From 9952a20fdaf2913d880d2a0e96064617ac9d9ebe Mon Sep 17 00:00:00 2001
From: Werner Almesberger <werner@almesberger.net>
Date: Mon, 20 Jun 2011 20:46:52 -0300
Subject: [PATCH] tools/lib/atben.c (atben_interrupt_wait): complain about
 stray interrupts

If INT_RF is high but IRQ_STATUS is clear, something strange is
happening. We complain but continue waiting.
---
 tools/lib/atben.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/tools/lib/atben.c b/tools/lib/atben.c
index ce7bd34..5a0cc11 100644
--- a/tools/lib/atben.c
+++ b/tools/lib/atben.c
@@ -388,12 +388,17 @@ int atben_interrupt_wait(void *handle, int timeout_ms)
 {
 	struct timeout to;
 	int timedout;
+	uint8_t irq;
 
 	timeout_start(&to, timeout_ms);
 	while (1) {
 		timedout = timeout_reached(&to);
-		if (atben_interrupt(handle))
-			return atben_reg_read(handle, REG_IRQ_STATUS);
+		if (atben_interrupt(handle)) {
+			irq = atben_reg_read(handle, REG_IRQ_STATUS);
+			if (irq)
+				return irq;
+			fprintf(stderr, "ignoring stray interrupt\n");
+		}
 		if (timedout)
 			return 0;
 		usleep(1000);