FS-4867: --resolve Prevent possible deadlock due to mutexes locked in opposite order...

diff --git a/src/switch_core_io.c b/src/switch_core_io.c
index 72345d6a040756352ff8d4e463e07be7516aec7c..c104ea9c6a50f75f24c74e406fd289b4f1bfee84 100644 (file)
--- a/src/switch_core_io.c
+++ b/src/switch_core_io.c
@@ -151,7 +151,9 @@ SWITCH_DECLARE(switch_status_t) switch_core_session_read_frame(switch_core_sessi
        
        for(i = 0; i < 2; i++) {
                if (session->dmachine[i] && !switch_channel_test_flag(session->channel, CF_BROADCAST)) {
+                       switch_mutex_lock(session->channel->dtmf_mutex);
                        switch_ivr_dmachine_ping(session->dmachine[i], NULL);
+                       switch_mutex_unlock(session->channel->dtmf_mutex);
                }
        }