tree 8ed95295e4d35e5610e89a2453655c56d817fc54
parent d58c033305a644b5c44a836ce8bc7a552499014d
author Jacob Erlbeck <jerlbeck@sysmocom.de> 1451929416 +0100
committer Holger Hans Peter Freyther <holger@moiji-mobile.com> 1456134728 +0100

sgsn: Change handling of missing mmctx in gsm48_rx_gmm_ra_upd_req

Currently the MM context is just overwritten by a call to
sgsn_mm_ctx_by_tlli(msgb_tlli(msg), &old_ra_id) even if it
has already been found by using the BSSGP info. With the changes
made to sgsn_mm_ctx_by_tlli this will never find a MM context if
the routing area has changed. If the routing area has not changed,
the mmctx has already been found if it exists.

This commit splits searching for an MM context (if it hasn't been
found already) from checking, whether a found one can really be
used. The actual search is removed, so that the MS will be forced to
restart the attach procedure, which is less efficient but safe.

Sponsored-by: On-Waves ehf