laforge has posted comments on this change. ( 
https://gerrit.osmocom.org/c/osmo-bsc/+/19792 )

Change subject: lchan_fsm: make rsl mode-modify working again
......................................................................


Patch Set 2:

(1 comment)

https://gerrit.osmocom.org/c/osmo-bsc/+/19792/1/src/osmo-bsc/lchan_fsm.c
File src/osmo-bsc/lchan_fsm.c:

https://gerrit.osmocom.org/c/osmo-bsc/+/19792/1/src/osmo-bsc/lchan_fsm.c@923
PS1, Line 923:                  lchan_rtp_fsm_start(lchan);
> I thought of this yes, but I think this is not a real life scenario. […]
I would suppose there are such situations, let's say you start a USSD command 
just after ending a call, i.e. after the CC transaction is cleared, but before 
the actual readio channel is gone.  The same probably would go for MT-USSD 
sessions that are started during a voice call but continue after the call is 
over.

Not the most common scenario, but definitely plausible.

Also, in terms of RTP: What if another voice call is just coming in before the 
old lchan is released?



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Gerrit-Project: osmo-bsc
Gerrit-Branch: master
Gerrit-Change-Id: I2c5a283b1ee33745cc1fcfcc09a0f9382224e2eb
Gerrit-Change-Number: 19792
Gerrit-PatchSet: 2
Gerrit-Owner: dexter <pma...@sysmocom.de>
Gerrit-Reviewer: Jenkins Builder
Gerrit-Reviewer: dexter <pma...@sysmocom.de>
Gerrit-Reviewer: laforge <lafo...@osmocom.org>
Gerrit-Reviewer: neels <nhofm...@sysmocom.de>
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