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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>
This commit is contained in:
Lu Baolu 2019-05-25 13:41:35 +08:00 committed by Joerg Roedel
parent 0e31a72665
commit b7297783c2
1 changed files with 0 additions and 34 deletions
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34
drivers/iommu/intel-iommu.c
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@ -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,