Messages in this thread Patch in this message |  | | | From | stefano.stabellini@eu ... | | Subject | [PATCH 07/12] Fix find_unbound_irq in presence of ioapic irqs. | | Date | Thu, 3 Jun 2010 14:10:40 +0100 |
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From: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Don't break the assumption that the first 16 irqs are ISA irqs; make sure that the irq is actually free before using it.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> --- drivers/xen/events.c | 11 ++++++++++- 1 files changed, 10 insertions(+), 1 deletions(-) diff --git a/drivers/xen/events.c b/drivers/xen/events.c index 4bd0ea3..b233564 100644 --- a/drivers/xen/events.c +++ b/drivers/xen/events.c @@ -340,9 +340,18 @@ static int find_unbound_irq(void) int irq; struct irq_desc *desc; - for (irq = 0; irq < nr_irqs; irq++) + for (irq = 0; irq < nr_irqs; irq++) { + desc = irq_to_desc(irq); + /* only 0->15 have init'd desc; handle irq > 16 */ + if (desc == NULL) + break; + if (desc->chip == &no_irq_chip) + break; + if (desc->chip != &xen_dynamic_chip) + continue; if (irq_info[irq].type == IRQT_UNBOUND) break; + } if (irq == nr_irqs) panic("No available IRQ to bind to: increase nr_irqs!\n"); -- 1.7.0.4
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