From mboxrd@z Thu Jan 1 00:00:00 1970 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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,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 9A5AAC33CAC for ; Mon, 3 Feb 2020 13:31:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7889D20CC7 for ; Mon, 3 Feb 2020 13:31:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728214AbgBCNbj (ORCPT ); Mon, 3 Feb 2020 08:31:39 -0500 Received: from mga04.intel.com ([192.55.52.120]:34156 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728171AbgBCNbg (ORCPT ); Mon, 3 Feb 2020 08:31:36 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga104.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 03 Feb 2020 05:31:36 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,398,1574150400"; d="scan'208";a="263418159" Received: from black.fi.intel.com ([10.237.72.28]) by fmsmga002.fm.intel.com with ESMTP; 03 Feb 2020 05:31:35 -0800 Received: by black.fi.intel.com (Postfix, from userid 1003) id 7AF5F2CA; Mon, 3 Feb 2020 15:31:31 +0200 (EET) From: Andy Shevchenko To: Petr Mladek , Sergey Senozhatsky , linux-kernel@vger.kernel.org, Steven Rostedt Cc: Andy Shevchenko Subject: [PATCH v5 7/7] console: Introduce ->exit() callback Date: Mon, 3 Feb 2020 15:31:30 +0200 Message-Id: <20200203133130.11591-7-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200203133130.11591-1-andriy.shevchenko@linux.intel.com> References: <20200203133130.11591-1-andriy.shevchenko@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Some consoles might require special operations on unregistering. For instance, serial console, when registered in the kernel, keeps power on for entire time, until it gets unregistered. Example of use: ->setup(console): pm_runtime_get(...); ->exit(console): pm_runtime_put(...); For such cases to have a balance we would provide ->exit() callback. Signed-off-by: Andy Shevchenko --- v5: Return error code from ->exit() (Sergey) include/linux/console.h | 1 + kernel/printk/printk.c | 3 +++ 2 files changed, 4 insertions(+) diff --git a/include/linux/console.h b/include/linux/console.h index f33016b3a401..7a140f4e5d0c 100644 --- a/include/linux/console.h +++ b/include/linux/console.h @@ -148,6 +148,7 @@ struct console { struct tty_driver *(*device)(struct console *, int *); void (*unblank)(void); int (*setup)(struct console *, char *); + int (*exit)(struct console *); int (*match)(struct console *, char *name, int idx, char *options); short flags; short index; diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c index abd9b92ae0e3..43b5cb88c607 100644 --- a/kernel/printk/printk.c +++ b/kernel/printk/printk.c @@ -2860,6 +2860,9 @@ int unregister_console(struct console *console) console_unlock(); console_sysfs_notify(); + if (console->exit) + res = console->exit(console); + return res; out_disable_unlock: -- 2.24.1