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iommu/amd: Use default domain if available for DMA-API 

Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Joerg Roedel 2015-05-28 18:41:38 +02:00
parent 35cf248f88
commit 063071dff5
1 changed files with 7 additions and 0 deletions
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7
drivers/iommu/amd_iommu.c
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@ -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);