From patchwork Tue Jan 14 15:48:58 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maarten Lankhorst X-Patchwork-Id: 3486511 Return-Path: X-Original-To: patchwork-dri-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 958F2C02DC for ; Tue, 14 Jan 2014 15:49:09 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 940502021B for ; Tue, 14 Jan 2014 15:49:08 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id 6E83C2021A for ; Tue, 14 Jan 2014 15:49:07 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 31D5BFCD8C; Tue, 14 Jan 2014 07:49:05 -0800 (PST) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from youngberry.canonical.com (youngberry.canonical.com [91.189.89.112]) by gabe.freedesktop.org (Postfix) with ESMTP id 09D5DFCD8C; Tue, 14 Jan 2014 07:49:00 -0800 (PST) Received: from 5ed49945.cm-7-5c.dynamic.ziggo.nl ([94.212.153.69] helo=[192.168.1.128]) by youngberry.canonical.com with esmtpsa (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1W36Ec-0003Ow-OY; Tue, 14 Jan 2014 15:48:58 +0000 Message-ID: <52D55C6A.80804@canonical.com> Date: Tue, 14 Jan 2014 16:48:58 +0100 From: Maarten Lankhorst User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.2.0 MIME-Version: 1.0 To: Ben Skeggs Subject: [PATCH 1/2] drm/nouveau: hold mutex while syncing to kernel channel Cc: "nouveau@lists.freedesktop.org" , "dri-devel@lists.freedesktop.org" X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dri-devel-bounces@lists.freedesktop.org Errors-To: dri-devel-bounces@lists.freedesktop.org X-Spam-Status: No, score=-4.3 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 Not holding the mutex potentially causes corruption of the kernel channel when page flipping. Cc: stable@vger.kernel.org #3.13 Signed-off-by: Maarten Lankhorst diff --git a/drivers/gpu/drm/nouveau/nouveau_display.c b/drivers/gpu/drm/nouveau/nouveau_display.c index 29c3efdfc7dd..76e3cf025c10 100644 --- a/drivers/gpu/drm/nouveau/nouveau_display.c +++ b/drivers/gpu/drm/nouveau/nouveau_display.c @@ -603,6 +603,14 @@ nouveau_crtc_page_flip(struct drm_crtc *crtc, struct drm_framebuffer *fb, if (!s) return -ENOMEM; + if (new_bo != old_bo) { + ret = nouveau_bo_pin(new_bo, TTM_PL_FLAG_VRAM); + if (ret) + goto fail_free; + } + + mutex_lock(&chan->cli->mutex); + /* synchronise rendering channel with the kernel's channel */ spin_lock(&new_bo->bo.bdev->fence_lock); fence = nouveau_fence_ref(new_bo->bo.sync_obj); @@ -612,13 +620,6 @@ nouveau_crtc_page_flip(struct drm_crtc *crtc, struct drm_framebuffer *fb, if (ret) return ret; - if (new_bo != old_bo) { - ret = nouveau_bo_pin(new_bo, TTM_PL_FLAG_VRAM); - if (ret) - goto fail_free; - } - - mutex_lock(&chan->cli->mutex); ret = ttm_bo_reserve(&old_bo->bo, true, false, false, NULL); if (ret) goto fail_unpin;