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irq: irqdomain: Change irq_domain_add to detect errors

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It should not be valid to add an irq_domain with a logical irq
range that overlaps with another already registered to the
system. Return an error on such an occurrence.

This change also inherently sorts the irq_domains by logical
irq_base as they are added.

Change-Id: Idef697dbe4584d783703d053fbf09f1b17e62ab0
Signed-off-by: Michael Bohan <mbohan@codeaurora.org>
This commit is contained in:
Michael Bohan
2012-01-11 11:45:16 -08:00
parent b8635c3f53
commit 6f4df41a29
2 changed files with 32 additions and 5 deletions
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2
include/linux/irqdomain.h
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@@ -89,7 +89,7 @@ static inline unsigned int irq_domain_to_irq(struct irq_domain *d,
hw < d->hwirq_base + d->nr_irq; \
hw++, irq = irq_domain_to_irq(d, hw))
extern void irq_domain_add(struct irq_domain *domain);
extern int irq_domain_add(struct irq_domain *domain);
extern void irq_domain_del(struct irq_domain *domain);
extern void irq_domain_register(struct irq_domain *domain);
extern void irq_domain_register_irq(struct irq_domain *domain, int hwirq);