sgsn_rim: cosmetic: improve comment

Let's describe more clear what we do in sgsn_bssgp_fwd_rim_to_geran

Related: OS#6095
Change-Id: I54aa82845515bcaa6badc9e0e87fa6248333430e
---
M src/sgsn/sgsn_rim.c
1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/src/sgsn/sgsn_rim.c b/src/sgsn/sgsn_rim.c
index 07eff6b..4ba672e 100644
--- a/src/sgsn/sgsn_rim.c
+++ b/src/sgsn/sgsn_rim.c
@@ -21,6 +21,7 @@
 	struct bssgp_bvc_ctx *bvc_ctx;
 	OSMO_ASSERT(pdu->routing_info_dest.discr == BSSGP_RIM_ROUTING_INFO_GERAN);
 
+	/* Resolve RIM ROUTING ADDRESS to a BVC context */
 	bvc_ctx = btsctx_by_raid_cid(&pdu->routing_info_dest.geran.raid, pdu->routing_info_dest.geran.cid);
 	if (!bvc_ctx) {
 		LOGP(DRIM, LOGL_ERROR, "Unable to find NSEI for destination cell %s\n",
@@ -28,7 +29,7 @@
 		return -EINVAL;
 	}
 
-	/* Forward PDU as it is to the correct interface */
+	/* Forward PDU to the NSEI of the resolved BVC context */
 	return bssgp_tx_rim(pdu, bvc_ctx->nsei);
 }
 

