direct-phy: fix handle_ph_ra_ind(): handle PH-RA.ind on PRACH SAPI
In [1] I restricted L1 SAPI of PH-RA.ind to PDTCH and PTCCH, and
this seems to have caused a regression reported in [2]:
DL1IF ERROR sysmo_l1_if.c:251 Rx PH-RA.ind for unknown L1 SAPI PRACH
I assumed that PH-RA.ind belonging to a Control Acknowledgement
message (in format of 4 Access Bursts) would have PDTCH SAPI,
while apparently it's actually arriving on PRACH.
[1] I482d60a46b9d253dfe0b16140eac9fea6420b30c
[2] https://osmocom.org/issues/1526#note-39
Change-Id: Ib0a6da37de7a1db4cad2b96293b31b9f32e7d9eb
Related: OS#1526
diff --git a/src/osmo-bts-litecell15/lc15_l1_if.c b/src/osmo-bts-litecell15/lc15_l1_if.c
index 0fcd7cf..bf2ecec 100644
--- a/src/osmo-bts-litecell15/lc15_l1_if.c
+++ b/src/osmo-bts-litecell15/lc15_l1_if.c
@@ -250,6 +250,7 @@
switch (ra_ind->sapi) {
case GsmL1_Sapi_Pdtch:
+ case GsmL1_Sapi_Prach:
bts_update_tbf_ta("PH-RA", ra_ind->u32Fn, fl1h->trx_no, ra_ind->u8Tn,
qta2ta(ra_ind->measParam.i16BurstTiming), true);
break;