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powerpc: Print information about mapping hw irqs to virtual irqs

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The irq remapping layer seems to cause some confusion when people
see a different irq number in /proc/interrupts vs the one they
request in their driver or DTS.

So have the irq remapping layer print out a message when we map an
irq. The message is only printed the first time the irq is mapped,
and it's KERN_DEBUG so most people won't see it.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Michael Ellerman 2009-04-05 16:05:02 +00:00 committed by Paul Mackerras
parent cb93d568e1
commit c7d07fdd5a
1 changed files with 3 additions and 1 deletions
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4
arch/powerpc/kernel/irq.c
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@ -672,11 +672,13 @@ unsigned int irq_create_mapping(struct irq_host *host,
return NO_IRQ;
}
}
pr_debug("irq: -> obtained virq %d\n", virq);
if (irq_setup_virq(host, virq, hwirq))
return NO_IRQ;
printk(KERN_DEBUG "irq: irq %lu on host %s mapped to virtual irq %u\n",
hwirq, host->of_node ? host->of_node->full_name : "null", virq);
return virq;
}
EXPORT_SYMBOL_GPL(irq_create_mapping);