From patchwork Tue Sep 21 10:33:40 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Lindgren X-Patchwork-Id: 12507555 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-11.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 53284C433FE for ; Tue, 21 Sep 2021 10:33:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 38D1F60FC1 for ; Tue, 21 Sep 2021 10:33:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231797AbhIUKfW (ORCPT ); Tue, 21 Sep 2021 06:35:22 -0400 Received: from muru.com ([72.249.23.125]:35502 "EHLO muru.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231615AbhIUKfW (ORCPT ); Tue, 21 Sep 2021 06:35:22 -0400 Received: from hillo.muru.com (localhost [127.0.0.1]) by muru.com (Postfix) with ESMTP id 5BAAE80A8; Tue, 21 Sep 2021 10:34:20 +0000 (UTC) From: Tony Lindgren To: Greg Kroah-Hartman Cc: Andy Shevchenko , Jiri Slaby , Johan Hovold , Vignesh Raghavendra , linux-serial@vger.kernel.org, linux-omap@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 0/6] Get rid of pm_runtime_irq_safe() for 8250_omap Date: Tue, 21 Sep 2021 13:33:40 +0300 Message-Id: <20210921103346.64824-1-tony@atomide.com> X-Mailer: git-send-email 2.33.0 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org Hi, Here are patches to get rid of pm_runtime_irq_safe() for the 8250_omap driver. For removing the pm_runtime_irq_safe() usage, serial TX is the last remaining issue. We deal with TX by waking up the port and returning 0 bytes written from write_room() and write() if the port is not available because of PM runtime autoidle. This series also removes the dependency to Andy's pending generic serial layer PM runtime patches, and hopefully makes that work a bit easier :) Regards, Tony Tony Lindgren (6): n_tty: Start making use of -EAGAIN returned from process_output_block() tty: n_gsm: Don't ignore write return value in gsmld_output() serial: core: Add new prep_tx for power management serial: 8250: Implement prep_tx for power management serial: 8250_omap: Require a valid wakeirq for deeper idle states serial: 8250_omap: Drop the use of pm_runtime_irq_safe() Documentation/driver-api/serial/driver.rst | 9 ++++++ drivers/tty/n_gsm.c | 5 ++- drivers/tty/n_tty.c | 8 +++-- drivers/tty/serial/8250/8250_omap.c | 36 +++++++++++++++------- drivers/tty/serial/8250/8250_port.c | 24 +++++++++++++++ drivers/tty/serial/serial_core.c | 23 ++++++++++++++ include/linux/serial_core.h | 1 + 7 files changed, 90 insertions(+), 16 deletions(-) Reviewed-by: Andy Shevchenko