From patchwork Thu Jun 22 11:40:00 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sakari Ailus X-Patchwork-Id: 695510 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 97E77EB64D8 for ; Thu, 22 Jun 2023 11:41:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230489AbjFVLlU (ORCPT ); Thu, 22 Jun 2023 07:41:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42262 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230390AbjFVLlP (ORCPT ); Thu, 22 Jun 2023 07:41:15 -0400 Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 68A7D1BF0 for ; Thu, 22 Jun 2023 04:41:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1687434074; x=1718970074; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=n558qqOWaFLSALEjWzuMcwTrFFUUbReOPihnJqtypBA=; b=Du8rk7Fwms/4ZxWTdH1Mu5HO9FyBIsWRbtqN5hTWY+ydGHGTOLtBcINi FKVLH0cxaU9/MwHsAOKX74zzQ5JCZMBGTU83vWsZr9pCQfppGMzutG4PO kI6PorI9lnK++YQcNf9vNQAEEYimYuOmGP0FrfB4DGvMU3Ub22MB/D1nm pHtSlpI0DG3e//A8KW7fKUXSS69JHbHXhcutALQqFCPM7ehRlOeek3DSc fQKJPESh+6PikFmmPBEHWWKq26ByNK42sitRhimSSHU6yGuSdAGZH9SVG y2r0ioexNl09z9xQVGbEjWc8/vIY6JJi+QtEUz6KeH3IheqJTBtuArmzB w==; X-IronPort-AV: E=McAfee;i="6600,9927,10748"; a="357957638" X-IronPort-AV: E=Sophos;i="6.00,263,1681196400"; d="scan'208";a="357957638" Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Jun 2023 04:41:10 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10748"; a="804749893" X-IronPort-AV: E=Sophos;i="6.00,263,1681196400"; d="scan'208";a="804749893" Received: from turnipsi.fi.intel.com (HELO kekkonen.fi.intel.com) ([10.237.72.44]) by fmsmga003-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Jun 2023 04:41:03 -0700 Received: from punajuuri.localdomain (punajuuri.localdomain [192.168.240.130]) by kekkonen.fi.intel.com (Postfix) with ESMTP id E714F120B58; Thu, 22 Jun 2023 14:40:50 +0300 (EEST) Received: from sailus by punajuuri.localdomain with local (Exim 4.96) (envelope-from ) id 1qCIg2-003oSf-2l; Thu, 22 Jun 2023 14:40:38 +0300 From: Sakari Ailus To: linux-media@vger.kernel.org Cc: laurent.pinchart@ideasonboard.com, Philipp Zabel , hverkuil@xs4all.nl, Francesco Dolcini , aishwarya.kothari@toradex.com, Robert Foss , Todor Tomov , Hyun Kwon , bingbu.cao@intel.com, niklas.soderlund@ragnatech.se, Kieran Bingham , Benjamin Mugnier , Sylvain Petinot , Eugen Hristev , Nicolas Ferre , Maxime Ripard , Rui Miguel Silva , Fabio Estevam , Bryan O'Donoghue , Sylwester Nawrocki , Dafna Hirschfeld , Hugues Fruchet , Yong Deng , Paul Kocialkowski , "Lad, Prabhakar" , Benoit Parrot , Steve Longerbeam , Thierry Reding , Jonathan Hunter , Sowjanya Komatineni , Marco Felsch Subject: [PATCH v4 10/38] media: Documentation: v4l: Document v4l2_async_nf_cleanup Date: Thu, 22 Jun 2023 14:40:00 +0300 Message-Id: <20230622114028.908825-11-sakari.ailus@linux.intel.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230622114028.908825-1-sakari.ailus@linux.intel.com> References: <20230622114028.908825-1-sakari.ailus@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Document v4l2_async_nf_cleanup() which must be called before releasing an unregistered notifier's memory. Also remove the sentence regarding v4l2_async_nf_init() arguments --- those are documented in kerneldoc which is referred here. Signed-off-by: Sakari Ailus --- Documentation/driver-api/media/v4l2-subdev.rst | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-) diff --git a/Documentation/driver-api/media/v4l2-subdev.rst b/Documentation/driver-api/media/v4l2-subdev.rst index e463ab4a3413a..327d444f34dcb 100644 --- a/Documentation/driver-api/media/v4l2-subdev.rst +++ b/Documentation/driver-api/media/v4l2-subdev.rst @@ -198,12 +198,11 @@ picked up by bridge drivers. Asynchronous sub-device notifiers ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ -Bridge drivers in turn have to register a notifier object. This is -performed using the :c:func:`v4l2_async_nf_register` call. To -unregister the notifier the driver has to call -:c:func:`v4l2_async_nf_unregister`. The former of the two functions -takes two arguments: a pointer to struct :c:type:`v4l2_device` and a -pointer to struct :c:type:`v4l2_async_notifier`. +Bridge drivers in turn have to register a notifier object. This is performed +using the :c:func:`v4l2_async_nf_register` call. To unregister the notifier the +driver has to call :c:func:`v4l2_async_nf_unregister`. Before releasing memory +of an unregister notifier, it must be cleaned up by calling +:c:func:`v4l2_async_nf_cleanup`. Before registering the notifier, bridge drivers must do two things: first, the notifier must be initialized using the :c:func:`v4l2_async_nf_init`. Second,