iommu: Revive device_group iommu-ops call-back
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 <jroedel@suse.de>
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index f174506..a1e6e89 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -168,7 +168,7 @@
phys_addr_t (*iova_to_phys)(struct iommu_domain *domain, dma_addr_t iova);
int (*add_device)(struct device *dev);
void (*remove_device)(struct device *dev);
- int (*device_group)(struct device *dev, unsigned int *groupid);
+ struct iommu_group *(*device_group)(struct device *dev);
int (*domain_get_attr)(struct iommu_domain *domain,
enum iommu_attr attr, void *data);
int (*domain_set_attr)(struct iommu_domain *domain,