From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755905AbYJUTQY (ORCPT ); Tue, 21 Oct 2008 15:16:24 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755569AbYJUTPP (ORCPT ); Tue, 21 Oct 2008 15:15:15 -0400 Received: from mail.windriver.com ([147.11.1.11]:44703 "EHLO mail.wrs.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755551AbYJUTPM (ORCPT ); Tue, 21 Oct 2008 15:15:12 -0400 From: Jason Wessel To: kgdb-bugreport@lists.sourceforge.net Cc: linux-kernel@vger.kernel.org, Jason Wessel , alan@lxorguk.ukuu.org.uk Subject: [PATCH 4/7] kgdboc, 8250: Add the rx polling hook to 8250 driver Date: Tue, 21 Oct 2008 14:14:50 -0500 Message-Id: <1224616493-23237-5-git-send-email-jason.wessel@windriver.com> X-Mailer: git-send-email 1.6.0.2 In-Reply-To: <1224616493-23237-4-git-send-email-jason.wessel@windriver.com> References: <1224616493-23237-1-git-send-email-jason.wessel@windriver.com> <1224616493-23237-2-git-send-email-jason.wessel@windriver.com> <1224616493-23237-3-git-send-email-jason.wessel@windriver.com> <1224616493-23237-4-git-send-email-jason.wessel@windriver.com> X-OriginalArrivalTime: 21 Oct 2008 19:14:58.0279 (UTC) FILETIME=[4EE77770:01C933B1] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The RX polling hook allows the debugger to hook character input so as to allow entry to the kernel debugger with a control-c as an example. Signed-off-by: Jason Wessel --- drivers/serial/8250.c | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c index 303272a..4f7343e 100644 --- a/drivers/serial/8250.c +++ b/drivers/serial/8250.c @@ -1361,6 +1361,10 @@ receive_chars(struct uart_8250_port *up, unsigned int *status) else if (lsr & UART_LSR_FE) flag = TTY_FRAME; } +#ifdef CONFIG_CONSOLE_POLL + if (up->port.poll_rx_cb && up->port.poll_rx_cb(ch)) + goto ignore_char; +#endif if (uart_handle_sysrq_char(&up->port, ch)) goto ignore_char; -- 1.6.0.2