2.6.27.59-stable review patch. If anyone has any objections, please let us know.
------------------ From: Anton Blanchard <[email protected]> commit 5d7a87217de48b234b3c8ff8a73059947d822e07 upstream. I saw this in a kdump kernel: IOMMU table initialized, virtual merging enabled Interrupt 155954 (real) is invalid, disabling it. Interrupt 155953 (real) is invalid, disabling it. ie we took some spurious interrupts. default_machine_crash_shutdown tries to disable all interrupt sources but uses chip->disable which maps to the default action of: static void default_disable(unsigned int irq) { } If we use chip->shutdown, then we actually mask the IRQ: static void default_shutdown(unsigned int irq) { struct irq_desc *desc = irq_to_desc(irq); desc->chip->mask(irq); desc->status |= IRQ_MASKED; } Not sure why we don't implement a ->disable action for xics.c, or why default_disable doesn't mask the interrupt. Signed-off-by: Anton Blanchard <[email protected]> Signed-off-by: Benjamin Herrenschmidt <[email protected]> Signed-off-by: Kamalesh babulal <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- arch/powerpc/kernel/crash.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/powerpc/kernel/crash.c +++ b/arch/powerpc/kernel/crash.c @@ -381,7 +381,7 @@ void default_machine_crash_shutdown(stru desc->chip->eoi(i); if (!(desc->status & IRQ_DISABLED)) - desc->chip->disable(i); + desc->chip->shutdown(i); } /* _______________________________________________ stable mailing list [email protected] http://linux.kernel.org/mailman/listinfo/stable
