osmo_bsc_main.c: fix CCCH_CONF computation: use pchan_from_config

As can be seen from include/osmocom/bsc/gsm_data.h:

  - pchan_from_config - channel configuration from the VTY/config
    (can be changed from the VTY at runtime, should not affect
    the existing RSL/OML connections);
  - pchan_on_init - channel configuration after the OML link is
    established (pchan_from_config is copied here);
  - pchan_is - the *actual* channel configuration currently active.

Since we call bootstrap_bts() during the initialization, even before
establishing any OML/RSL connections, neither pchan_on_init nor
pchan_is can be used. Let's use pchan_from_config instead.

This change fixes the problem discovered by @mqng2 and reported
together with https://gerrit.osmocom.org/c/osmo-bsc/+/15909:

  CCCH_CONF in System Information Type 3 does not reflect the
  actual channel configuration, and always indicates a single
  CCCH combined with SDCCH. This also misleads the lchan
  allocation algorithm during the MO connection establishment.

Change-Id: I8f9d7aa27f24b55732a4de933bc834ed930806fd

0 files changed, 0 insertions, 0 deletions