Messages in this thread | | | Date | Wed, 31 May 2006 01:14:46 +0200 | From | Ingo Molnar <> | Subject | Re: 2.6.17-rc5-mm1 |
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* Thomas Gleixner <tglx@linutronix.de> wrote:
> CC'ed Ben, who is hacking on msi, IIRC > > On Wed, 2006-05-31 at 00:58 +0200, Ingo Molnar wrote: > > > > > > > > does MSI much with the irq_desc[] separately perhaps, clearing > > > > handle_irq in the process perhaps? > > > > > > aha - drivers/pci/msi.c sets msix_irq_type, which has no handle_irq > > > entry. This needs to be converted to irqchips. > > > > still ... that doesnt explain how the irq_desc[].irq_handler got NULL. > > It has it's own irq_desc array > > static struct msi_desc* msi_desc[NR_IRQS] = { [0 ... NR_IRQS-1] = NULL };
ah ...
then i guess a quick solution would be to do:
if (!irq_desc[irq].irq_handler) __do_IRQ(irq, regs); else generic_handle_irq(irq, regs);
in arch/x86_64/kernel/irq.c [and in arch/i386/kernel/irq.c], and __do_IRQ() should handle the old-style irq-type MSI code just fine.
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