From: Joerg Roedel <jroe...@suse.de>
Using the cached value is much more efficient than calling
into the IOMMU core code.
Signed-off-by: Joerg Roedel <jroe...@suse.de>
---
drivers/iommu/amd_iommu.c | 7 +------
1 file changed, 1 insertion(+), 6 deletions(-)
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index e5f8e7f..4b17148 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -2223,16 +2223,11 @@ static void queue_add(struct dma_ops_domain *dma_dom,
static struct protection_domain *get_domain(struct device *dev)
{
struct protection_domain *domain;
- struct iommu_domain *io_domain;
if (!check_device(dev))
return ERR_PTR(-EINVAL);
- io_domain = iommu_get_domain_for_dev(dev);
- if (!io_domain)
- return NULL;
-
- domain = to_pdomain(io_domain);
+ domain = get_dev_data(dev)->domain;
if (!dma_ops_domain(domain))
return ERR_PTR(-EBUSY);
--
1.9.1
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