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iommu: Revive device_group iommu-ops call-back

Browse source 
That call-back is currently unused, change it into a
call-back function for finding the right IOMMU group for a
device.
This is a first step to remove the hard-coded PCI dependency
in the iommu-group code.

Signed-off-by: Joerg Roedel <[email protected]>
This commit is contained in:
Joerg Roedel 2015-10-21 23:51:36 +02:00
commit 46c6b2bc88
2 changed files with 7 additions and 4 deletions
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9
drivers/iommu/iommu.c
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@ -814,6 +814,7 @@ static struct iommu_group *iommu_group_get_for_pci_dev(struct pci_dev *pdev)
*/
struct iommu_group *iommu_group_get_for_dev(struct device *dev)
{
const struct iommu_ops *ops = dev->bus->iommu_ops;
struct iommu_group *group;
int ret;
@ -821,10 +822,12 @@ struct iommu_group *iommu_group_get_for_dev(struct device *dev)
if (group)
return group;
if (!dev_is_pci(dev))
return ERR_PTR(-EINVAL);
group = ERR_PTR(-EINVAL);
group = iommu_group_get_for_pci_dev(to_pci_dev(dev));
if (ops && ops->device_group)
group = ops->device_group(dev);
else if (dev_is_pci(dev))
group = iommu_group_get_for_pci_dev(to_pci_dev(dev));
if (IS_ERR(group))
return group;