linux-kernel - [PATCH 03/12] iommu/amd: Don't disable IRQs in __detach

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Date:	Tue, 20 Oct 2015 17:33:36 +0200
From:	Joerg Roedel <joro@...tes.org>
To:	iommu@...ts.linux-foundation.org
Cc:	linux-kernel@...r.kernel.org, Joerg Roedel <jroedel@...e.de>
Subject: [PATCH 03/12] iommu/amd: Don't disable IRQs in __detach_device

From: Joerg Roedel <jroedel@...e.de>

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

Signed-off-by: Joerg Roedel <jroedel@...e.de>
---
 drivers/iommu/amd_iommu.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index b86c5f0..54e0862 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -2198,18 +2198,17 @@ 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);
 }
 
 /*
-- 
1.9.1

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