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=-9.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable 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 AAB67C433E2 for ; Sun, 13 Sep 2020 03:14:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 685E720732 for ; Sun, 13 Sep 2020 03:14:52 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="DSkn8ROU" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725932AbgIMDOt (ORCPT ); Sat, 12 Sep 2020 23:14:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53028 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725908AbgIMDOq (ORCPT ); Sat, 12 Sep 2020 23:14:46 -0400 Received: from mail-oi1-x244.google.com (mail-oi1-x244.google.com [IPv6:2607:f8b0:4864:20::244]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2142CC061573 for ; Sat, 12 Sep 2020 20:14:46 -0700 (PDT) Received: by mail-oi1-x244.google.com with SMTP id y6so13881766oie.5 for ; Sat, 12 Sep 2020 20:14:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=eCqlMmeFwnaJqMzKobKwxzuAcoUu5Y/KrYbNh4cg/CI=; b=DSkn8ROU3zelVpsj2ReGD/hlM9SmL8+oVHeuo55D3Ic0A6eMcy5rkmr99lJJzVFgZo 8gUsA0TI+kmEXjjmeOQh6QNCZsbI8E0b1I14BakseeoBK2LIdqXrPdEhoSKSLbp2Bu3K +UyKDxO97lMNDMcpJjVvVQbFBCEgJx5kcua5mSGE/Pq859gjwaGn+Lec2G++4Z/wS1dK WJYf5gt/PDgM/aZR5xORixMOF17AHJ0KiYoJEfUouANo012fcDfXjes/jUKVdWG3j7W7 4+VD16X+/V971rzUV+N6mXkdlnh1T1e+9WTMD1pZCBXxiqky3Rl+zcxN0EcbPRrHC1+S r5sw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=eCqlMmeFwnaJqMzKobKwxzuAcoUu5Y/KrYbNh4cg/CI=; b=iLmq+BLYM2n16o39wL9BqOrygZb8Nv7VdQsmtGS2zW7kOAGnppQ3qNGM3hdgwRZ4PG Mwpeqhy4qFX+geLl5gZSp2i+DQYJXxL2V+PiVhvr1vMejhXhJgvfEUgDh6L4T0waslWG 4/b691a1husHboaWDVf+HMWLgz7Y9oouIi2iIRvdbbW7ErSgVM1RAomiS7V0g31wyzuI AS+hoZC6b0swAxLF6cbbRWDwG41V7FKEUnfrbTbnN0iE7tFXU6nGD+q8gfc5LMonVKNQ gXdHDmuqYxUULSK4Rtv315UeEHUjmyn7iD+ydEqo/iBLPm+ieljStuELsa3zst9qqR43 Xu+w== X-Gm-Message-State: AOAM530hbMeTtPlgCFBQq0F3rlXQoUJSdpNySHid8/5Fx57D2+UCpnzo hTQB/ppP4l9304pZZPvN2d+y5w== X-Google-Smtp-Source: ABdhPJwbeFPrbjxKAQIpdugGlybxZzVcWEtLsjEIfZtzkecp8+WvSdNWhEUJeeUEm54+jzLXONtJoQ== X-Received: by 2002:a05:6808:601:: with SMTP id y1mr5490419oih.9.1599966885546; Sat, 12 Sep 2020 20:14:45 -0700 (PDT) Received: from yoga ([2605:6000:e5cb:c100:8898:14ff:fe6d:34e]) by smtp.gmail.com with ESMTPSA id w19sm1192469otq.70.2020.09.12.20.14.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 12 Sep 2020 20:14:44 -0700 (PDT) Date: Sat, 12 Sep 2020 22:14:42 -0500 From: Bjorn Andersson To: Luca Weiss Cc: freedreno@lists.freedesktop.org, ~postmarketos/upstreaming@lists.sr.ht, Rob Clark , Sean Paul , David Airlie , Daniel Vetter , Jordan Crouse , Jonathan Marek , Brian Masney , John Stultz , linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] drm/msm/adreno: fix probe without iommu Message-ID: <20200913031442.GS3715@yoga> References: <20200911160854.484114-1-luca@z3ntu.xyz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200911160854.484114-1-luca@z3ntu.xyz> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri 11 Sep 11:08 CDT 2020, Luca Weiss wrote: > The function iommu_domain_alloc returns NULL on platforms without IOMMU > such as msm8974. This resulted in PTR_ERR(-ENODEV) being assigned to > gpu->aspace so the correct code path wasn't taken. > > Fixes: ccac7ce373c1 ("drm/msm: Refactor address space initialization") > Signed-off-by: Luca Weiss Reviewed-by: Bjorn Andersson > --- > drivers/gpu/drm/msm/adreno/adreno_gpu.c | 10 ++++++++-- > 1 file changed, 8 insertions(+), 2 deletions(-) > > diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c b/drivers/gpu/drm/msm/adreno/adreno_gpu.c > index 862dd35b27d3..6e8bef1a9ea2 100644 > --- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c > +++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c > @@ -189,10 +189,16 @@ struct msm_gem_address_space * > adreno_iommu_create_address_space(struct msm_gpu *gpu, > struct platform_device *pdev) > { > - struct iommu_domain *iommu = iommu_domain_alloc(&platform_bus_type); > - struct msm_mmu *mmu = msm_iommu_new(&pdev->dev, iommu); > + struct iommu_domain *iommu; > + struct msm_mmu *mmu; > struct msm_gem_address_space *aspace; > > + iommu = iommu_domain_alloc(&platform_bus_type); > + if (!iommu) > + return NULL; > + > + mmu = msm_iommu_new(&pdev->dev, iommu); > + > aspace = msm_gem_address_space_create(mmu, "gpu", SZ_16M, > 0xffffffff - SZ_16M); > > -- > 2.28.0 >