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Thu, 10 Nov 2022 15:44:12 +0000 (GMT) Received: from eusmgms2.samsung.com (unknown [182.198.249.180]) by eusmtrp2.samsung.com (KnoxPortal) with ESMTP id 20221110154412eusmtrp201742c1069475873496966eb17dc1b29~mQ5zQbXZ32581425814eusmtrp2R; Thu, 10 Nov 2022 15:44:12 +0000 (GMT) X-AuditID: cbfec7f2-0b3ff70000002559-72-636d1c4d29d7 Received: from eusmtip1.samsung.com ( [203.254.199.221]) by eusmgms2.samsung.com (EUCPMTA) with SMTP id 4E.10.09026.C4C1D636; Thu, 10 Nov 2022 15:44:12 +0000 (GMT) Received: from AMDC2765.digital.local (unknown [106.120.51.73]) by eusmtip1.samsung.com (KnoxPortal) with ESMTPA id 20221110154412eusmtip1c91bac3ccf25c9263887bb4091735d2c~mQ5yycaMz2203222032eusmtip1N; Thu, 10 Nov 2022 15:44:12 +0000 (GMT) From: Marek Szyprowski To: iommu@lists.linux.dev, linux-samsung-soc@vger.kernel.org Cc: Marek Szyprowski , Joerg Roedel , Will Deacon , Krzysztof Kozlowski , Alim Akhtar , Sam Protsenko Subject: [PATCH v2] iommu/exynos: Fix driver initialization sequence Date: Thu, 10 Nov 2022 16:44:07 +0100 Message-Id: <20221110154407.26531-1-m.szyprowski@samsung.com> X-Mailer: git-send-email 2.17.1 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFnrFIsWRmVeSWpSXmKPExsWy7djP87q+MrnJBntm8Fg8mLeNzeLXFwuL ztkb2C32vt7KbjHj/D4mi7VH7rJbPO8DslrumDpweDw5OI/JY9OqTjaPO9f2sHm82DyT0aNv yypGj8+b5ALYorhsUlJzMstSi/TtErgyOtYaF1wUqtix8ztLA+MJ/i5GTg4JAROJpsWv2LsY uTiEBFYwSvxa+58RwvnCKHFxwVyozGdGiUPb/jDDtMy7PYcNIrGcUeLf9EYmuJaeZ6/BqtgE DCW63naxgdgiAjYSV04tAetgFvjLKHHt0hzWLkYODmEBF4m2XywgNSwCqhJPTp4Hq+cVsJVY vusAO8Q2eYnVGw4wg/RKCHRySMxrPckGkXCROHzxFAuELSzx6vgWqAYZif875zNBNLQzSiz4 fR/KmcAo0fD8FiNElbXEnXO/2ECuYBbQlFi/Sx8i7CjRv3wXM0hYQoBP4sZbQZAwM5A5adt0 qDCvREebEES1msSs4+vg1h68cAkaQh4SzxYtYgWxhQRiJRa3zmGcwCg3C2HXAkbGVYziqaXF uempxYZ5qeV6xYm5xaV56XrJ+bmbGIHJ4fS/4592MM599VHvECMTB+MhRgkOZiURXm6N7GQh 3pTEyqrUovz4otKc1OJDjNIcLErivGwztJKFBNITS1KzU1MLUotgskwcnFINTDHnnj7VSpm4 RUGD9ZHu0YLZpzw13a63Nm1Mvcx4zXHDJ7WNkou/Cqy70JdpXFgfP/eWnPoV/+tlB7a4/BIT t9Se/6VfPnrvx/4/C+NNTabHl93WFM/as6hSZOkasYwzpk4i6SULnq89bponscP3V1zIysxv fz3fyGmdDaudw7LmxH2mA0b9uqad/X3XOnsrhYI/733/eanwrjKLWr11oj/dDwrJ2cxXVrNP /LVl//MW7n9q5279feokHZG+/s3yWc45XS0778964/I1fR7PuSeHz7XN7Tgabhy6YDOvUX7c j9LA1Wwi/Ods2d+tDFLe3Hp9t8Nr58f1a803GdZfc/39yGxxz7GND363mAamximxFGckGmox FxUnAgBtpP8KfQMAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFtrPLMWRmVeSWpSXmKPExsVy+t/xu7o+MrnJBlPv6Vg8mLeNzeLXFwuL ztkb2C32vt7KbjHj/D4mi7VH7rJbPO8DslrumDpweDw5OI/JY9OqTjaPO9f2sHm82DyT0aNv yypGj8+b5ALYovRsivJLS1IVMvKLS2yVog0tjPQMLS30jEws9QyNzWOtjEyV9O1sUlJzMstS i/TtEvQyOtYaF1wUqtix8ztLA+MJ/i5GTg4JAROJebfnsHUxcnEICSxllLh0ZDsbREJG4uS0 BlYIW1jiz7UuqKJPjBJd2/aCJdgEDCW63naBNYgI2Elc+7yYGaSIWaCRSeLB+17GLkYODmEB F4m2XywgNSwCqhJPTp4Hq+cVsJVYvusAO8QCeYnVGw4wT2DkWcDIsIpRJLW0ODc9t9hIrzgx t7g0L10vOT93EyMwJLcd+7llB+PKVx/1DjEycTAeYpTgYFYS4eXWyE4W4k1JrKxKLcqPLyrN SS0+xGgKtG8is5Rocj4wKvJK4g3NDEwNTcwsDUwtzYyVxHk9CzoShQTSE0tSs1NTC1KLYPqY