From: Joerg Roedel <jroedel@suse.de>
Date: Wed, 22 Jul 2015 15:29:47 +0000 (+0200)
Subject: iommu/vt-d: Remove dmar_global_lock from device_notifier
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=2309bd793ead6d5e4ace611502aa87b3202856ca;p=linux-beck.git

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 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;
 }