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[IA64] SGI Altix : fix a force_interrupt bug on altix 

If the interrupt has been disabled, don't call the force_interrupt provider.
Doing so can result in an infinite runaway interrupt loop.

Signed-off-by: Mike Habeck <habeck@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Mike Habeck 2007-08-13 17:13:08 -05:00 committed by Tony Luck
parent 709ae93091
commit 352b0ef50d
1 changed files with 4 additions and 1 deletions
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5
arch/ia64/sn/kernel/irq.c
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@ -405,7 +405,10 @@ sn_call_force_intr_provider(struct sn_irq_info *sn_irq_info)
struct sn_pcibus_provider *pci_provider;
pci_provider = sn_pci_provider[sn_irq_info->irq_bridge_type];
if (pci_provider && pci_provider->force_interrupt)
/* Don't force an interrupt if the irq has been disabled */
if (!(irq_desc[sn_irq_info->irq_irq].status & IRQ_DISABLED) &&
pci_provider && pci_provider->force_interrupt)
(*pci_provider->force_interrupt)(sn_irq_info);
}