[dts] [PATCH V1] framework/crb: optimization code

[lihong]

Signed-off-by: lihong <lihongx.ma at intel.com>
---
 framework/crb.py | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/framework/crb.py b/framework/crb.py
index 91f2946..c1f2a1c 100644
--- a/framework/crb.py
+++ b/framework/crb.py
@@ -517,8 +517,7 @@ class Crb(object):
                 self.prefix_list = []
             else:
                 self.logger.info('kill_all: called by dut and has no prefix list.')
-                session = self.create_session('dut_session')
-                out = session.send_command("ls -l /var/run/dpdk |awk '/^d/ {print $NF}'", timeout=0.5)
+                out = self.send_command("ls -l /var/run/dpdk |awk '/^d/ {print $NF}'", timeout=0.5, alt_session=True)
                 # the last directory is expect string, eg: [PEXPECT]#
                 if out != '':
                     dir_list = out.split('\r\n')
-- 
2.7.4