On Mon, Mar 31, 2014 at 02:31:44PM -0400, Cole Robinson wrote:
> irq_state is cleared before calling pci_device_deassert_intx, but the
> latter misbehaves if the former isn't accurate. In this case, any raised
> IRQs are not cleared, which hits an assertion in pcibus_reset:
>
> qemu-system-x86_64: hw/pci/pci.c:250: pcibus_reset: Assertion
> `bus->irq_count[i] == 0' failed.
>
> pci_device_deassert_intx should clear irq_state anyways, so add
> an assert.
>
> This fixes migration with usb2 + usb-tablet.
>
> Signed-off-by: Cole Robinson <crobi...@redhat.com>
Reviewed-by: Michael S. Tsirkin <m...@redhat.com>
Peter, could you pick this up for RC3 if not too late?
> ---
> hw/pci/pci.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/hw/pci/pci.c b/hw/pci/pci.c
> index 8f722dd..2a9f08e 100644
> --- a/hw/pci/pci.c
> +++ b/hw/pci/pci.c
> @@ -189,9 +189,9 @@ static void pci_do_device_reset(PCIDevice *dev)
> {
> int r;
>
> - dev->irq_state = 0;
> - pci_update_irq_status(dev);
> pci_device_deassert_intx(dev);
> + assert(dev->irq_state == 0);
> +
> /* Clear all writable bits */
> pci_word_test_and_clear_mask(dev->config + PCI_COMMAND,
> pci_get_word(dev->wmask + PCI_COMMAND) |
> --
> 1.8.5.3
