iommu/vt-d: Remove dmar_global_lock from device_notifier

The code in the locked section does not touch anything
protected by the dmar_global_lock. Remove it from there.

Signed-off-by: Joerg Roedel <jroedel@suse.de>

1 files changed, 0 insertions, 2 deletions

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 0f258f0f5ac0..d55ef9df0879 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -4273,11 +4273,9 @@ static int device_notifier(struct notifier_block *nb,
         if (!domain)
                 return 0;
 
-        down_read(&dmar_global_lock);
         dmar_remove_one_dev_info(domain, dev);
         if (!domain_type_is_vm_or_si(domain) && list_empty(&domain->devices))
                 domain_exit(domain);
-        up_read(&dmar_global_lock);
 
         return 0;
 }