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iommu: Add generic_device_group() function

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This function can be used as a device_group call-back and
just allocates one iommu-group per device.

Signed-off-by: Joerg Roedel <[email protected]>
This commit is contained in:
Joerg Roedel 2015-10-21 23:51:38 +02:00
commit 6eab556a40
2 changed files with 17 additions and 0 deletions
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15
drivers/iommu/iommu.c
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@ -727,6 +727,21 @@ static int get_pci_alias_or_group(struct pci_dev *pdev, u16 alias, void *opaque)
return data->group != NULL;
}
/*
* Generic device_group call-back function. It just allocates one
* iommu-group per device.
*/
struct iommu_group *generic_device_group(struct device *dev)
{
struct iommu_group *group;
group = iommu_group_alloc();
if (IS_ERR(group))
return NULL;
return group;
}
/*
* Use standard PCI bus topology, isolation features, and DMA alias quirks
* to find or create an IOMMU group for a device.