vfio: Move the sanity check of the group to vfio_create_group()

This avoids opening group specific code in __vfio_register_dev() for the
sanity check if an (existing) group is not corrupted by having two copies
of the same struct device in it. It also simplifies the error unwind for
this sanity check since the failure can be detected in the group
allocation.

This also prepares for moving the group specific code into separate
group.c.

Grabbed from:
https://lore.kernel.org/kvm/[email protected]/

Link: https://lore.kernel.org/r/[email protected]
Reviewed-by: Kevin Tian <[email protected]>
Reviewed-by: Jason Gunthorpe <[email protected]>
Tested-by: Lixiao Yang <[email protected]>
Tested-by: Yu He <[email protected]>
Signed-off-by: Jason Gunthorpe <[email protected]>
Signed-off-by: Alex Williamson <[email protected]>
Signed-off-by: Yi Liu <[email protected]>

0 files changed, 0 insertions, 0 deletions