Michael Braun a0ad9e8c9e Remove WPA per-VLAN groups when no more stations remain
Previously, struct wpa_group was created when the first station enters
the group and the struct wpa_group was not freed when all station left
the group. This causes a problem because wpa_group will enter
FATAL_FAILURE when a wpa_group is running while the AP_VLAN interface
has already been removed.

Fix this by adding a reference counter to struct wpa_group and free a
group if it is unused.

Signed-off-by: Michael Braun <michael-dev@fami-braun.de>
2015-04-26 16:56:22 +03:00
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