On Friday, September 25, 2015 06:40:40 PM Bjorn Helgaas wrote: > On Thu, Sep 17, 2015 at 02:02:45PM +0800, Jiang Liu wrote: > > Avoid IRQs occupied by ISA IRQs when allocating IRQs for PCI link devices, > > otherwise it may cause interrupt storm due to incompatible pin attributes. > > > > This issue was triggered on a KVM virtual machine, which > > 1) uses IRQ9 for SCI in high level mode. > > 2) defines an PCI interrupt link device (LNKS) with IRQ9 as the only > > possible irq. > > 3) has an PCI device referring to link device LNKS. > > So it causes interrupt storm when enabling the PCI device because PCI IRQ > > works in low level mode. > > > > Signed-off-by: Jiang Liu <jiang.liu@xxxxxxxxxxxxxxx> > > Acked-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx> Thanks! Queued up both this and the [2/2] for 4.3-rc4. Thanks, Rafael -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
