Robin Murphy 3a8d40b6ce
iommu/mediatek: Fix M4Uv2 group refcounting ...
For each subsequent device assigned to the m4u_group after its initial
allocation, we need to take an additional reference. Otherwise, the
caller of iommu_group_get_for_dev() will inadvertently remove the
reference taken by iommu_group_add_device(), and the group will be
freed prematurely if any device is removed.
Signed-off-by: Robin Murphy <robin.murphy@arm.com >
Signed-off-by: Joerg Roedel <jroedel@suse.de >
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3a8d40b6ce