From mboxrd@z Thu Jan 1 00:00:00 1970 From: Philippe Langlais Subject: [PATCH] tty: serial: 8250: remove U6715 16550A auto-detection Date: Tue, 19 Mar 2013 20:50:09 +0100 Message-ID: <1363722609-20021-1-git-send-email-philippe.langlais@st.com> Return-path: Received: from smtp10.smtpout.orange.fr ([80.12.242.132]:24610 "EHLO smtp.smtpout.orange.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754739Ab3CST62 (ORCPT ); Tue, 19 Mar 2013 15:58:28 -0400 Sender: linux-serial-owner@vger.kernel.org List-Id: linux-serial@vger.kernel.org To: linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org, Greg Kroah-Hartman Cc: Hans-Peter Oeri , Philippe Langlais The auto-detection based on 64 bytes fifo size causes troubles for the identification of the MultiTechZPX Modems (pci 11c1:0480). They loose the ability to do hardware flow control (specifically CTS is never set). Signed-off-by: Philippe Langlais --- drivers/tty/serial/8250/8250.c | 9 --------- 1 file changed, 9 deletions(-) diff --git a/drivers/tty/serial/8250/8250.c b/drivers/tty/serial/8250/8250.c index cf6a538..3255014 100644 --- a/drivers/tty/serial/8250/8250.c +++ b/drivers/tty/serial/8250/8250.c @@ -1026,15 +1026,6 @@ static void autoconfig_16550a(struct uart_8250_port *up) return; } - - /* - * We distinguish between 16550A and U6 16550A by counting - * how many bytes are in the FIFO. - */ - if (up->port.type == PORT_16550A && size_fifo(up) == 64) { - up->port.type = PORT_U6_16550A; - up->capabilities |= UART_CAP_AFE; - } } /* -- 1.7.9.5