From patchwork Tue Jul 5 17:08:36 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Robin Murphy X-Patchwork-Id: 12906886 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 A4969C433EF for ; Tue, 5 Jul 2022 17:13:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=Em3D7i/xgTSYu7+s/zY9X/eF4UnVN/QTadd8t0Emr3k=; b=qePHhBOTYdPWM6 /ThmSAqb60y9XFoZSbpgvH9wWcc8iSriPaztYdGKJ7H5ZVKOlQj7kfiOg7d6Ra40E+uuNrdjZB0TJ 8+LuNgONJNrPcJSMQGFXhDS50tbLVbbuq+fBgj+vvg4dnpYGFlG08U8wZ2FysZ58N3OT62kO9UBxz bNIMiGSjKENoGAZPD/g+LPz/WbuK25es7CSpp0BQXdqug52jP1fzUNzvqvVufK1wPJdha8iqdQCZq vuGoS4KicbD6vpjjfpvQmYxZ1Q2yK6/wI/HzDFM3S6aFNmQvly5se5YVG/7k3s88x5J4DzOJ36q6p xIGEcxyx/MeU1me6GdjQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1o8m6U-001jEC-UO; Tue, 05 Jul 2022 17:12:51 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1o8m2t-001gQY-Ay for linux-arm-kernel@lists.infradead.org; Tue, 05 Jul 2022 17:09:09 +0000 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 B9F1C1595; Tue, 5 Jul 2022 10:09:06 -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 DABC03F66F; Tue, 5 Jul 2022 10:09:04 -0700 (PDT) From: Robin Murphy To: joro@8bytes.org Cc: will@kernel.org, iommu@lists.linux.dev, linux-arm-kernel@lists.infradead.org, baolu.lu@linux.intel.com, suravee.suthikulpanit@amd.com, vasant.hegde@amd.com, mjrosato@linux.ibm.com, gerald.schaefer@linux.ibm.com, schnelle@linux.ibm.com, linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 13/15] iommu/tegra-smmu: Clean up bus_set_iommu() Date: Tue, 5 Jul 2022 18:08:36 +0100 Message-Id: <226d48b93ae94947630ecc237d399f6e2efed0ee.1657034828.git.robin.murphy@arm.com> X-Mailer: git-send-email 2.36.1.dirty In-Reply-To: References: MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220705_100907_503949_3A33156E X-CRM114-Status: GOOD ( 13.07 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Stop calling bus_set_iommu() since it's now unnecessary, and simplify the probe failure path accordingly. Signed-off-by: Robin Murphy --- v3: No change drivers/iommu/tegra-smmu.c | 29 ++++++----------------------- 1 file changed, 6 insertions(+), 23 deletions(-) diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c index 1fea68e551f1..2e4d2e4c65bb 100644 --- a/drivers/iommu/tegra-smmu.c +++ b/drivers/iommu/tegra-smmu.c @@ -1086,8 +1086,8 @@ struct tegra_smmu *tegra_smmu_probe(struct device *dev, /* * This is a bit of a hack. Ideally we'd want to simply return this - * value. However the IOMMU registration process will attempt to add - * all devices to the IOMMU when bus_set_iommu() is called. In order + * value. However iommu_device_register() will attempt to add + * all devices to the IOMMU before we get that far. In order * not to rely on global variables to track the IOMMU instance, we * set it here so that it can be looked up from the .probe_device() * callback via the IOMMU device's .drvdata field. @@ -1141,32 +1141,15 @@ struct tegra_smmu *tegra_smmu_probe(struct device *dev, return ERR_PTR(err); err = iommu_device_register(&smmu->iommu, &tegra_smmu_ops, dev); - if (err) - goto remove_sysfs; - - err = bus_set_iommu(&platform_bus_type, &tegra_smmu_ops); - if (err < 0) - goto unregister; - -#ifdef CONFIG_PCI - err = bus_set_iommu(&pci_bus_type, &tegra_smmu_ops); - if (err < 0) - goto unset_platform_bus; -#endif + if (err) { + iommu_device_sysfs_remove(&smmu->iommu); + return ERR_PTR(err); + } if (IS_ENABLED(CONFIG_DEBUG_FS)) tegra_smmu_debugfs_init(smmu); return smmu; - -unset_platform_bus: __maybe_unused; - bus_set_iommu(&platform_bus_type, NULL); -unregister: - iommu_device_unregister(&smmu->iommu); -remove_sysfs: - iommu_device_sysfs_remove(&smmu->iommu); - - return ERR_PTR(err); } void tegra_smmu_remove(struct tegra_smmu *smmu)