diff options
author | Grant Likely <grant.likely@linaro.org> | 2013-05-28 22:10:52 -0400 |
---|---|---|
committer | Thomas Gleixner <tglx@linutronix.de> | 2013-05-29 04:57:11 -0400 |
commit | e8bd834f73714378ef110a64287db1b77033c8da (patch) | |
tree | 344493bc19c638aca611e3b5c7e44e234288685a /kernel/irq | |
parent | 088f40b7b027dad6519712ff224a5798dd62a204 (diff) |
genirq: irqchip: Add mask to block out invalid irqs
Some controllers have irqs that aren't wired up and must never be used.
For the generic chip attached to an irq_domain this provides a mask that
can be used to block out particular irqs so that they never get mapped.
Signed-off-by: Grant Likely <grant.likely@linaro.org>
Link: http://lkml.kernel.org/r/1369793454-19197-2-git-send-email-grant.likely@linaro.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/irq')
-rw-r--r-- | kernel/irq/generic-chip.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/irq/generic-chip.c b/kernel/irq/generic-chip.c index 8743d62fded7..95575d8d5392 100644 --- a/kernel/irq/generic-chip.c +++ b/kernel/irq/generic-chip.c | |||
@@ -359,6 +359,9 @@ static int irq_map_generic_chip(struct irq_domain *d, unsigned int virq, | |||
359 | 359 | ||
360 | idx = hw_irq % dgc->irqs_per_chip; | 360 | idx = hw_irq % dgc->irqs_per_chip; |
361 | 361 | ||
362 | if (test_bit(idx, &gc->unused)) | ||
363 | return -ENOTSUPP; | ||
364 | |||
362 | if (test_bit(idx, &gc->installed)) | 365 | if (test_bit(idx, &gc->installed)) |
363 | return -EBUSY; | 366 | return -EBUSY; |
364 | 367 | ||