From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B1E3DC433E2 for ; Tue, 23 Jun 2020 14:28:50 +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 91B882073E for ; Tue, 23 Jun 2020 14:28:50 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 91B882073E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com 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 231056E42A; Tue, 23 Jun 2020 14:28:50 +0000 (UTC) Received: from mblankhorst.nl (mblankhorst.nl [IPv6:2a02:2308::216:3eff:fe92:dfa3]) by gabe.freedesktop.org (Postfix) with ESMTPS id C65DB6E9A5 for ; Tue, 23 Jun 2020 14:28:48 +0000 (UTC) From: Maarten Lankhorst To: intel-gfx@lists.freedesktop.org Date: Tue, 23 Jun 2020 16:28:36 +0200 Message-Id: <20200623142843.423594-19-maarten.lankhorst@linux.intel.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200623142843.423594-1-maarten.lankhorst@linux.intel.com> References: <20200623142843.423594-1-maarten.lankhorst@linux.intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 19/26] drm/i915: Dirty hack to fix selftests locking inversion X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Some i915 selftests still use i915_vma_lock() as inner lock, and intel_context_create_request() intel_timeline->mutex as outer lock. Fortunately for selftests this is not an issue, they should be fixed but we can move ahead and cleanify lockdep now. Signed-off-by: Maarten Lankhorst --- drivers/gpu/drm/i915/gt/intel_context.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/gpu/drm/i915/gt/intel_context.c b/drivers/gpu/drm/i915/gt/intel_context.c index 64948386630f..fe9fff5a63b1 100644 --- a/drivers/gpu/drm/i915/gt/intel_context.c +++ b/drivers/gpu/drm/i915/gt/intel_context.c @@ -459,6 +459,18 @@ struct i915_request *intel_context_create_request(struct intel_context *ce) rq = i915_request_create(ce); intel_context_unpin(ce); + if (IS_ERR(rq)) + return rq; + + /* + * timeline->mutex should be the inner lock, but is used as outer lock. + * Hack around this to shut up lockdep in selftests.. + */ + lockdep_unpin_lock(&ce->timeline->mutex, rq->cookie); + mutex_release(&ce->timeline->mutex.dep_map, _RET_IP_); + mutex_acquire(&ce->timeline->mutex.dep_map, SINGLE_DEPTH_NESTING, 0, _RET_IP_); + rq->cookie = lockdep_pin_lock(&ce->timeline->mutex); + return rq; } -- 2.27.0 _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx