From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ilya Zykov Subject: Re: n_tty_write() going into schedule but NOT coming out Date: Wed, 03 Apr 2013 09:44:15 +0400 Message-ID: <515BC1AF.1070103@izyk.ru> References: <5156DC21.20901@synopsys.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from 95-31-19-74.broadband.corbina.ru ([95.31.19.74]:59824 "EHLO mail.izyk.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1762340Ab3DCFoR (ORCPT ); Wed, 3 Apr 2013 01:44:17 -0400 In-Reply-To: <5156DC21.20901@synopsys.com> Sender: linux-serial-owner@vger.kernel.org List-Id: linux-serial@vger.kernel.org To: Vineet Gupta Cc: lkml , linux-serial@vger.kernel.org, Ingo Molnar , Peter Zijlstra , Jiri Slaby , Peter Hurley Please, try this patch maybe it can help localize your problem. drivers/tty/n_tty.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c index 05e72be..28f15d0 100644 --- a/drivers/tty/n_tty.c +++ b/drivers/tty/n_tty.c @@ -230,6 +230,7 @@ static void reset_buffer_flags(struct tty_struct *tty) ldata->canon_head = ldata->canon_data = ldata->erasing = 0; bitmap_zero(ldata->read_flags, N_TTY_BUF_SIZE); n_tty_set_room(tty); + check_unthrottle(tty); } /**