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From:   Robin Murphy <robin.murphy@arm.com>
To:     joro@8bytes.org, will@kernel.org
Cc:     iommu@lists.linux-foundation.org, sven@svenpeter.dev,
        robdclark@gmail.com, m.szyprowski@samsung.com,
        baolu.lu@linux.intel.com, yong.wu@mediatek.com,
        mjrosato@linux.ibm.com, gerald.schaefer@linux.ibm.com,
        zhang.lyra@gmail.com, thierry.reding@gmail.com, vdumpa@nvidia.com,
        jean-philippe@linaro.org, linux-arm-kernel@lists.infradead.org,
        linux-kernel@vger.kernel.org
Subject: [PATCH 12/13] iommu/virtio: Clean up bus_set_iommu()
Date:   Thu, 14 Apr 2022 13:42:41 +0100
Message-Id: <4db34a35e07f3741a658465045b78c96a569c591.1649935679.git.robin.murphy@arm.com>
In-Reply-To: <cover.1649935679.git.robin.murphy@arm.com>
References: <cover.1649935679.git.robin.murphy@arm.com>
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Stop calling bus_set_iommu() since it's now unnecessary, and simplify
the probe failure path accordingly.

Signed-off-by: Robin Murphy <robin.murphy@arm.com>
---
 drivers/iommu/virtio-iommu.c | 24 ------------------------
 1 file changed, 24 deletions(-)

diff --git a/drivers/iommu/virtio-iommu.c b/drivers/iommu/virtio-iommu.c
index 25be4b822aa0..371f8657c0ce 100644
--- a/drivers/iommu/virtio-iommu.c
+++ b/drivers/iommu/virtio-iommu.c
@@ -7,7 +7,6 @@
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 
-#include <linux/amba/bus.h>
 #include <linux/delay.h>
 #include <linux/dma-iommu.h>
 #include <linux/dma-map-ops.h>
@@ -1146,26 +1145,6 @@ static int viommu_probe(struct virtio_device *vdev)
 
 	iommu_device_register(&viommu->iommu, &viommu_ops, parent_dev);
 
-#ifdef CONFIG_PCI
-	if (pci_bus_type.iommu_ops != &viommu_ops) {
-		ret = bus_set_iommu(&pci_bus_type, &viommu_ops);
-		if (ret)
-			goto err_unregister;
-	}
-#endif
-#ifdef CONFIG_ARM_AMBA
-	if (amba_bustype.iommu_ops != &viommu_ops) {
-		ret = bus_set_iommu(&amba_bustype, &viommu_ops);
-		if (ret)
-			goto err_unregister;
-	}
-#endif
-	if (platform_bus_type.iommu_ops != &viommu_ops) {
-		ret = bus_set_iommu(&platform_bus_type, &viommu_ops);
-		if (ret)
-			goto err_unregister;
-	}
-
 	vdev->priv = viommu;
 
 	dev_info(dev, "input address: %u bits\n",
@@ -1174,9 +1153,6 @@ static int viommu_probe(struct virtio_device *vdev)
 
 	return 0;
 
-err_unregister:
-	iommu_device_sysfs_remove(&viommu->iommu);
-	iommu_device_unregister(&viommu->iommu);
 err_free_vqs:
 	vdev->config->del_vqs(vdev);
 
-- 
2.28.0.dirty