Upstream pty kernel driver already moved the tty_flip_buffer_push Out of tty_flip_buffer_push, adjust the tty_diag driver to do the same Otherwise there will be lockup watchdog panic generated Change-Id: Ib1ea301cff482b1b6905f20ce99995fe2f5b5aef Signed-off-by: a17671 <a17671@motorola.com> Reviewed-on: https://gerrit.mot.com/2130815 SLTApproved: Slta Waiver SME-Granted: SME Approvals Granted Tested-by: Jira Key Reviewed-by: Xiangpo Zhao <zhaoxp3@motorola.com> Submit-Approved: Jira Key