When the upper layer calls goldfish_camera_data_uninit, priv->capture_cb=NULL, but when there is data transmission in goldfish_camera_thread, priv->capture_cb will be called, which will cause a crash.
Signed-off-by: yangsen5 <yangsen5@xiaomi.com>
vfork use waitpid hang father process,
but waitpid release child processs information by default.
So when user call wait, it return errno 10.
Signed-off-by: yangyalei <yangyalei@xiaomi.com>
