提交 f0c450ea 编写于 作者: S Sebastian Frias 提交者: Thomas Gleixner

genirq/generic_chip: Get rid of code duplication

irq_map_generic_chip() contains about the same code as
irq_get_domain_generic_chip() except for the return values.

Split out the irq_get_domain_generic_chip() implementation so it can be
reused.

[ tglx: Removed the extra churn in irq_get_domain_generic_chip() callers
  	and massaged changelog ]
Signed-off-by: NSebastian Frias <sf84@laposte.net>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Mason <slash.tmp@free.fr>
Cc: Jason Cooper <jason@lakedaemon.net>
Link: http://lkml.kernel.org/r/579F5C69.8070006@laposte.netSigned-off-by: NThomas Gleixner <tglx@linutronix.de>
上级 48e0fba8
......@@ -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;
......
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