iommu/vt-d: Remove duplicated code for device hotplug

The iommu generic code has handled the device hotplug cases.
Remove the duplicated code.

Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index ff46227..007aac5 100644 (file)
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -4548,39 +4548,6 @@ int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info)
        return 0;
 }
 
-/*
- * Here we only respond to action of unbound device from driver.
- *
- * Added device is not attached to its DMAR domain here yet. That will happen
- * when mapping the device to iova.
- */
-static int device_notifier(struct notifier_block *nb,
-                                 unsigned long action, void *data)
-{
-       struct device *dev = data;
-       struct dmar_domain *domain;
-
-       if (iommu_dummy(dev))
-               return 0;
-
-       if (action == BUS_NOTIFY_REMOVED_DEVICE) {
-               domain = find_domain(dev);
-               if (!domain)
-                       return 0;
-
-               dmar_remove_one_dev_info(dev);
-       } else if (action == BUS_NOTIFY_ADD_DEVICE) {
-               if (iommu_should_identity_map(dev))
-                       domain_add_dev_info(si_domain, dev);
-       }
-
-       return 0;
-}
-
-static struct notifier_block device_nb = {
-       .notifier_call = device_notifier,
-};
-
 static int intel_iommu_memory_notifier(struct notifier_block *nb,
                                       unsigned long val, void *v)
 {
@@ -4955,7 +4922,6 @@ int __init intel_iommu_init(void)
        }
 
        bus_set_iommu(&pci_bus_type, &intel_iommu_ops);
-       bus_register_notifier(&pci_bus_type, &device_nb);
        if (si_domain && !hw_pass_through)
                register_memory_notifier(&intel_iommu_memory_nb);
        cpuhp_setup_state(CPUHP_IOMMU_INTEL_DEAD, "iommu/intel:dead", NULL,