From 063071dff53858027e95d3cfcedb1780952302ad Mon Sep 17 00:00:00 2001
From: Joerg Roedel <jroedel@suse.de>
Date: Thu, 28 May 2015 18:41:38 +0200
Subject: [PATCH] iommu/amd: Use default domain if available for DMA-API
Signed-off-by: Joerg Roedel <jroedel@suse.de>
---
drivers/iommu/amd_iommu.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 22d38e3cdc7a2..ae7d636d3099b 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -2495,12 +2495,19 @@ void amd_iommu_init_notifier(void)
static struct protection_domain *get_domain(struct device *dev)
{
struct protection_domain *domain;
+ struct iommu_domain *io_domain;
struct dma_ops_domain *dma_dom;
u16 devid = get_device_id(dev);
if (!check_device(dev))
return ERR_PTR(-EINVAL);
+ io_domain = iommu_get_domain_for_dev(dev);
+ if (io_domain) {
+ domain = to_pdomain(io_domain);
+ return domain;
+ }
+
domain = domain_for_device(dev);
if (domain != NULL && !dma_ops_domain(domain))
return ERR_PTR(-EBUSY);