From: Joerg Roedel <jroedel@suse.de>
Date: Tue, 20 Oct 2015 15:33:36 +0000 (+0200)
Subject: iommu/amd: Don't disable IRQs in __detach_device
X-Git-Tag: firefly_0821_release~176^2~781^2^7~9
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=f1dd0a8bcd67e34537fe02fa9cda15aa46368d11;p=firefly-linux-kernel-4.4.55.git

iommu/amd: Don't disable IRQs in __detach_device

This function is already called with IRQs disabled already.
So no need to disable them again.

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

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index e8443e6ff1b1..07f491c2dc64 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -2189,18 +2189,17 @@ static int attach_device(struct device *dev,
 static void __detach_device(struct iommu_dev_data *dev_data)
 {
 	struct protection_domain *domain;
-	unsigned long flags;
 
 	if (WARN_ON(!dev_data->domain))
 		return;
 
 	domain = dev_data->domain;
 
-	spin_lock_irqsave(&domain->lock, flags);
+	spin_lock(&domain->lock);
 
 	do_detach(dev_data);
 
-	spin_unlock_irqrestore(&domain->lock, flags);
+	spin_unlock(&domain->lock);
 }
 
 /*