ODilGpj2dtienb695oHfeb6CVBNmmezlUapm2vcDJ7l9dd/bqnzqWMP2M1YnisrPNW813bfQ RJL5pM3jVwcqphse6K24sEFAI/Xzc1bFT9cafS++LpGx2uKzr/rXz8qFIvMXbNl6L3/3WoGg wlUc3cknt5wvjPUSnbdFiltjcntkSCH3yfVt8j4Rf6wst0XFZmk8XNThFfIrJGKf49ozwolL Lczuf7vg4+cV5rYjc1dbyNmeg5+Mbmq9u+fL+XKW7d3/L1QPc6onn3GJm+q2pr2wS81+6m+9 jhuP2MN33pz6e8bx5ENSE1ROz3f+Ze5aset0fvZDrvzqtCdtF85Ovl3yJvMwz5wb7EtuMnSc 6D755EKbEktxRqKhFnNRcSIAFMdDodICAAA= X-CMS-MailID: 20221110154412eucas1p26182a3d691584b577ddced9a1287df60 X-Msg-Generator: CA X-RootMTR: 20221110154412eucas1p26182a3d691584b577ddced9a1287df60 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20221110154412eucas1p26182a3d691584b577ddced9a1287df60 References: Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org Registering a SYSMMU platform driver might directly trigger initializing IOMMU domains and performing the initial mappings. Also the IOMMU core might use the IOMMU hardware once it has been registered with iommu_device_register() function. Ensure that all driver resources are allocated and initialized before the driver advertise its presence to the platform bus and the IOMMU subsystem. Signed-off-by: Marek Szyprowski --- drivers/iommu/exynos-iommu.c | 26 ++++++++++++-------------- 1 file changed, 12 insertions(+), 14 deletions(-) diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c index 45fd4850bacb..b0cde2211987 100644 --- a/drivers/iommu/exynos-iommu.c +++ b/drivers/iommu/exynos-iommu.c @@ -708,10 +708,6 @@ static int exynos_sysmmu_probe(struct platform_device *pdev) if (ret) return ret; - ret = iommu_device_register(&data->iommu, &exynos_iommu_ops, dev); - if (ret) - goto err_iommu_register; - platform_set_drvdata(pdev, data); if (PG_ENT_SHIFT < 0) { @@ -743,11 +739,13 @@ static int exynos_sysmmu_probe(struct platform_device *pdev) pm_runtime_enable(dev); + ret = iommu_device_register(&data->iommu, &exynos_iommu_ops, dev); + if (ret) + goto err_dma_set_mask; + return 0; err_dma_set_mask: - iommu_device_unregister(&data->iommu); -err_iommu_register: iommu_device_sysfs_remove(&data->iommu); return ret; } @@ -1432,12 +1430,6 @@ static int __init exynos_iommu_init(void) return -ENOMEM; } - ret = platform_driver_register(&exynos_sysmmu_driver); - if (ret) { - pr_err("%s: Failed to register driver\n", __func__); - goto err_reg_driver; - } - zero_lv2_table = kmem_cache_zalloc(lv2table_kmem_cache, GFP_KERNEL); if (zero_lv2_table == NULL) { pr_err("%s: Failed to allocate zero level2 page table\n", @@ -1446,10 +1438,16 @@ static int __init exynos_iommu_init(void) goto err_zero_lv2; } + ret = platform_driver_register(&exynos_sysmmu_driver); + if (ret) { + pr_err("%s: Failed to register driver\n", __func__); + goto err_reg_driver; + } + return 0; -err_zero_lv2: - platform_driver_unregister(&exynos_sysmmu_driver); err_reg_driver: + platform_driver_unregister(&exynos_sysmmu_driver); +err_zero_lv2: kmem_cache_destroy(lv2table_kmem_cache); return ret; }