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-rw-r--r--kernel/irq/manage.c86
1 files changed, 0 insertions, 86 deletions
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index c4b7ed1cebf7..8b961adc3bd2 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -482,89 +482,3 @@ int request_irq(unsigned int irq, irq_handler_t handler,
482 return retval; 482 return retval;
483} 483}
484EXPORT_SYMBOL(request_irq); 484EXPORT_SYMBOL(request_irq);
485
486/*
487 * Device resource management aware IRQ request/free implementation.
488 */
489struct irq_devres {
490 unsigned int irq;
491 void *dev_id;
492};
493
494static void devm_irq_release(struct device *dev, void *res)
495{
496 struct irq_devres *this = res;
497
498 free_irq(this->irq, this->dev_id);
499}
500
501static int devm_irq_match(struct device *dev, void *res, void *data)
502{
503 struct irq_devres *this = res, *match = data;
504
505 return this->irq == match->irq && this->dev_id == match->dev_id;
506}
507
508/**
509 * devm_request_irq - allocate an interrupt line for a managed device
510 * @dev: device to request interrupt for
511 * @irq: Interrupt line to allocate
512 * @handler: Function to be called when the IRQ occurs
513 * @irqflags: Interrupt type flags
514 * @devname: An ascii name for the claiming device
515 * @dev_id: A cookie passed back to the handler function
516 *
517 * Except for the extra @dev argument, this function takes the
518 * same arguments and performs the same function as
519 * request_irq(). IRQs requested with this function will be
520 * automatically freed on driver detach.
521 *
522 * If an IRQ allocated with this function needs to be freed
523 * separately, dev_free_irq() must be used.
524 */
525int devm_request_irq(struct device *dev, unsigned int irq,
526 irq_handler_t handler, unsigned long irqflags,
527 const char *devname, void *dev_id)
528{
529 struct irq_devres *dr;
530 int rc;
531
532 dr = devres_alloc(devm_irq_release, sizeof(struct irq_devres),
533 GFP_KERNEL);
534 if (!dr)
535 return -ENOMEM;
536
537 rc = request_irq(irq, handler, irqflags, devname, dev_id);
538 if (rc) {
539 kfree(dr);
540 return rc;
541 }
542
543 dr->irq = irq;
544 dr->dev_id = dev_id;
545 devres_add(dev, dr);
546
547 return 0;
548}
549EXPORT_SYMBOL(devm_request_irq);
550
551/**
552 * devm_free_irq - free an interrupt
553 * @dev: device to free interrupt for
554 * @irq: Interrupt line to free
555 * @dev_id: Device identity to free
556 *
557 * Except for the extra @dev argument, this function takes the
558 * same arguments and performs the same function as free_irq().
559 * This function instead of free_irq() should be used to manually
560 * free IRQs allocated with dev_request_irq().
561 */
562void devm_free_irq(struct device *dev, unsigned int irq, void *dev_id)
563{
564 struct irq_devres match_data = { irq, dev_id };
565
566 free_irq(irq, dev_id);
567 WARN_ON(devres_destroy(dev, devm_irq_release, devm_irq_match,
568 &match_data));
569}
570EXPORT_SYMBOL(devm_free_irq);