From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756310Ab0ESBkJ (ORCPT ); Tue, 18 May 2010 21:40:09 -0400 Received: from mail.windriver.com ([147.11.1.11]:41101 "EHLO mail.windriver.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753549Ab0ESBkE (ORCPT ); Tue, 18 May 2010 21:40:04 -0400 From: Jason Wessel To: torvalds@linux-foundation.org Cc: linux-kernel@vger.kernel.org, kgdb-bugreport@lists.sourceforge.net, Jason Wessel Subject: [PATCH 11/25] sh,sh-sci: Use NO_POLL_CHAR in the SCIF polled console code Date: Tue, 18 May 2010 20:39:21 -0500 Message-Id: <1274233175-3675-12-git-send-email-jason.wessel@windriver.com> X-Mailer: git-send-email 1.6.4.rc1 In-Reply-To: <1274233175-3675-1-git-send-email-jason.wessel@windriver.com> References: <1274233175-3675-1-git-send-email-jason.wessel@windriver.com> X-OriginalArrivalTime: 19 May 2010 01:39:50.0860 (UTC) FILETIME=[2C4430C0:01CAF6F4] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The sci_poll_get_char() needs to return immediately if there is no input from the chip to process, and must return a value of NO_POLL_CHAR. This allows kgdboc to process multiple polled devices while kgdb is active. Signed-off-by: Jason Wessel Acked-by: Paul Mundt --- drivers/serial/sh-sci.c | 6 +++++- 1 files changed, 5 insertions(+), 1 deletions(-) diff --git a/drivers/serial/sh-sci.c b/drivers/serial/sh-sci.c index 8eb094c..725301f 100644 --- a/drivers/serial/sh-sci.c +++ b/drivers/serial/sh-sci.c @@ -150,7 +150,11 @@ static int sci_poll_get_char(struct uart_port *port) handle_error(port); continue; } - } while (!(status & SCxSR_RDxF(port))); + break; + } while (1); + + if (!(status & SCxSR_RDxF(port))) + return NO_POLL_CHAR; c = sci_in(port, SCxRDR); -- 1.6.3.3