From c2fb3d0c3d0e8b12db01db70ca718914a6caad92 Mon Sep 17 00:00:00 2001
From: Harald Welte <laforge@gnumonks.org>
Date: Mon, 14 Jun 2010 22:47:37 +0200
Subject: [PATCH] [BSC] Make sure we only enable hopping on BTS that support it

---
 openbsc/src/bsc_vty.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/openbsc/src/bsc_vty.c b/openbsc/src/bsc_vty.c
index 46a13d36a..68a059749 100644
--- a/openbsc/src/bsc_vty.c
+++ b/openbsc/src/bsc_vty.c
@@ -2015,8 +2015,15 @@ DEFUN(cfg_ts_hopping,
       "Disable frequency hopping\n" "Enable frequency hopping\n")
 {
 	struct gsm_bts_trx_ts *ts = vty->index;
+	int enabled = atoi(argv[0]);
 
-	ts->hopping.enabled = atoi(argv[0]);
+	if (enabled && !gsm_bts_has_feature(ts->trx->bts, BTS_FEAT_HOPPING)) {
+		vty_out(vty, "BTS model does not support hopping%s",
+			VTY_NEWLINE);
+		return CMD_WARNING;
+	}
+
+	ts->hopping.enabled = enabled;
 
 	return CMD_SUCCESS;
 }