From patchwork Tue Apr 5 14:19:53 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Robin Murphy X-Patchwork-Id: 12801588 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 38E0FC433EF for ; Tue, 5 Apr 2022 14:20:00 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 5CD0F10E8BA; Tue, 5 Apr 2022 14:19:59 +0000 (UTC) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by gabe.freedesktop.org (Postfix) with ESMTP id 31DA710E1AA for ; Tue, 5 Apr 2022 14:19:58 +0000 (UTC) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 7974B1474; Tue, 5 Apr 2022 07:19:57 -0700 (PDT) Received: from e121345-lin.cambridge.arm.com (e121345-lin.cambridge.arm.com [10.1.196.40]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id A8F723F5A1; Tue, 5 Apr 2022 07:19:56 -0700 (PDT) From: Robin Murphy To: thierry.reding@gmail.com Subject: [PATCH] drm/tegra: Stop using iommu_present() Date: Tue, 5 Apr 2022 15:19:53 +0100 Message-Id: <25247f43672df0aa58c1952bf3df2bf948e9f8ae.1649168393.git.robin.murphy@arm.com> X-Mailer: git-send-email 2.28.0.dirty MIME-Version: 1.0 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: , Cc: linux-tegra@vger.kernel.org, iommu@lists.linux-foundation.org, dri-devel@lists.freedesktop.org, jonathanh@nvidia.com Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Remove the pointless check. host1x_drm_wants_iommu() cannot return true unless an IOMMU exists for the host1x platform device, which at the moment means the iommu_present() test could never fail. Signed-off-by: Robin Murphy --- drivers/gpu/drm/tegra/drm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c index 9464f522e257..bc4321561400 100644 --- a/drivers/gpu/drm/tegra/drm.c +++ b/drivers/gpu/drm/tegra/drm.c @@ -1149,7 +1149,7 @@ static int host1x_drm_probe(struct host1x_device *dev) goto put; } - if (host1x_drm_wants_iommu(dev) && iommu_present(&platform_bus_type)) { + if (host1x_drm_wants_iommu(dev)) { tegra->domain = iommu_domain_alloc(&platform_bus_type); if (!tegra->domain) { err = -ENOMEM;