Fix Radio Priority in MM Attach and PDP Context Activation
3GPP TS 24.008 Section 10.5.7.2 Radio Priority states that the Radio Priority IE is
3 bits as follows:
--------------------------------------------
0 0 1 priority level 1 (highest)
0 1 0 priority level 2
0 1 1 priority level 3
1 0 0 priority level 4 (lowest)
All other values are interpreted as priority
level 4 by this version of the protocol.
--------------------------------------------
However at least the MediaTek MT6753 and MT6592 have been
observed to interpret a value of 0 0 0 in an undetermined way
resulting in lack of access to RACH in the cell.
Fixes: OS#4506
Change-Id: I810cd541eb5764ee3f2c238bcd3a10836228d0b5
diff --git a/src/sgsn/gprs_gmm.c b/src/sgsn/gprs_gmm.c
index 86545f8..bf72cd6 100644
--- a/src/sgsn/gprs_gmm.c
+++ b/src/sgsn/gprs_gmm.c
@@ -302,7 +302,7 @@
aa->att_result = 1; /* GPRS only */
t = osmo_tdef_get(sgsn->cfg.T_defs, 3312, OSMO_TDEF_S, -1);
aa->ra_upd_timer = gprs_secs_to_tmr_floor(t);
- aa->radio_prio = 4; /* lowest */
+ aa->radio_prio = 0x44; /* lowest */
gsm48_encode_ra(&aa->ra_id, &mm->ra);
#if 0
diff --git a/src/sgsn/sgsn_libgtp.c b/src/sgsn/sgsn_libgtp.c
index 581e74d..45a4a07 100644
--- a/src/sgsn/sgsn_libgtp.c
+++ b/src/sgsn/sgsn_libgtp.c
@@ -167,6 +167,7 @@
pdp->hisaddr0 = ggsn->remote_addr;
pdp->hisaddr1 = ggsn->remote_addr;
//pdp->cch_pdp = 512; /* Charging Flat Rate */
+ pdp->radio_pri = 0x4;
/* MS provided APN, subscription was verified by the caller */
pdp->selmode = 0xFC | 0x00;