[dts] [PATCH V1] framework/crb:add check link status public method

[Zhimin Huang]

when we meet testpmd or app start but link is not up.
we can loop up the interface to ensure link.

Signed-off-by: Zhimin Huang <zhiminx.huang at intel.com>
---
 framework/crb.py | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/framework/crb.py b/framework/crb.py
index bd4f565d..22af9ad3 100755
--- a/framework/crb.py
+++ b/framework/crb.py
@@ -907,3 +907,17 @@ class Crb(object):
         else:
             self.logger.info("NIC %s may be not find %s" % (intf, flag))
             return False
+
+    def check_interfaces_link(self, intf, timeout=15):
+        """
+        loop to check port link status
+        """
+        for i in range(timeout):
+            out = self.send_expect("ethtool {} | tail -1 ".format(intf), "# ")
+            if 'Link detected: yes' not in out:
+                self.send_expect("ifconfig {} up".format(intf), "# ")
+                time.sleep(1)
+            else:
+                return True
+        self.logger.error("{} link is down".format(intf))
+        return False
-- 
2.17.1