tree 4cc0642f3b953433a5064d4992dbdad51a67c4ac
parent 743dec4c0c80383556efac60f03d307287ecf024
author Jacob Erlbeck <jerlbeck@sysmocom.de> 1420730605 +0100
committer Holger Hans Peter Freyther <holger@moiji-mobile.com> 1421766753 +0100

gprs: Block other GSUP procedures during PURGE_MS

GSM 09.02, 19.4.1.4 mandates that no other MAP procedures shall be
started until the PURGE_MS procedure has been completed.

This patch implements this by adding corresponding state and checks
to gprs_subscr_purge, gprs_subscr_location_update, and
gprs_subscr_update_auth_info. If an Update Location or a Send Auth
Info Req procedure is not started because of blocking, the retry
mechanism is aborted to shorten the blocking time. The outstanding
Purge MS procedure itself is not aborted.

Sponsored-by: On-Waves ehf