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>

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 0f258f0f5ac02f136017d4b484e8b3c084627793..d55ef9df0879e6c19f7da5bc0425beaaf5393b4d 100644 (file)
--- 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;
 }