--- base-2394.c	2007-04-21 12:57:54.063576800 +0300
+++ base.c	2007-04-21 13:01:42.438576800 +0300
@@ -2300,13 +2300,19 @@
 			/* Get high channel in low bits */
 			rxs = (a & 0xf);
 			if (!(ts->span.chans[i+16].sig & ZT_SIG_CLEAR)) {
-				if (ts->span.chans[i+16].rxsig != rxs)
+				if (ts->span.chans[i+16].rxsig != rxs) {
+					spin_unlock(&wc->reglock);
 					zt_rbsbits(&ts->span.chans[i+16], rxs);
+					spin_lock(&wc->reglock);
+				}					
 			}
 			rxs = (a >> 4) & 0xf;
 			if (!(ts->span.chans[i].sig & ZT_SIG_CLEAR)) {
-				if (ts->span.chans[i].rxsig != rxs)
+				if (ts->span.chans[i].rxsig != rxs) {
+					spin_unlock(&wc->reglock);
 					zt_rbsbits(&ts->span.chans[i], rxs);
+					spin_lock(&wc->reglock);					
+				}
 			}
 		}
 	} else if (ts->span.lineconfig & ZT_CONFIG_D4) {
@@ -2315,23 +2321,35 @@
 			/* Get high channel in low bits */
 			rxs = (a & 0x3) << 2;
 			if (!(ts->span.chans[i+3].sig & ZT_SIG_CLEAR)) {
-				if (ts->span.chans[i+3].rxsig != rxs)
+				if (ts->span.chans[i+3].rxsig != rxs) {
+					spin_unlock(&wc->reglock);
 					zt_rbsbits(&ts->span.chans[i+3], rxs);
+					spin_lock(&wc->reglock);					
+				}
 			}
 			rxs = (a & 0xc);
 			if (!(ts->span.chans[i+2].sig & ZT_SIG_CLEAR)) {
-				if (ts->span.chans[i+2].rxsig != rxs)
+				if (ts->span.chans[i+2].rxsig != rxs) {
+					spin_unlock(&wc->reglock);
 					zt_rbsbits(&ts->span.chans[i+2], rxs);
+					spin_lock(&wc->reglock);
+				}
 			}
 			rxs = (a >> 2) & 0xc;
 			if (!(ts->span.chans[i+1].sig & ZT_SIG_CLEAR)) {
-				if (ts->span.chans[i+1].rxsig != rxs)
+				if (ts->span.chans[i+1].rxsig != rxs) {
+					spin_unlock(&wc->reglock);                                                              
 					zt_rbsbits(&ts->span.chans[i+1], rxs);
+					spin_lock(&wc->reglock);
+				}					
 			}
 			rxs = (a >> 4) & 0xc;
 			if (!(ts->span.chans[i].sig & ZT_SIG_CLEAR)) {
-				if (ts->span.chans[i].rxsig != rxs)
+				if (ts->span.chans[i].rxsig != rxs) {
+					spin_unlock(&wc->reglock);  
 					zt_rbsbits(&ts->span.chans[i], rxs);
+					spin_lock(&wc->reglock);
+				}
 			}
 		}
 	} else {
@@ -2342,14 +2360,18 @@
 			if (!(ts->span.chans[i+1].sig & ZT_SIG_CLEAR)) {
 				/* XXX Not really reset on every trans! XXX */
 				if (ts->span.chans[i+1].rxsig != rxs) {
+					spin_unlock(&wc->reglock);  
 					zt_rbsbits(&ts->span.chans[i+1], rxs);
+					spin_lock(&wc->reglock);
 				}
 			}
 			rxs = (a >> 4) & 0xf;
 			if (!(ts->span.chans[i].sig & ZT_SIG_CLEAR)) {
 				/* XXX Not really reset on every trans! XXX */
 				if (ts->span.chans[i].rxsig != rxs) {
+					spin_unlock(&wc->reglock);  
 					zt_rbsbits(&ts->span.chans[i], rxs);
+					spin_lock(&wc->reglock);
 				}
 			}
 		}
@@ -2475,7 +2497,9 @@
 	if (ts->span.mainttimer || ts->span.maintstat) 
 		alarms |= ZT_ALARM_LOOPBACK;
 	ts->span.alarms = alarms;
+	spin_unlock(&wc->reglock);
 	zt_alarm_notify(&ts->span);
+	spin_lock(&wc->reglock);
 }
 
 static void __t4_do_counters(struct t4 *wc)
@@ -2495,7 +2519,9 @@
 		if (docheck) {
 			if (!polling)
 				__t4_check_alarms(wc, span);
+			spin_unlock(&wc->reglock);
 			zt_alarm_notify(&ts->span);
+			spin_lock(&wc->reglock);
 		}
 	}
 }