
• const char *name
• void *dev_id

返り値†

• int

参考†

実装†

/**
 *      request_any_context_irq - allocate an interrupt line
 *      @irq: Interrupt line to allocate
 *      @handler: Function to be called when the IRQ occurs.
 *                Threaded handler for threaded interrupts.
 *      @flags: Interrupt type flags
 *      @name: An ascii name for the claiming device
 *      @dev_id: A cookie passed back to the handler function
 *
 *      This call allocates interrupt resources and enables the
 *      interrupt line and IRQ handling. It selects either a
 *      hardirq or threaded handling method depending on the
 *      context.
 *
 *      On failure, it returns a negative value. On success,
 *      it returns either IRQC_IS_HARDIRQ or IRQC_IS_NESTED.
 */
int request_any_context_irq(unsigned int irq, irq_handler_t handler,
                            unsigned long flags, const char *name, void *dev_id)
{
        struct irq_desc *desc = irq_to_desc(irq);
        int ret;

• • linux-4.4.1/irq_desc
  • linux-4.4.1/irq_to_desc()

        if (!desc)
                return -EINVAL;

        if (irq_settings_is_nested_thread(desc)) {

• • linux-4.4.1/irq_settings_is_nested_thread()

                ret = request_threaded_irq(irq, NULL, handler,
                                           flags, name, dev_id);
                return !ret ? IRQC_IS_NESTED : ret;

• • linux-4.4.1/request_threaded_irq()

        }

        ret = request_irq(irq, handler, flags, name, dev_id);
        return !ret ? IRQC_IS_HARDIRQ : ret;

• • linux-4.4.1/request_irq()

}
EXPORT_SYMBOL_GPL(request_any_context_irq);

• • linux-4.4.1/EXPORT_SYMBOL_GPL()

コメント†

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• katsuhiro

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