From patchwork Thu Jul 31 15:33:21 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maarten Lankhorst X-Patchwork-Id: 4656841 Return-Path: X-Original-To: patchwork-dri-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 7230A9F32F for ; Thu, 31 Jul 2014 15:33:31 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id A9B00201BB for ; Thu, 31 Jul 2014 15:33:30 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id D351B201B9 for ; Thu, 31 Jul 2014 15:33:28 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 10ACB6E67D; Thu, 31 Jul 2014 08:33:28 -0700 (PDT) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from adelie.canonical.com (adelie.canonical.com [91.189.90.139]) by gabe.freedesktop.org (Postfix) with ESMTP id A8F9D6E679; Thu, 31 Jul 2014 08:33:26 -0700 (PDT) Received: from lillypilly.canonical.com ([91.189.89.62]) by adelie.canonical.com with esmtp (Exim 4.71 #1 (Debian)) id 1XCsM6-0002Uv-QX; Thu, 31 Jul 2014 15:33:22 +0000 Received: by lillypilly.canonical.com (Postfix, from userid 3489) id C3D5226C27A3; Thu, 31 Jul 2014 15:33:22 +0000 (UTC) Subject: [PATCH 06/19] drm/ttm: call ttm_bo_wait while inside a reservation To: airlied@linux.ie From: Maarten Lankhorst Date: Thu, 31 Jul 2014 17:33:21 +0200 Message-ID: <20140731153321.15061.64400.stgit@patser> In-Reply-To: <20140731153245.15061.63023.stgit@patser> References: <20140731153245.15061.63023.stgit@patser> User-Agent: StGit/0.15 MIME-Version: 1.0 Cc: thellstrom@vmware.com, nouveau@lists.freedesktop.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, bskeggs@redhat.com, alexander.deucher@amd.com, christian.koenig@amd.com X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Spam-Status: No, score=-4.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This is the last remaining function that doesn't use the reservation lock completely to fence off access to a buffer. --- drivers/gpu/drm/ttm/ttm_bo.c | 25 ++++++++++++------------- 1 file changed, 12 insertions(+), 13 deletions(-) diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c index 3da89d5dab60..df08f18f05ac 100644 --- a/drivers/gpu/drm/ttm/ttm_bo.c +++ b/drivers/gpu/drm/ttm/ttm_bo.c @@ -502,17 +502,6 @@ static int ttm_bo_cleanup_refs_and_unlock(struct ttm_buffer_object *bo, if (ret) return ret; - /* - * remove sync_obj with ttm_bo_wait, the wait should be - * finished, and no new wait object should have been added. - */ - spin_lock(&bdev->fence_lock); - ret = ttm_bo_wait(bo, false, false, true); - WARN_ON(ret); - spin_unlock(&bdev->fence_lock); - if (ret) - return ret; - spin_lock(&glob->lru_lock); ret = __ttm_bo_reserve(bo, false, true, false, NULL); @@ -528,8 +517,16 @@ static int ttm_bo_cleanup_refs_and_unlock(struct ttm_buffer_object *bo, spin_unlock(&glob->lru_lock); return 0; } - } else - spin_unlock(&bdev->fence_lock); + + /* + * remove sync_obj with ttm_bo_wait, the wait should be + * finished, and no new wait object should have been added. + */ + spin_lock(&bdev->fence_lock); + ret = ttm_bo_wait(bo, false, false, true); + WARN_ON(ret); + } + spin_unlock(&bdev->fence_lock); if (ret || unlikely(list_empty(&bo->ddestroy))) { __ttm_bo_unreserve(bo); @@ -1539,6 +1536,8 @@ int ttm_bo_wait(struct ttm_buffer_object *bo, void *sync_obj; int ret = 0; + lockdep_assert_held(&bo->resv->lock.base); + if (likely(bo->sync_obj == NULL)) return 0;