[Asterisk-cvs] zaptel wct4xxp.c,1.22,1.23

[citats at lists.digium.com]

Update of /usr/cvsroot/zaptel
In directory mongoose.digium.com:/home/citats/cvs/zaptel

Modified Files:
	wct4xxp.c 
Log Message:
spin_lock in t4_set_timing_source in wct4xxp.c (fixes panic on SMP)


Index: wct4xxp.c
===================================================================
RCS file: /usr/cvsroot/zaptel/wct4xxp.c,v
retrieving revision 1.22
retrieving revision 1.23
diff -u -d -r1.22 -r1.23
--- wct4xxp.c	31 Mar 2004 19:42:17 -0000	1.22
+++ wct4xxp.c	1 Apr 2004 07:04:31 -0000	1.23
@@ -627,11 +627,15 @@
 		printk("Successfully initialized serial bus for unit %d\n", unit);
 }
 
+static spinlock_t synclock = SPIN_LOCK_UNLOCKED;
+
 static void t4_set_timing_source(struct t4 *wc, int unit)
 {
 	unsigned int timing;
+	unsigned long flags;
 	int x;
 	timing = 0x34;		/* CMR1: RCLK unit, 8.192 Mhz TCLK, RCLK is 8.192 Mhz */
+	spin_lock_irqsave(&synclock, flags);
 	if ((unit > -1) && (unit < 4)) {
 		timing |= (unit << 6);
 	} else {
@@ -654,6 +658,7 @@
 	wc->syncsrc = unit;
 	for (x=0;x<4;x++)
 		wc->spans[x].syncsrc = unit;
+	spin_unlock_irqrestore(&synclock, flags);
 }
 
 static void t4_set_timing_source_auto(struct t4 *wc)