diff options
| -rw-r--r-- | kernel/irq/generic-chip.c | 34 |
1 files changed, 19 insertions, 15 deletions
diff --git a/kernel/irq/generic-chip.c b/kernel/irq/generic-chip.c index 5fbb94b077b3..11ad73b39d2e 100644 --- a/kernel/irq/generic-chip.c +++ b/kernel/irq/generic-chip.c @@ -328,6 +328,20 @@ int irq_alloc_domain_generic_chips(struct irq_domain *d, int irqs_per_chip, } EXPORT_SYMBOL_GPL(irq_alloc_domain_generic_chips); +static struct irq_chip_generic * +__irq_get_domain_generic_chip(struct irq_domain *d, unsigned int hw_irq) +{ + struct irq_domain_chip_generic *dgc = d->gc; + int idx; + + if (!dgc) + return ERR_PTR(-ENODEV); + idx = hw_irq / dgc->irqs_per_chip; + if (idx >= dgc->num_chips) + return ERR_PTR(-EINVAL); + return dgc->gc[idx]; +} + /** * irq_get_domain_generic_chip - Get a pointer to the generic chip of a hw_irq * @d: irq domain pointer @@ -336,15 +350,9 @@ EXPORT_SYMBOL_GPL(irq_alloc_domain_generic_chips); struct irq_chip_generic * irq_get_domain_generic_chip(struct irq_domain *d, unsigned int hw_irq) { - struct irq_domain_chip_generic *dgc = d->gc; - int idx; + struct irq_chip_generic *gc = __irq_get_domain_generic_chip(d, hw_irq); - if (!dgc) - return NULL; - idx = hw_irq / dgc->irqs_per_chip; - if (idx >= dgc->num_chips) - return NULL; - return dgc->gc[idx]; + return !IS_ERR(gc) ? gc : NULL; } EXPORT_SYMBOL_GPL(irq_get_domain_generic_chip); @@ -368,13 +376,9 @@ int irq_map_generic_chip(struct irq_domain *d, unsigned int virq, unsigned long flags; int idx; - if (!d->gc) - return -ENODEV; - - idx = hw_irq / dgc->irqs_per_chip; - if (idx >= dgc->num_chips) - return -EINVAL; - gc = dgc->gc[idx]; + gc = __irq_get_domain_generic_chip(d, hw_irq); + if (IS_ERR(gc)) + return PTR_ERR(gc); idx = hw_irq % dgc->irqs_per_chip; |