From patchwork Mon Sep 10 09:36:44 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Zimmermann X-Patchwork-Id: 10593819 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 5E5E414BD for ; Mon, 10 Sep 2018 09:37:03 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4DB3E28AE0 for ; Mon, 10 Sep 2018 09:37:03 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 414AC28E23; Mon, 10 Sep 2018 09:37:03 +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 0023228AE0 for ; Mon, 10 Sep 2018 09:37:02 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id CFEC989815; Mon, 10 Sep 2018 09:37:00 +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 8D82B89815 for ; Mon, 10 Sep 2018 09:36:59 +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 04F25AEB4; Mon, 10 Sep 2018 09:36:57 +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: Mon, 10 Sep 2018 11:36:44 +0200 Message-Id: <20180910093644.17558-1-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 429f6a453619..b6cff31903b3 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)