iommu: Remove the assignment of group->domain during default domain alloc
group->domain should only be set once all the device's drivers have
had their ops->attach_dev() called. iommu_group_alloc_default_domain()
doesn't do this, so it shouldn't set the value.
The previous patches organized things so that each caller of
iommu_group_alloc_default_domain() follows up with calling
__iommu_group_set_domain_internal() that does set the group->domain.
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/11-v5-1b99ae392328+44574-iommu_err_unwind_jgg@nvidia.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>