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 396F2C61DC6 for ; Fri, 28 Aug 2026 08:32:26 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 757A610F2C6; Fri, 28 Aug 2026 08:32:25 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.b="KVuSRKrj"; dkim-atps=neutral Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by gabe.freedesktop.org (Postfix) with ESMTPS id 1BDCC10F2C6 for ; Fri, 28 Aug 2026 08:32:24 +0000 (UTC) Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id B1CC140A8E; Fri, 28 Aug 2026 08:32:23 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 293861F000E9; Fri, 28 Aug 2026 08:32:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1787905943; bh=Zv1DRd1QBpOJii2LcicJKvonXRm+3QBrvsCn8l+2EBE=; h=Date:Subject:From:To:Cc:References:In-Reply-To; b=KVuSRKrjTnnktaKUJ1kocZOI3xEI7YJQS7ziLWTnqtIHDuCaFrL6JFAdhNkWWf4nL mo2C/1mH1aeVGffYSCdFVO5bCop49aS8PuQcecncHI/viIIOhCjZ2/1UqeykoO3t4y 8AKhnHAOF/aYRef819Edv9fIVWNRM6ZHQm6fsUy9r92CSutXjmlm5gg/kPwvM99iSj dw09mxnNGOSSKDNMNaALF5rOdpVWSjp+80QHm1xfZDjAcHGqHeVXR0BHK9kHl6AWoi 7XOXJeUS9u60xMBXNYbSbNhVA4z+jt6VpT2SnfSiDqUb2f6tjDKpWTlsgl26mekHHM Q4MaGA7BFADWA== Message-ID: Date: Fri, 28 Aug 2026 10:32:20 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 1/9] dma-buf: add dma_fence_was_initialized function v2 From: Jiri Slaby 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> <4b5b6dda-43a4-4488-9dbd-b0f92fcead61@kernel.org> <0b84716fa6bec4e38d811dc76926dd81e31e0c81.camel@mailbox.org> <5dd4248bccb446ef390e7149649632657db4aaae.camel@mailbox.org> <0df59c80-ae58-47d3-a96b-e878a17766a7@kernel.org> Content-Language: en-US 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 28. 08. 26, 9:46, Jiri Slaby wrote: > What helps is indeed the revert back to: > > --- a/drivers/gpu/drm/qxl/qxl_release.c > +++ b/drivers/gpu/drm/qxl/qxl_release.c > @@ -147,7 +147,7 @@ qxl_release_free(struct qxl_device *qdev, >         idr_remove(&qdev->release_idr, release->id); >         spin_unlock(&qdev->release_idr_lock); > > -       if (dma_fence_was_initialized(&release->base)) { > +       if (release->base.ops) { Crap, the flags simple got garbage from previous freed buffer, so: - release = kmalloc(size, GFP_KERNEL); + release = kzalloc(size, GFP_KERNEL); fixes this of course. Patch coming. Now, the ops and initialized are either both set or unset: qxl_release_free 1: release->base.ops=0x0 initialized=0 id=6 type=2 qxl_release_free 1: release->base.ops=qxl_fence_ops initialized=1 id=2 type=0 Unlike before. FTR release->base.ops were NULLed after that kmalloc. Unlike release->base.flags. thanks, -- js suse labs