[PATCH v3 05/15] iommu/amd: Clean up bus_set_iommu()

@@ -18,7 +18,6 @@ extern void amd_iommu_restart_event_logging(struct amd_iommu *iommu);
 extern int amd_iommu_init_devices(void);
 extern void amd_iommu_uninit_devices(void);
 extern void amd_iommu_init_notifier(void);
-extern int amd_iommu_init_api(void);
 
 #ifdef CONFIG_AMD_IOMMU_DEBUGFS
 void amd_iommu_debugfs_setup(struct amd_iommu *iommu);

@@ -1969,20 +1969,13 @@ static int __init amd_iommu_init_pci(void)
 	/*
 	 * Order is important here to make sure any unity map requirements are
 	 * fulfilled. The unity mappings are created and written to the device
-	 * table during the amd_iommu_init_api() call.
+	 * table during the iommu_init_pci() call.
 	 *
 	 * After that we call init_device_table_dma() to make sure any
 	 * uninitialized DTE will block DMA, and in the end we flush the caches
 	 * of all IOMMUs to make sure the changes to the device table are
 	 * active.
 	 */
-	ret = amd_iommu_init_api();
-	if (ret) {
-		pr_err("IOMMU: Failed to initialize IOMMU-API interface (error=%d)!\n",
-		       ret);
-		goto out;
-	}
-
 	init_device_table_dma();
 
 	for_each_iommu(iommu)

@@ -11,8 +11,6 @@
 #include <linux/ratelimit.h>
 #include <linux/pci.h>
 #include <linux/acpi.h>
-#include <linux/amba/bus.h>
-#include <linux/platform_device.h>
 #include <linux/pci-ats.h>
 #include <linux/bitmap.h>
 #include <linux/slab.h>

@@ -1842,25 +1840,6 @@ void amd_iommu_domain_update(struct protection_domain *domain)
 	amd_iommu_domain_flush_complete(domain);
 }
 
-int __init amd_iommu_init_api(void)
-{
-	int err;
-
-	err = bus_set_iommu(&pci_bus_type, &amd_iommu_ops);
-	if (err)
-		return err;
-#ifdef CONFIG_ARM_AMBA
-	err = bus_set_iommu(&amba_bustype, &amd_iommu_ops);
-	if (err)
-		return err;
-#endif
-	err = bus_set_iommu(&platform_bus_type, &amd_iommu_ops);
-	if (err)
-		return err;
-
-	return 0;
-}
-
 /*****************************************************************************
  *
  * The following functions belong to the exported interface of AMD IOMMU