[Qemu-devel] [PATCH 3/3] input: virtio: don't send mouse wheel event twice

[Miika S <miika9764@gmail.com>]

On Linux, a mouse event is generated for both down and up when mouse
wheel is used. This caused virtio_input_send() to be called twice each
time the wheel was used.

This commit adds a check for the button down state and only calls
virtio_input_send() when it is true.

Signed-off-by: Miika S <miika9764@gmail.com>
---
 hw/input/virtio-input-hid.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/hw/input/virtio-input-hid.c b/hw/input/virtio-input-hid.c
index 2cac659469..587616a932 100644
--- a/hw/input/virtio-input-hid.c
+++ b/hw/input/virtio-input-hid.c
@@ -225,8 +225,10 @@ static void virtio_input_handle_event(DeviceState *dev, QemuConsole *src,
         break;
     case INPUT_EVENT_KIND_BTN:
         btn = evt->u.btn.data;
-        if (vhid->wheel_axis && (btn->button == INPUT_BUTTON_WHEEL_UP ||
-                                 btn->button == INPUT_BUTTON_WHEEL_DOWN)) {
+        if (vhid->wheel_axis &&
+            (btn->button == INPUT_BUTTON_WHEEL_UP ||
+             btn->button == INPUT_BUTTON_WHEEL_DOWN) &&
+            btn->down) {
             event.type  = cpu_to_le16(EV_REL);
             event.code  = cpu_to_le16(REL_WHEEL);
             event.value = cpu_to_le32(btn->button == INPUT_BUTTON_WHEEL_UP
-- 
2.15.1