mISDN: Fix DTMF locking bug issue

DTMF digits were sent up to socket in locked state.
Receive audio stream was not enabled in certain condition.
Signed-off-by: Andreas Eversberg <andreas@eversberg.eu>
Signed-off-by: Karsten Keil <keil@b1-systems.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/isdn/hardware/mISDN/hfcmulti.c

@@ -1817,8 +1817,8 @@ hfcmulti_dtmf(struct hfc_multi *hc)
 			coeff[(co<<1)|1] = mantissa;
 		}
 		if (debug & DEBUG_HFCMULTI_DTMF)
-			printk("%s: DTMF ready %08x %08x %08x %08x "
-			    "%08x %08x %08x %08x\n", __func__,
+			printk(" DTMF ready %08x %08x %08x %08x "
+			    "%08x %08x %08x %08x\n",
 			    coeff[0], coeff[1], coeff[2], coeff[3],
 			    coeff[4], coeff[5], coeff[6], coeff[7]);
 		hc->chan[ch].coeff_count++;

drivers/isdn/mISDN/dsp.h

@@ -124,7 +124,7 @@ struct dsp_dtmf {
 		/* buffers one full dtmf frame */
 	u8		lastwhat, lastdigit;
 	int		count;
-	u8		digits[16]; /* just the dtmf result */
+	u8		digits[16]; /* dtmf result */
 };
 
 

drivers/isdn/mISDN/dsp_core.c

@@ -311,6 +311,7 @@ dsp_control_req(struct dsp *dsp, struct mISDNhead *hh, struct sk_buff *skb)
 
 		/* check dtmf hardware */
 		dsp_dtmf_hardware(dsp);
+		dsp_rx_off(dsp);
 		break;
 	case DTMF_TONE_STOP: /* turn off DTMF */
 		if (dsp_debug & DEBUG_DSP_CORE)
@@ -660,8 +661,7 @@ dsp_function(struct mISDNchannel *ch,  struct sk_buff *skb)
 	struct dsp		*dsp = container_of(ch, struct dsp, ch);
 	struct mISDNhead	*hh;
 	int			ret = 0;
-	u8			*digits;
-	int			cont;
+	u8			*digits = NULL;
 	u_long			flags;
 
 	hh = mISDN_HEAD_P(skb);
@@ -716,20 +716,31 @@ dsp_function(struct mISDNchannel *ch,  struct sk_buff *skb)
 		/* change volume if requested */
 		if (dsp->rx_volume)
 			dsp_change_volume(skb, dsp->rx_volume);
-
 		/* check if dtmf soft decoding is turned on */
 		if (dsp->dtmf.software) {
 			digits = dsp_dtmf_goertzel_decode(dsp, skb->data,
 				skb->len, (dsp_options&DSP_OPT_ULAW)?1:0);
+		}
+		/* we need to process receive data if software */
+		if (dsp->pcm_slot_tx < 0 && dsp->pcm_slot_rx < 0) {
+			/* process data from card at cmx */
+			dsp_cmx_receive(dsp, skb);
+		}
+
+		spin_unlock_irqrestore(&dsp_lock, flags);
+
+		/* send dtmf result, if any */
+		if (digits) {
 			while (*digits) {
+				int k;
 				struct sk_buff *nskb;
 				if (dsp_debug & DEBUG_DSP_DTMF)
 					printk(KERN_DEBUG "%s: digit"
 					    "(%c) to layer %s\n",
 					    __func__, *digits, dsp->name);
-				cont = DTMF_TONE_VAL | *digits;
+				k = *digits | DTMF_TONE_VAL;
 				nskb = _alloc_mISDN_skb(PH_CONTROL_IND,
-				    MISDN_ID_ANY, sizeof(int), &cont,
+					MISDN_ID_ANY, sizeof(int), &k,
 					GFP_ATOMIC);
 				if (nskb) {
 					if (dsp->up) {
@@ -742,14 +753,6 @@ dsp_function(struct mISDNchannel *ch,  struct sk_buff *skb)
 				digits++;
 			}
 		}
-		/* we need to process receive data if software */
-		if (dsp->pcm_slot_tx < 0 && dsp->pcm_slot_rx < 0) {
-			/* process data from card at cmx */
-			dsp_cmx_receive(dsp, skb);
-		}
-
-		spin_unlock_irqrestore(&dsp_lock, flags);
-
 		if (dsp->rx_disabled) {
 			/* if receive is not allowed */
 			break;