mISDN: Add some debug option for clock problems

Add a new debug bit for clock problems.

Signed-off-by: Andreas Eversberg <andreas@eversberg.eu>
Signed-off-by: Karsten Keil <kkeil@suse.de>

2 files changed, 10 insertions, 7 deletions

diff --git a/drivers/isdn/mISDN/dsp.h b/drivers/isdn/mISDN/dsp.h
index ded948069335..98a33c58f091 100644
--- a/drivers/isdn/mISDN/dsp.h
+++ b/drivers/isdn/mISDN/dsp.h
@@ -15,6 +15,7 @@
 #define DEBUG_DSP_TONE          0x0020
 #define DEBUG_DSP_BLOWFISH      0x0040
 #define DEBUG_DSP_DELAY         0x0100
+#define DEBUG_DSP_CLOCK         0x0200
 #define DEBUG_DSP_DTMFCOEFF     0x8000 /* heavy output */
 
 /* options may be:
diff --git a/drivers/isdn/mISDN/dsp_cmx.c b/drivers/isdn/mISDN/dsp_cmx.c
index fc8ea41ae6a2..93fb819c5203 100644
--- a/drivers/isdn/mISDN/dsp_cmx.c
+++ b/drivers/isdn/mISDN/dsp_cmx.c
@@ -1192,7 +1192,7 @@ dsp_cmx_receive(struct dsp *dsp, struct sk_buff *skb)
          * we set our new read pointer, and write silence to buffer
          */
         if (((dsp->rx_W-dsp->rx_R) & CMX_BUFF_MASK) >= CMX_BUFF_HALF) {
-                if (dsp_debug & DEBUG_DSP_CMX)
+                if (dsp_debug & DEBUG_DSP_CLOCK)
                         printk(KERN_DEBUG
                             "cmx_receive(dsp=%lx): UNDERRUN (or overrun the "
                             "maximum delay), adjusting read pointer! "
@@ -1218,7 +1218,7 @@ dsp_cmx_receive(struct dsp *dsp, struct sk_buff *skb)
         if (dsp->cmx_delay)
                 if (((dsp->rx_W - dsp->rx_R) & CMX_BUFF_MASK) >=
                     (dsp->cmx_delay << 1)) {
-                        if (dsp_debug & DEBUG_DSP_CMX)
+                        if (dsp_debug & DEBUG_DSP_CLOCK)
                                 printk(KERN_DEBUG
                                     "cmx_receive(dsp=%lx): OVERRUN (because "
                                     "twice the delay is reached), adjusting "
@@ -1374,8 +1374,9 @@ dsp_cmx_send_member(struct dsp *dsp, int len, s32 *c, int members)
                                 r = (r+1) & CMX_BUFF_MASK;
                         }
                         if (r != rr) {
-                                printk(KERN_DEBUG "%s: buffer empty\n",
-                                        __func__);
+                                if (dsp_debug & DEBUG_DSP_CLOCK)
+                                        printk(KERN_DEBUG "%s: RX empty\n",
+                                                __func__);
                                 memset(d, dsp_silence, (rr-r)&CMX_BUFF_MASK);
                         }
                 /* -> if echo is enabled */
@@ -1724,7 +1725,7 @@ dsp_cmx_send(void *arg)
                          * the delay is greater dsp_poll
                          */
                         if (delay > dsp_poll && !dsp->cmx_delay) {
-                                if (dsp_debug & DEBUG_DSP_CMX)
+                                if (dsp_debug & DEBUG_DSP_CLOCK)
                                         printk(KERN_DEBUG
                                             "%s lowest rx_delay of %d bytes for"
                                             " dsp %s are now removed.\n",
@@ -1755,7 +1756,7 @@ dsp_cmx_send(void *arg)
                          * have enabled tx_dejitter
                          */
                         if (delay > dsp_poll && dsp->tx_dejitter) {
-                                if (dsp_debug & DEBUG_DSP_CMX)
+                                if (dsp_debug & DEBUG_DSP_CLOCK)
                                         printk(KERN_DEBUG
                                             "%s lowest tx_delay of %d bytes for"
                                             " dsp %s are now removed.\n",
@@ -1821,7 +1822,8 @@ dsp_cmx_transmit(struct dsp *dsp, struct sk_buff *skb)
         if (space < skb->len) {
                 /* write to the space we have left */
                 ww = (ww - 1) & CMX_BUFF_MASK; /* end one byte prior tx_R */
-                printk(KERN_DEBUG "%s: buffer overflow\n", __func__);
+                if (dsp_debug & DEBUG_DSP_CLOCK)
+                        printk(KERN_DEBUG "%s: TX overflow\n", __func__);
         } else
                 /* write until all byte are copied */
                 ww = (w + skb->len) & CMX_BUFF_MASK;