[PULL 2/3] ps2: Don't send key release event for Lang1, Lang2 keys

["Daniel P. Berrangé" <berrange@redhat.com>]

From: Ross Lagerwall <ross.lagerwall@citrix.com>

The scancodes for the Lang1 and Lang2 keys (i.e. Hangeul, Hanja) are
special since they already have the 0x80 bit set which is commonly used
to indicate a key release in AT set 1. Reportedly, real hardware does
not send a key release scancode. So, skip sending a release for these
keys. This ensures that Windows behaves correctly and interprets it as a
single keypress rather than two consecutive keypresses.

Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
---
 hw/input/ps2.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/hw/input/ps2.c b/hw/input/ps2.c
index 3253ab6a92..45af76a837 100644
--- a/hw/input/ps2.c
+++ b/hw/input/ps2.c
@@ -402,6 +402,9 @@ static void ps2_keyboard_event(DeviceState *dev, QemuConsole *src,
                     ps2_put_keycode(s, 0xaa);
                 }
             }
+        } else if ((qcode == Q_KEY_CODE_LANG1 || qcode == Q_KEY_CODE_LANG2)
+                   && !key->down) {
+            /* Ignore release for these keys */
         } else {
             if (qcode < qemu_input_map_qcode_to_atset1_len) {
                 keycode = qemu_input_map_qcode_to_atset1[qcode];
@@ -497,6 +500,9 @@ static void ps2_keyboard_event(DeviceState *dev, QemuConsole *src,
                     ps2_put_keycode(s, 0x12);
                 }
             }
+        } else if ((qcode == Q_KEY_CODE_LANG1 || qcode == Q_KEY_CODE_LANG2) &&
+                   !key->down) {
+            /* Ignore release for these keys */
         } else {
             if (qcode < qemu_input_map_qcode_to_atset2_len) {
                 keycode = qemu_input_map_qcode_to_atset2[qcode];
-- 
2.39.2