From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752089AbaHTJX1 (ORCPT ); Wed, 20 Aug 2014 05:23:27 -0400 Received: from filter1.ibarracuda.nl ([83.247.7.10]:50611 "EHLO filter1.ibarracuda.nl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751980AbaHTJXZ (ORCPT ); Wed, 20 Aug 2014 05:23:25 -0400 X-ASG-Debug-ID: 1408526602-0759e7416b4b140c0002-xx1T2L X-Barracuda-Envelope-From: Frans.Klaver@xsens.com X-Barracuda-AUTH-User: xsenscom X-Barracuda-Apparent-Source-IP: 87.249.116.215 Date: Wed, 20 Aug 2014 11:23:21 +0200 From: Frans Klaver To: Sebastian Andrzej Siewior CC: , , , , , , Vinod Koul , Greg Kroah-Hartman , Subject: Re: [PATCH 03/15] tty: serial: 8250_core: add run time pm Message-ID: <20140820092319.GA20775@ci00147.xsens-tech.local> X-ASG-Orig-Subj: Re: [PATCH 03/15] tty: serial: 8250_core: add run time pm References: <1408124563-31541-1-git-send-email-bigeasy@linutronix.de> <1408124563-31541-4-git-send-email-bigeasy@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Disposition: inline In-Reply-To: <1408124563-31541-4-git-send-email-bigeasy@linutronix.de> User-Agent: Mutt/1.5.23 (2014-03-12) X-Originating-IP: [172.16.11.49] X-Barracuda-Connect: rev-215.116.249.87.virtu.nl[87.249.116.215] X-Barracuda-Start-Time: 1408526603 X-Barracuda-Encrypted: AES128-SHA X-Barracuda-URL: http://filter1.ibarracuda.nl:8000/cgi-mod/mark.cgi X-Barracuda-BRTS-Status: 1 X-Barracuda-Spam-Score: 0.00 X-Barracuda-Spam-Status: No, SCORE=0.00 using per-user scores of TAG_LEVEL=1000.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=5.0 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.3.8645 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, On Fri, Aug 15, 2014 at 07:42:31PM +0200, Sebastian Andrzej Siewior wrote: > --- a/drivers/tty/serial/8250/8250_core.c > +++ b/drivers/tty/serial/8250/8250_core.c > @@ -1899,12 +1984,22 @@ static void wait_for_xmitr(struct uart_8250_port *up, int bits) > > static int serial8250_get_poll_char(struct uart_port *port) > { > - unsigned char lsr = serial_port_in(port, UART_LSR); > + unsigned char lsr; > + int status; > + > + serial8250_rpm_get(up); or up won't be defined below. You probably need + struct uart_8250_port *up = up_to_u8250p(port); somewhere in there. > - if (!(lsr & UART_LSR_DR)) > - return NO_POLL_CHAR; > + lsr = serial_port_in(port, UART_LSR); > > - return serial_port_in(port, UART_RX); > + if (!(lsr & UART_LSR_DR)) { > + status = NO_POLL_CHAR; > + goto out; > + } > + > + status = serial_port_in(port, UART_RX); > +out: > + serial8250_rpm_put(up); > + return status; > } Cheers, Frans