diff options
| author | Grant Likely <grant.likely@linaro.org> | 2013-05-29 03:10:52 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2013-05-29 10:57:11 +0200 |
| commit | e8bd834f73714378ef110a64287db1b77033c8da (patch) | |
| tree | 344493bc19c638aca611e3b5c7e44e234288685a /kernel | |
| parent | 088f40b7b027dad6519712ff224a5798dd62a204 (diff) | |
| download | linux-e8bd834f73714378ef110a64287db1b77033c8da.tar.bz2 | |
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')
| -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, idx = hw_irq % dgc->irqs_per_chip; + if (test_bit(idx, &gc->unused)) + return -ENOTSUPP; + if (test_bit(idx, &gc->installed)) return -EBUSY; |