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| author | Stefano Stabellini <stefano.stabellini@eu.citrix.com> | 2010-05-14 12:41:20 +0100 |
|---|---|---|
| committer | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2010-07-22 16:46:30 -0700 |
| commit | 99ad198c4978036bb9f7ebd11618b225b77046da (patch) | |
| tree | d236698e6980dc8909aeb0cbdfbc8d84b2abbef8 /drivers/xen | |
| parent | 016b6f5fe8398b0291cece60b749d7c930a2e09c (diff) | |
| download | linux-99ad198c4978036bb9f7ebd11618b225b77046da.tar.gz linux-99ad198c4978036bb9f7ebd11618b225b77046da.tar.bz2 linux-99ad198c4978036bb9f7ebd11618b225b77046da.zip | |
xen: Fix find_unbound_irq in presence of ioapic irqs.
Don't break the assumption that the first 16 irqs are ISA irqs;
make sure that the irq is actually free before using it.
Use dynamic_irq_init_keep_chip_data instead of
dynamic_irq_init so that chip_data is not NULL (a NULL chip_data breaks
setup_vector_irq).
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Diffstat (limited to 'drivers/xen')
| -rw-r--r-- | drivers/xen/events.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/xen/events.c b/drivers/xen/events.c index 7c64473c9f3f..b5a254e9aebe 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"); @@ -351,7 +360,7 @@ static int find_unbound_irq(void) if (WARN_ON(desc == NULL)) return -1; - dynamic_irq_init(irq); + dynamic_irq_init_keep_chip_data(irq); return irq; } |