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>

1 files changed, 0 insertions, 34 deletions

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index ff46227b3409..007aac554b37 100644
--- 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,