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[ Upstream commit 63a3345c ]

The allocated ports structure in never freed. The free function should be
called by release_cma_ports_group, but the group is never released since
we don't remove its default group.

Remove default groups when device group is deleted.

Fixes: 045959db ("IB/cma: Add configfs for rdma_cm")
Link: https://lore.kernel.org/r/20200521072650.567908-1-leon@kernel.org

Signed-off-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>