1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/isdn/mISDN/dsp_core.c b/drivers/isdn/mISDN/dsp_core.c
index c35750647c66..c12cd2f94254 100644
--- a/drivers/isdn/mISDN/dsp_core.c
+++ b/drivers/isdn/mISDN/dsp_core.c
@@ -306,6 +306,7 @@ dsp_control_req(struct dsp *dsp, struct mISDNhead *hh, struct sk_buff *skb)
                                         "to %d\n", *((int *)data));
                         dsp->dtmf.treshold = (*(int *)data) * 10000;
                 }
+                dsp->dtmf.enable = 1;
                 /* init goertzel */
                 dsp_dtmf_goertzel_init(dsp);
 
@@ -316,6 +317,7 @@ dsp_control_req(struct dsp *dsp, struct mISDNhead *hh, struct sk_buff *skb)
         case DTMF_TONE_STOP: /* turn off DTMF */
                 if (dsp_debug & DEBUG_DSP_CORE)
                         printk(KERN_DEBUG "%s: stop dtmf\n", __func__);
+                dsp->dtmf.enable = 0;
                 dsp->dtmf.hardware = 0;
                 dsp->dtmf.software = 0;
                 break;