From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932597AbcKOLT3 (ORCPT ); Tue, 15 Nov 2016 06:19:29 -0500 Received: from schu.reccoware.net ([87.106.213.85]:60751 "EHLO schu.reccoware.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751783AbcKOLT1 (ORCPT ); Tue, 15 Nov 2016 06:19:27 -0500 X-Greylist: delayed 668 seconds by postgrey-1.27 at vger.kernel.org; Tue, 15 Nov 2016 06:19:26 EST Message-ID: <1479207929.4985.25.camel@reccoware.de> Subject: [PATCH] mxs-auart: count FIFO overrun errors From: Wolfgang Ocker To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org Cc: Greg Kroah-Hartman , Jiri Slaby Date: Tue, 15 Nov 2016 12:05:29 +0100 Organization: Reccoware Systems Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.18.5.2 (3.18.5.2-1.fc23) Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The mxs-auart driver does not count FIFO overrun errors. These errors never appear in /proc/tty/driver/ttyAPP. This is because the OERR status bit is masked by read_status_mask in the rx interrupt function, but the AUART_STAT_OERR bit is never set in read_status_mask. The patch enables the counting of overrun errors. Signed-off-by: Wolfgang Ocker ---  drivers/tty/serial/mxs-auart.c | 2 +-  1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/tty/serial/mxs-auart.c b/drivers/tty/serial/mxs-auart.c index 770454e0dfa3..8c1c9112b3fd 100644 --- a/drivers/tty/serial/mxs-auart.c +++ b/drivers/tty/serial/mxs-auart.c @@ -1016,7 +1016,7 @@ static void mxs_auart_settermios(struct uart_port *u,   ctrl |= AUART_LINECTRL_EPS;   }   - u->read_status_mask = 0; + u->read_status_mask = AUART_STAT_OERR;     if (termios->c_iflag & INPCK)   u->read_status_mask |= AUART_STAT_PERR; --  2.10.0