From patchwork Wed Dec 4 16:45:27 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chris Wilson X-Patchwork-Id: 11273297 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B6CB1930 for ; Wed, 4 Dec 2019 16:45:37 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 9FB122081B for ; Wed, 4 Dec 2019 16:45:37 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9FB122081B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=chris-wilson.co.uk Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 2B45D6E931; Wed, 4 Dec 2019 16:45:37 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from fireflyinternet.com (mail.fireflyinternet.com [109.228.58.192]) by gabe.freedesktop.org (Postfix) with ESMTPS id 6EFDA6E931 for ; Wed, 4 Dec 2019 16:45:35 +0000 (UTC) X-Default-Received-SPF: pass (skip=forwardok (res=PASS)) x-ip-name=78.156.65.138; Received: from haswell.alporthouse.com (unverified [78.156.65.138]) by fireflyinternet.com (Firefly Internet (M1)) with ESMTP id 19459638-1500050 for multiple; Wed, 04 Dec 2019 16:45:26 +0000 From: Chris Wilson To: intel-gfx@lists.freedesktop.org Date: Wed, 4 Dec 2019 16:45:27 +0000 Message-Id: <20191204164527.3872783-1-chris@chris-wilson.co.uk> X-Mailer: git-send-email 2.24.0 MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH] drm/i915/gem: Hold the obj->vma.lock while walking the vma.list X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Matthew Auld Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Remember to take the lock before walking the obj->vma.list so that the nodes do not change beneath us! E.g., i915_gem_object_bump_inactive_ggtt: i915_gem_object_bump_inactive_ggtt:387 GEM_BUG_ON(vma->vm != &i915->ggtt.vm) Closes: https://gitlab.freedesktop.org/drm/intel/issues/691 Signed-off-by: Chris Wilson Cc: Matthew Auld Reviewed-by: Matthew Auld --- drivers/gpu/drm/i915/gem/i915_gem_domain.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/i915/gem/i915_gem_domain.c b/drivers/gpu/drm/i915/gem/i915_gem_domain.c index f2064950622b..808eb327a29b 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_domain.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_domain.c @@ -379,8 +379,11 @@ static void i915_gem_object_bump_inactive_ggtt(struct drm_i915_gem_object *obj) struct i915_vma *vma; GEM_BUG_ON(!i915_gem_object_has_pinned_pages(obj)); + if (!atomic_read(&obj->bind_count)) + return; mutex_lock(&i915->ggtt.vm.mutex); + spin_lock(&obj->vma.lock); for_each_ggtt_vma(vma, obj) { if (!drm_mm_node_allocated(&vma->node)) continue; @@ -388,6 +391,7 @@ static void i915_gem_object_bump_inactive_ggtt(struct drm_i915_gem_object *obj) GEM_BUG_ON(vma->vm != &i915->ggtt.vm); list_move_tail(&vma->vm_link, &vma->vm->bound_list); } + spin_unlock(&obj->vma.lock); mutex_unlock(&i915->ggtt.vm.mutex); if (i915_gem_object_is_shrinkable(obj)) {