Re: [Qemu-devel] [PATCH 1/3] usb-hub: wakeup on attach

[hkran <hkran@vnet.linux.ibm.com>]

On 11/01/2011 10:56 PM, Gerd Hoffmann wrote:
> When attaching a new device we must send a wakeup request to the root
> hub, otherwise the guest will not notice the new device in case the
> usb hub is suspended.
>
> Signed-off-by: Gerd Hoffmann<kraxel@redhat.com>
> ---
>   hw/usb-hub.c |    1 +
>   1 files changed, 1 insertions(+), 0 deletions(-)
>
> diff --git a/hw/usb-hub.c b/hw/usb-hub.c
> index 09c6516..7b47079 100644
> --- a/hw/usb-hub.c
> +++ b/hw/usb-hub.c
> @@ -163,6 +163,7 @@ static void usb_hub_attach(USBPort *port1)
>       } else {
>           port->wPortStatus&= ~PORT_STAT_LOW_SPEED;
>       }
> +    usb_wakeup(&s->dev);
>   }
>
>   static void usb_hub_detach(USBPort *port1)
pulled, In what cases, the usb hub will be suspended? and how to tell it 
happened? thanks.