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>

2 files changed, 21 insertions, 18 deletions

diff --git a/drivers/isdn/mISDN/dsp.h b/drivers/isdn/mISDN/dsp.h
index 4a1c444d73ac..41c6cfdca8c8 100644
--- a/drivers/isdn/mISDN/dsp.h
+++ b/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 */
 };
 
 
diff --git a/drivers/isdn/mISDN/dsp_core.c b/drivers/isdn/mISDN/dsp_core.c
index 621ea9bc7c25..6b4939854306 100644
--- a/drivers/isdn/mISDN/dsp_core.c
+++ b/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)
@@ -657,11 +658,10 @@ get_features(struct mISDNchannel *ch)
 static int
 dsp_function(struct mISDNchannel *ch,  struct sk_buff *skb)
 {
-        struct dsp                      *dsp = container_of(ch, struct dsp, ch);
+        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);
@@ -716,40 +716,43 @@ 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,
-                                    GFP_ATOMIC);
+                                        MISDN_ID_ANY, sizeof(int), &k,
+                                        GFP_ATOMIC);
                                 if (nskb) {
                                         if (dsp->up) {
                                                 if (dsp->up->send(
                                                     dsp->up, nskb))
-                                                dev_kfree_skb(nskb);
+                                                        dev_kfree_skb(nskb);
                                         } else
                                                 dev_kfree_skb(nskb);
                                 }
                                 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;
@@ -789,7 +792,7 @@ dsp_function(struct mISDNchannel *ch,  struct sk_buff *skb)
                                         if (dsp->up) {
                                                 if (dsp->up->send(
                                                     dsp->up, nskb))
-                                                dev_kfree_skb(nskb);
+                                                        dev_kfree_skb(nskb);
                                         } else
                                                 dev_kfree_skb(nskb);
                                 }