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[POWERPC] Split virq setup logic out into irq_setup_virq()

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A future patch will need the logic at the end of irq_create_mapping()
which setups a virq and installs it in the irq_map. So split it out
into a new function irq_setup_virq().

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Michael Ellerman 2007-06-04 22:59:59 +10:00 committed by Paul Mackerras
parent 35923f12e4
commit 6fde40f3f1
1 changed files with 21 additions and 11 deletions
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32
arch/powerpc/kernel/irq.c
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@ -596,6 +596,25 @@ static void irq_radix_rdunlock(unsigned long flags)
local_irq_restore(flags);
}
static int irq_setup_virq(struct irq_host *host, unsigned int virq,
irq_hw_number_t hwirq)
{
/* Clear IRQ_NOREQUEST flag */
get_irq_desc(virq)->status &= ~IRQ_NOREQUEST;
/* map it */
smp_wmb();
irq_map[virq].hwirq = hwirq;
smp_mb();
if (host->ops->map(host, virq, hwirq)) {
pr_debug("irq: -> mapping failed, freeing\n");
irq_free_virt(virq, 1);
return -1;
}
return 0;
}
unsigned int irq_create_mapping(struct irq_host *host,
irq_hw_number_t hwirq)
@ -644,18 +663,9 @@ unsigned int irq_create_mapping(struct irq_host *host,
}
pr_debug("irq: -> obtained virq %d\n", virq);
/* Clear IRQ_NOREQUEST flag */
get_irq_desc(virq)->status &= ~IRQ_NOREQUEST;
/* map it */
smp_wmb();
irq_map[virq].hwirq = hwirq;
smp_mb();
if (host->ops->map(host, virq, hwirq)) {
pr_debug("irq: -> mapping failed, freeing\n");
irq_free_virt(virq, 1);
if (irq_setup_virq(host, virq, hwirq))
return NO_IRQ;
}
return virq;
}
EXPORT_SYMBOL_GPL(irq_create_mapping);