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>
mariux64 · Aug 12, 2015 · 2309bd7 · 2309bd7
1 parent 55d9404
commit 2309bd7
Showing 1 changed file with 0 additions and 2 deletions.
diff --git 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;
 }