--- zzzz-none-000/linux-2.6.19.2/drivers/isdn/hysdn/hysdn_sched.c	2007-01-10 19:10:37.000000000 +0000
+++ davinci-8020-5505/linux-2.6.19.2/drivers/isdn/hysdn/hysdn_sched.c	2007-01-11 07:38:19.000000000 +0000
@@ -155,17 +155,21 @@
 	if (card->debug_flags & LOG_SCHED_ASYN)
 		hysdn_addlog(card, "async tx-cfg chan=%d len=%d", chan, strlen(line) + 1);
 
+	spin_lock_irqsave(&card->hysdn_lock, flags);
 	while (card->async_busy) {
+		sti();
 
 		if (card->debug_flags & LOG_SCHED_ASYN)
 			hysdn_addlog(card, "async tx-cfg delayed");
 
 		msleep_interruptible(20);		/* Timeout 20ms */
-		if (!--cnt)
+		if (!--cnt) {
+			spin_unlock_irqrestore(&card->hysdn_lock, flags);
 			return (-ERR_ASYNC_TIME);	/* timed out */
+		}
+		cli();
 	}			/* wait for buffer to become free */
 
-	spin_lock_irqsave(&card->hysdn_lock, flags);
 	strcpy(card->async_data, line);
 	card->async_len = strlen(line) + 1;
 	card->async_channel = chan;
@@ -173,23 +177,30 @@
 
 	/* now queue the task */
 	schedule_work(&card->irq_queue);
-	spin_unlock_irqrestore(&card->hysdn_lock, flags);
+	sti();
 
 	if (card->debug_flags & LOG_SCHED_ASYN)
 		hysdn_addlog(card, "async tx-cfg data queued");
 
 	cnt++;			/* short delay */
+	cli();
 
 	while (card->async_busy) {
+		sti();
 
 		if (card->debug_flags & LOG_SCHED_ASYN)
 			hysdn_addlog(card, "async tx-cfg waiting for tx-ready");
 
 		msleep_interruptible(20);		/* Timeout 20ms */
-		if (!--cnt)
+		if (!--cnt) {
+			spin_unlock_irqrestore(&card->hysdn_lock, flags);
 			return (-ERR_ASYNC_TIME);	/* timed out */
+		}
+		cli();
 	}			/* wait for buffer to become free again */
 
+	spin_unlock_irqrestore(&card->hysdn_lock, flags);
+
 	if (card->debug_flags & LOG_SCHED_ASYN)
 		hysdn_addlog(card, "async tx-cfg data send");