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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id CDE55C5DF85 for ; Wed, 19 Aug 2026 08:59:45 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 144CA10E2A7; Wed, 19 Aug 2026 08:59:45 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.b="NaUdJ3wR"; dkim-atps=neutral Received: from tor.source.kernel.org (tor.source.kernel.org [172.105.4.254]) by gabe.freedesktop.org (Postfix) with ESMTPS id 7599D10E0EF for ; Wed, 19 Aug 2026 08:59:43 +0000 (UTC) Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id BA45960A59; Wed, 19 Aug 2026 08:59:42 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 081A01F000E9; Wed, 19 Aug 2026 08:59:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1787129982; bh=ItqsQqr3Mw5di8UE7G1EmM2BT6q0WeQmkLoEXShbbD4=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=NaUdJ3wRncPPie/MeFyQ613etesuJ9JbG53/B2sAIXT5h7OCyjLupm3JeT4g71AuU y6qc05qK9/J/L7l3QjIWT35oocQt1gDK03+jRl71nsjie/LNZdqrpQ+peA9kvbMNI0 0YiepHfX2MyUR7nmOY/89hkIeWggzHVQhC0zY5XkeH1j5gnJASfbfZCKqV/M/Rge1/ lpUQShV/4NLSVL14i95NJqDlQi/h+OeY7mk3jvVcV7FzDtqOF3k6QK583VLAG88FZL ul21fuWZdJPHr+I9d37Wuf3lLC9BwX/+DlF4yAu5CSL93eYkMDbeji3Vw/FtCp4uYc mWImDn03z5vQg== Message-ID: <4b5b6dda-43a4-4488-9dbd-b0f92fcead61@kernel.org> Date: Wed, 19 Aug 2026 10:59:39 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 1/9] dma-buf: add dma_fence_was_initialized function v2 To: phasta@kernel.org, =?UTF-8?Q?Christian_K=C3=B6nig?= , tursulin@ursulin.net, matthew.brost@intel.com, sumit.semwal@linaro.org Cc: dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org References: <20260120105655.7134-1-christian.koenig@amd.com> <20260120105655.7134-2-christian.koenig@amd.com> <0d40243b-0929-46d2-be85-e3248d4bd09c@kernel.org> <9edeaa17aebc284f1f171b1dd4d9ffee4721b750.camel@mailbox.org> Content-Language: en-US From: Jiri Slaby Autocrypt: addr=jirislaby@kernel.org; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" On 14. 07. 26, 10:43, Philipp Stanner wrote: > On Tue, 2026-07-14 at 09:53 +0200, Philipp Stanner wrote: >> On Mon, 2026-07-13 at 10:58 +0200, Jiri Slaby wrote: >>> Hi, >>> >>> On 20. 01. 26, 11:54, Christian König wrote: >>>> Some driver use fence->ops to test if a fence was initialized or not. >>>> The problem is that this utilizes internal behavior of the dma_fence >>>> implementation. >>>> >>>> So better abstract that into a function. >>>> >>>> v2: use a flag instead of testing fence->ops, rename the function, move >>>>      to the beginning of the patch set. >>> ... >>>> --- a/drivers/gpu/drm/qxl/qxl_release.c >>>> +++ b/drivers/gpu/drm/qxl/qxl_release.c >>>> @@ -146,7 +146,7 @@ qxl_release_free(struct qxl_device *qdev, >>>>    idr_remove(&qdev->release_idr, release->id); >>>>    spin_unlock(&qdev->release_idr_lock); >>>> >>>> - if (release->base.ops) { >>>> + if (dma_fence_was_initialized(&release->base)) { >> >> Could you verify the cause with sth like >> >> if (release->base.ops && dma_fence_was_initialized(…)) { > > Forget about that, probably would not work or cause other issues > because the NULL-setting on signal(). > > I'd then probably try to verify it with a separate boolean in struct > release. Though I also don't get why the fence-initialized check does > not do the trick. Hi, have you come up with something yet? thanks, -- js suse labs