From patchwork Mon Jun 25 10:06:03 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chris Wilson X-Patchwork-Id: 10485441 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id E8DA9603B5 for ; Mon, 25 Jun 2018 10:06:21 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D8EF0288CF for ; Mon, 25 Jun 2018 10:06:21 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id CBE50288DD; Mon, 25 Jun 2018 10:06:21 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 73403288CF for ; Mon, 25 Jun 2018 10:06:21 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id B59D96E16A; Mon, 25 Jun 2018 10:06:20 +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 C65226E16A for ; Mon, 25 Jun 2018 10:06:19 +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 12149942-1500050 for multiple; Mon, 25 Jun 2018 11:06:03 +0100 Received: by haswell.alporthouse.com (sSMTP sendmail emulation); Mon, 25 Jun 2018 11:06:04 +0100 From: Chris Wilson To: intel-gfx@lists.freedesktop.org Date: Mon, 25 Jun 2018 11:06:03 +0100 Message-Id: <20180625100604.22598-1-chris@chris-wilson.co.uk> X-Mailer: git-send-email 2.18.0 X-Originating-IP: 78.156.65.138 X-Country: code=GB country="United Kingdom" ip=78.156.65.138 Subject: [Intel-gfx] [PATCH 1/2] drm/i915/execlists: Check for ce->state before destroy 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: , MIME-Version: 1.0 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Virus-Scanned: ClamAV using ClamSMTP As we may cancel the ce->state allocation during context pinning (but crucially after we mark ce as operational), that means we may be asked to destroy a nonexistent ce->state. Given the choice in handing a complex error path on pinning, and just ignoring the lack of state in destroy, choice the latter for simplicity. Reported-by: Zhao Yakui Signed-off-by: Chris Wilson Cc: Tvrtko Ursulin Reviewed-by: Tvrtko Ursulin --- drivers/gpu/drm/i915/intel_lrc.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c index 33bc914c2ef5..97460ee25b7d 100644 --- a/drivers/gpu/drm/i915/intel_lrc.c +++ b/drivers/gpu/drm/i915/intel_lrc.c @@ -1337,9 +1337,11 @@ static void execlists_schedule(struct i915_request *request, static void execlists_context_destroy(struct intel_context *ce) { - GEM_BUG_ON(!ce->state); GEM_BUG_ON(ce->pin_count); + if (!ce->state) + return; + intel_ring_free(ce->ring); __i915_gem_object_release_unless_active(ce->state->obj); }