1 files changed, 13 insertions, 4 deletions
diff --git a/Documentation/watchdog/src/watchdog-simple.c b/Documentation/watchdog/src/watchdog-simple.c
index 85cf17c4866..ba45803a221 100644
--- a/Documentation/watchdog/src/watchdog-simple.c
+++ b/Documentation/watchdog/src/watchdog-simple.c
@@ -1,15 +1,24 @@
+#include <stdio.h>
 #include <stdlib.h>
+#include <unistd.h>
 #include <fcntl.h>
 
-int main(int argc, const char *argv[]) {
+int main(void)
+{
 	int fd = open("/dev/watchdog", O_WRONLY);
+	int ret = 0;
 	if (fd == -1) {
 		perror("watchdog");
-		exit(1);
+		exit(EXIT_FAILURE);
 	}
 	while (1) {
-		write(fd, "\0", 1);
-		fsync(fd);
+		ret = write(fd, "\0", 1);
+		if (ret != 1) {
+			ret = -1;
+			break;
+		}
 		sleep(10);
 	}
+	close(fd);
+	return ret;
 }