Hi Gerd, 李林,
On 05/15/2017 07:45 AM, Gerd Hoffmann wrote:
> In case the frame timer doesn't run for a while due to the host being
> busy skipped_uframes can become big enough that UFRAME_TIMER_NS *
> skipped_uframes overflows. Which in turn throws off all subsequent
> ehci frame timer calculations.
>
> Reported-by: 李林 <8610_28@163.com>
李林: You may want to add your Signed-off-by here along with Gerd's.
> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
> ---
> hw/usb/hcd-ehci.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/hw/usb/hcd-ehci.c b/hw/usb/hcd-ehci.c
> index 3703a8dddc..17c572c55f 100644
> --- a/hw/usb/hcd-ehci.c
> +++ b/hw/usb/hcd-ehci.c
> @@ -2238,7 +2238,7 @@ static void ehci_work_bh(void *opaque)
> int need_timer = 0;
> int64_t expire_time, t_now;
> uint64_t ns_elapsed;
> - int uframes, skipped_uframes;
> + uint64_t uframes, skipped_uframes;
> int i;
>
> t_now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
>