linux-kernel - [PATCH v2] intel-iommu: Add device info into list before doing context mapping

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Date:	Thu, 22 Dec 2011 17:17:42 +0800
From:	"Hao, Xudong" <xudong.hao@...el.com>
To:	Chris Wright <chrisw@...s-sol.org>
CC:	"dwmw2@...radead.org" <dwmw2@...radead.org>,
	"iommu@...ts.linux-foundation.org" <iommu@...ts.linux-foundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Zhang, Xiantao" <xiantao.zhang@...el.com>,
	"kvm@...r.kernel.org" <kvm@...r.kernel.org>
Subject: [PATCH v2] intel-iommu: Add device info into list before doing
 context mapping

Add device info into list before do context mapping, because device info will be used by iommu_enable_dev_iotlb function, in this function, pci_enable_ats would not be called without this patch.

Signed-off-by: Xudong Hao <xudong.hao@...el.com>
Signed-off-by: Xiantao Zhang <xiantao.zhang@...el.com>
Acked-by: Chris Wright <chrisw@...s-sol.org>
---
 drivers/iommu/intel-iommu.c |   17 +++++++++++------
 1 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index bdc447f..ccf347f 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -2267,12 +2267,6 @@ static int domain_add_dev_info(struct dmar_domain *domain,
 	if (!info)
 		return -ENOMEM;
 
-	ret = domain_context_mapping(domain, pdev, translation);
-	if (ret) {
-		free_devinfo_mem(info);
-		return ret;
-	}
-
 	info->segment = pci_domain_nr(pdev->bus);
 	info->bus = pdev->bus->number;
 	info->devfn = pdev->devfn;
@@ -2285,6 +2279,17 @@ static int domain_add_dev_info(struct dmar_domain *domain,
 	pdev->dev.archdata.iommu = info;
 	spin_unlock_irqrestore(&device_domain_lock, flags);
 
+	ret = domain_context_mapping(domain, pdev, translation);
+	if (ret) {
+		spin_lock_irqsave(&device_domain_lock, flags);
+		list_del(&info->link);
+		list_del(&info->global);
+		pdev->dev.archdata.iommu = NULL;
+		spin_unlock_irqrestore(&device_domain_lock, flags);
+		free_devinfo_mem(info);
+		return ret;
+	}
+
 	return 0;
 }
 
--
1.6.0.rc1

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