freetdm: ftmod_wanpipe: Do not attempt to initialize hwdtmf in GSM ports during shutdown

diff --git a/libs/freetdm/src/ftmod/ftmod_wanpipe/ftmod_wanpipe.c b/libs/freetdm/src/ftmod/ftmod_wanpipe/ftmod_wanpipe.c
index ca60e303526d3e2effc2aed40981dae989b54940..3d2a23ceef6a7020270461a251bb4fbe98fd81cf 100755 (executable)
--- a/libs/freetdm/src/ftmod/ftmod_wanpipe/ftmod_wanpipe.c
+++ b/libs/freetdm/src/ftmod/ftmod_wanpipe/ftmod_wanpipe.c
@@ -1721,8 +1721,8 @@ static FIO_CHANNEL_DESTROY_FUNCTION(wanpipe_channel_destroy)
                /* enable HW DTMF. As odd as it seems. Why enable when the channel is being destroyed and won't be used anymore?
                 * because that way we can transfer the DTMF state back to the driver, if we're being restarted we will set again
                 * the FEATURE_DTMF flag and use HW DTMF, if we don't enable here, then on module restart we won't see
-                * HW DTMF available and will use software */
-               if (ftdm_channel_test_feature(ftdmchan, FTDM_CHANNEL_FEATURE_DTMF_DETECT)) {
+                * HW DTMF available and will use software (except for GSM cards which enable hw dtmf on the signaling module) */
+               if (ftdmchan->span->trunk_type != FTDM_TRUNK_GSM && ftdm_channel_test_feature(ftdmchan, FTDM_CHANNEL_FEATURE_DTMF_DETECT)) {
                        wanpipe_tdm_api_t tdm_api;
                        int err;
                        memset(&tdm_api, 0, sizeof(tdm_api));