usb/hid: add hid_pointer_activate, use it

HID reorganziation broke the usb tablet in windows xp.  The reason is
that xp activates idle before it starts polling, which creates a
chicken-and-egg issue:  We don't call hid_pointer_poll because there are
no pending events.  We don't get any events because the activation code
in hid_pointer_poll is never executed and thus all pointer events are
routed to the PS/2 mouse by qemu.

Fix this by creating a hid_pointer_activate function and call it from
usb-hid when the guest sets the idle state.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/hw/hid.h b/hw/hid.h
index 4a8fa5b63f..9ce03b118c 100644
--- a/hw/hid.h
+++ b/hw/hid.h
@@ -51,6 +51,7 @@ void hid_free(HIDState *hs);
 
 bool hid_has_events(HIDState *hs);
 void hid_set_next_idle(HIDState *hs, int64_t curtime);
+void hid_pointer_activate(HIDState *hs);
 int hid_pointer_poll(HIDState *hs, uint8_t *buf, int len);
 int hid_keyboard_poll(HIDState *hs, uint8_t *buf, int len);
 int hid_keyboard_write(HIDState *hs, uint8_t *buf, int len);