diff options
| -rw-r--r-- | common/keyboard_8042.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/common/keyboard_8042.c b/common/keyboard_8042.c index 41729266f0..a99416aa04 100644 --- a/common/keyboard_8042.c +++ b/common/keyboard_8042.c @@ -667,6 +667,13 @@ static int handle_keyboard_command(uint8_t command, uint8_t *output) switch (command) { case I8042_READ_CMD_BYTE: + /* + * Ensure that the keyboard buffer is cleared before adding + * command byte to it. Since the host is asking for command + * byte, sending it buffered key press data can confuse the + * host and result in it taking incorrect action. + */ + keyboard_clear_buffer(); output[out_len++] = read_ctl_ram(0); break; |