kmodloader takes longer than wdt timeout

on systms with slow flash the watchdog will trigger when a lot of modules are
included in the image.

Signed-off-by: John Crispin <blogic@openwrt.org>

3 files changed, 18 insertions, 4 deletions

diff --git a/initd/init.c b/initd/init.c
index d8490f8..0d201bc 100644
--- a/initd/init.c
+++ b/initd/init.c
@@ -99,10 +99,18 @@ main(int argc, char **argv)
 		ERROR("Failed to start kmodloader\n");
 		exit(-1);
 	}
-	if (pid <= 0)
+	if (pid <= 0) {
 		ERROR("Failed to start kmodloader instance\n");
-	else
-		waitpid(pid, NULL, 0);
+	} else {
+		int i;
+
+		for (i = 0; i < 120; i++) {
+			if (waitpid(pid, NULL, WNOHANG) > 0)
+				break;
+			sleep(1);
+			watchdog_ping();
+		}
+	}
 	uloop_init();
 	preinit();
 	uloop_run();
diff --git a/watchdog.c b/watchdog.c
index 399f6af..3c097e2 100644
--- a/watchdog.c
+++ b/watchdog.c
@@ -32,11 +32,16 @@ static struct uloop_timeout wdt_timeout;
 static int wdt_fd = -1;
 static int wdt_frequency = 5;
 
-static void watchdog_timeout_cb(struct uloop_timeout *t)
+void watchdog_ping(void)
 {
 	DEBUG(4, "Ping\n");
 	if (write(wdt_fd, "X", 1) < 0)
 		ERROR("WDT failed to write: %s\n", strerror(errno));
+}
+
+static void watchdog_timeout_cb(struct uloop_timeout *t)
+{
+	watchdog_ping();
 	uloop_timeout_set(t, wdt_frequency * 1000);
 }
 
diff --git a/watchdog.h b/watchdog.h
index a774dd7..015fa93 100644
--- a/watchdog.h
+++ b/watchdog.h
@@ -22,5 +22,6 @@ int watchdog_frequency(int frequency);
 void watchdog_set_stopped(bool val);
 bool watchdog_get_stopped(void);
 void watchdog_no_cloexec(void);
+void watchdog_ping(void);
 
 #endif