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Instead of returning the struct group_device and then later freeing it, do
the entire free under the group->mutex and defer only putting the
iommu_group.
It is safe to remove the sysfs_links and free memory while holding that
mutex.
Move the sanity assert of the group status into
__iommu_group_free_device().
The next patch will improve upon this and consolidate the group put and
the mutex into __iommu_group_remove_device().
__iommu_group_free_device() is close to being the paired undo of
iommu_group_add_device(), following patches will improve on that.
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/4-v3-328044aa278c+45e49-iommu_probe_jgg@nvidia.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
df15d76dca