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Diffstat (limited to 'drivers/iommu')
-rw-r--r--drivers/iommu/dmar.c7
-rw-r--r--drivers/iommu/intel-iommu.c10
2 files changed, 15 insertions, 2 deletions
diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c
index 57c920c1372d..1ea7cd537873 100644
--- a/drivers/iommu/dmar.c
+++ b/drivers/iommu/dmar.c
@@ -801,13 +801,16 @@ int __init dmar_dev_scope_init(void)
dmar_free_pci_notify_info(info);
}
}
-
- bus_register_notifier(&pci_bus_type, &dmar_pci_bus_nb);
}
return dmar_dev_scope_status;
}
+void dmar_register_bus_notifier(void)
+{
+ bus_register_notifier(&pci_bus_type, &dmar_pci_bus_nb);
+}
+
int __init dmar_table_init(void)
{
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 6784a05dd6b2..934cef924461 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -4752,6 +4752,16 @@ int __init intel_iommu_init(void)
goto out_free_dmar;
}
+ up_write(&dmar_global_lock);
+
+ /*
+ * The bus notifier takes the dmar_global_lock, so lockdep will
+ * complain later when we register it under the lock.
+ */
+ dmar_register_bus_notifier();
+
+ down_write(&dmar_global_lock);
+
if (no_iommu || dmar_disabled) {
/*
* We exit the function here to ensure IOMMU's remapping and