On 2014/11/27 17:04, Gerd Hoffmann wrote:
> Cc: Gonglei <arei.gong...@huawei.com>
> Cc: Dr. David Alan Gilbert <dgilb...@redhat.com>
> Signed-off-by: Gerd Hoffmann <kra...@redhat.com>
> ---
> hw/input/hid.c | 21 +++++++++++++++++++++
> 1 file changed, 21 insertions(+)
>
> diff --git a/hw/input/hid.c b/hw/input/hid.c
> index 8f6fbb3..6fb963f 100644
> --- a/hw/input/hid.c
> +++ b/hw/input/hid.c
> @@ -519,6 +519,27 @@ static int hid_post_load(void *opaque, int version_id)
> HIDState *s = opaque;
>
> hid_set_next_idle(s);
> +
> + if (s->n == QUEUE_LENGTH && (s->kind == HID_TABLET ||
> + s->kind == HID_MOUSE)) {
> + /*
> + * Handle ptr device migration from old qemu with full queue.
> + *
> + * Throw away everything but the last event, so we propagate
> + * at least the current button state to the guest. Also keep
> + * current position for the tablet, signal "no motion" for the
> + * mouse.
> + */
> + HIDPointerEvent evt;
> + evt = s->ptr.queue[(s->head+s->n) & QUEUE_MASK];
s->n is QUEUE_LENGTH, can we directly delete it?
evt = s->ptr.queue[s->head & QUEUE_MASK]
Best regards,
-Gonglei
> + if (s->kind == HID_MOUSE) {
> + evt.xdx = 0;
> + evt.ydy = 0;
> + }
> + s->ptr.queue[0] = evt;
> + s->head = 0;
> + s->n = 1;
> + }
> return 0;
> }
>
