Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756555AbaGIMad (ORCPT ); Wed, 9 Jul 2014 08:30:33 -0400 Received: from adelie.canonical.com ([91.189.90.139]:44998 "EHLO adelie.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755360AbaGIMa2 (ORCPT ); Wed, 9 Jul 2014 08:30:28 -0400 Subject: [PATCH 14/17] drm/nouveau: use rcu in nouveau_gem_ioctl_cpu_prep To: airlied@linux.ie From: Maarten Lankhorst 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 Date: Wed, 09 Jul 2014 14:30:23 +0200 Message-ID: <20140709123023.11354.45654.stgit@patser> In-Reply-To: <20140709093124.11354.3774.stgit@patser> References: <20140709093124.11354.3774.stgit@patser> User-Agent: StGit/0.15 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org With the conversion to the reservation api this should be safe. Signed-off-by: Maarten Lankhorst --- drivers/gpu/drm/nouveau/nouveau_gem.c | 28 ++++++++++++---------------- 1 file changed, 12 insertions(+), 16 deletions(-) diff --git a/drivers/gpu/drm/nouveau/nouveau_gem.c b/drivers/gpu/drm/nouveau/nouveau_gem.c index 4beaa897adad..c2ca894f6507 100644 --- a/drivers/gpu/drm/nouveau/nouveau_gem.c +++ b/drivers/gpu/drm/nouveau/nouveau_gem.c @@ -863,33 +863,29 @@ nouveau_gem_ioctl_cpu_prep(struct drm_device *dev, void *data, struct drm_gem_object *gem; struct nouveau_bo *nvbo; bool no_wait = !!(req->flags & NOUVEAU_GEM_CPU_PREP_NOWAIT); + bool write = !!(req->flags & NOUVEAU_GEM_CPU_PREP_WRITE); int ret; - struct nouveau_fence *fence = NULL; gem = drm_gem_object_lookup(dev, file_priv, req->handle); if (!gem) return -ENOENT; nvbo = nouveau_gem_object(gem); - ret = ttm_bo_reserve(&nvbo->bo, true, false, false, 0); - if (!ret) { - ret = ttm_bo_wait(&nvbo->bo, true, true, true); - if (!no_wait && ret) { - struct fence *excl; - - excl = reservation_object_get_excl(nvbo->bo.resv); - fence = nouveau_fence_ref((struct nouveau_fence *)excl); - } + if (no_wait) + ret = reservation_object_test_signaled_rcu(nvbo->bo.resv, write) ? 0 : -EBUSY; + else { + long lret; - ttm_bo_unreserve(&nvbo->bo); + lret = reservation_object_wait_timeout_rcu(nvbo->bo.resv, write, true, 30 * HZ); + if (!lret) + ret = -EBUSY; + else if (lret > 0) + ret = 0; + else + ret = lret; } drm_gem_object_unreference_unlocked(gem); - if (fence) { - ret = nouveau_fence_wait(fence, true, no_wait); - nouveau_fence_unref(&fence); - } - return ret; } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/