From 6d986fe379b364be163baf9267abc8c2ea42aa54 Mon Sep 17 00:00:00 2001
From: Bertrand Aygon <bertrand.aygon@intel.com>
Date: Sun, 24 Jul 2011 05:32:42 +0200
Subject: [PATCH] cdmamodem: check for TUN/TAP devices in ConnMan atom.

---
 drivers/cdmamodem/connman.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/cdmamodem/connman.c b/drivers/cdmamodem/connman.c
index ce9a7483..0df93eb5 100644
--- a/drivers/cdmamodem/connman.c
+++ b/drivers/cdmamodem/connman.c
@@ -28,6 +28,7 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <errno.h>
+#include <sys/stat.h>
 
 #include <glib.h>
 
@@ -41,6 +42,8 @@
 
 #include "cdmamodem.h"
 
+#define TUN_SYSFS_DIR "/sys/devices/virtual/misc/tun"
+
 #define STATIC_IP_NETMASK "255.255.255.255"
 
 static const char *none_prefix[] = { NULL };
@@ -240,9 +243,15 @@ static int cdma_connman_probe(struct ofono_cdma_connman *cm,
 {
 	GAtChat *chat = data;
 	struct connman_data *cd;
+	struct stat st;
 
 	DBG("");
 
+	if (stat(TUN_SYSFS_DIR, &st) < 0) {
+		ofono_error("Missing support for TUN/TAP devices");
+		return -ENODEV;
+	}
+
 	cd = g_try_new0(struct connman_data, 1);
 	if (cd == NULL)
 		return -ENOMEM;