From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Hurley Subject: [PATCH v2 17/18] n_tty: Don't wait for buffer work in read() loop Date: Wed, 27 Mar 2013 07:44:07 -0400 Message-ID: <1364384648-6636-18-git-send-email-peter@hurleysoftware.com> References: <1363724513-15604-1-git-send-email-peter@hurleysoftware.com> <1364384648-6636-1-git-send-email-peter@hurleysoftware.com> Return-path: Received: from mailout01.c08.mtsvc.net ([205.186.168.189]:54551 "EHLO mailout01.c08.mtsvc.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753823Ab3C0LsM (ORCPT ); Wed, 27 Mar 2013 07:48:12 -0400 In-Reply-To: <1364384648-6636-1-git-send-email-peter@hurleysoftware.com> Sender: linux-serial-owner@vger.kernel.org List-Id: linux-serial@vger.kernel.org To: Greg Kroah-Hartman , Jiri Slaby Cc: linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org, Min Zhang , Ilya Zykov , Peter Hurley User-space read() can run concurrently with receiving from device; waiting for receive_buf() to complete is not required. Signed-off-by: Peter Hurley --- drivers/tty/n_tty.c | 1 - 1 file changed, 1 deletion(-) diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c index 68445c7..adccff8 100644 --- a/drivers/tty/n_tty.c +++ b/drivers/tty/n_tty.c @@ -1724,7 +1724,6 @@ static inline int input_available_p(struct tty_struct *tty, int amt) { struct n_tty_data *ldata = tty->disc_data; - tty_flush_to_ldisc(tty); if (ldata->icanon && !L_EXTPROC(tty)) { if (ldata->canon_head != ldata->read_tail) return 1; -- 1.8.1.2