Index: include/linux/serial_core.h
===================================================================
--- include/linux/serial_core.h	(revision 119)
+++ include/linux/serial_core.h	(revision 120)
@@ -447,8 +447,8 @@
 uart_handle_sysrq_char(struct uart_port *port, unsigned int ch)
 {
 #ifdef SUPPORT_SYSRQ
-	if (port->sysrq) {
-		if (ch && time_before(jiffies, port->sysrq)) {
+	if (port->sysrq && time_after(jiffies, port->sysrq + (unsigned long)(HZ*0.01))) {
+		if (ch && time_before(jiffies, port->sysrq + HZ*5)) {
 			handle_sysrq(ch, port->info ? port->info->tty : NULL);
 			port->sysrq = 0;
 			return 1;
@@ -467,19 +467,17 @@
  */
 static inline int uart_handle_break(struct uart_port *port)
 {
+	int ret = 0;
 	struct uart_info *info = port->info;
 #ifdef SUPPORT_SYSRQ
 	if (port->cons && port->cons->index == port->line) {
-		if (!port->sysrq) {
-			port->sysrq = jiffies + HZ*5;
-			return 1;
-		}
-		port->sysrq = 0;
+		port->sysrq = jiffies;
+		ret = 1;
 	}
 #endif
 	if (port->flags & UPF_SAK)
 		do_SAK(info->tty);
-	return 0;
+	return ret;
 }
 
 /**