From patchwork Tue Jul 31 06:37:35 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Zimmermann X-Patchwork-Id: 10550151 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 0FBD21708 for ; Tue, 31 Jul 2018 06:37:45 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id F0BBF29EF6 for ; Tue, 31 Jul 2018 06:37:44 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E4B0C29F63; Tue, 31 Jul 2018 06:37:44 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 9365E29EF6 for ; Tue, 31 Jul 2018 06:37:44 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id B15FD6E0DA; Tue, 31 Jul 2018 06:37:43 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mx1.suse.de (mx2.suse.de [195.135.220.15]) by gabe.freedesktop.org (Postfix) with ESMTPS id 696366E0DA for ; Tue, 31 Jul 2018 06:37:42 +0000 (UTC) X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id DD9A7ACD6; Tue, 31 Jul 2018 06:37:40 +0000 (UTC) From: Thomas Zimmermann To: gregkh@linuxfoundation.org, hdegoede@redhat.com, michael.thayer@oracle.com, dri-devel@lists.freedesktop.org Subject: [PATCH] staging/vboxvideo: Replace ttm_bo_unref with ttm_bo_put Date: Tue, 31 Jul 2018 08:37:35 +0200 Message-Id: <20180731063735.11899-1-tzimmermann@suse.de> X-Mailer: git-send-email 2.18.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Thomas Zimmermann MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP The function ttm_bo_put releases a reference to a TTM buffer object. The function's name is more aligned to the Linux kernel convention of naming ref-counting function _get and _put. A call to ttm_bo_unref takes the address of the TTM BO object's pointer and clears the pointer's value to NULL. This is not necessary in most cases and sometimes even worked around by the calling code. A call to ttm_bo_put only releases the reference without clearing the pointer. The current behaviour of cleaning the pointer is kept in the calling code, but should be removed if not required in a later patch. Signed-off-by: Thomas Zimmermann --- drivers/staging/vboxvideo/vbox_main.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/staging/vboxvideo/vbox_main.c b/drivers/staging/vboxvideo/vbox_main.c index 9d2018cd544e..fc7293b756b2 100644 --- a/drivers/staging/vboxvideo/vbox_main.c +++ b/drivers/staging/vboxvideo/vbox_main.c @@ -490,9 +490,8 @@ static void vbox_bo_unref(struct vbox_bo **bo) return; tbo = &((*bo)->bo); - ttm_bo_unref(&tbo); - if (!tbo) - *bo = NULL; + ttm_bo_put(tbo); + *bo = NULL; } void vbox_gem_free_object(struct drm_gem_object *obj)