umount with -f option

Change-Id: Ia1f17e5595ab0ad8a3b1ce7edf319b040cbdbb20
Signed-off-by: wangbiao <biao716.wang@samsung.com>

diff --git a/common_functions b/common_functions
index 4168b4402502dbee41f8f7a0c2492047dbd5854a..2d537b2a22656c2a3cf8dce725ff9d78bc76dbcb 100755 (executable)
--- a/common_functions
+++ b/common_functions
@@ -158,7 +158,7 @@ buildroot_umount() {
     # XXX: use stat -f /dev/pts/ -c %T  to check whether it's mounted and not suppress errors?
     local LOOP_CNT=1
     while [ $LOOP_CNT -le 20 ] ; do
-        umount -n "$BUILD_ROOT/$d" 2>/dev/null
+        umount -n -l -f "$BUILD_ROOT/$d" 2>/dev/null
         if test $? -ne 0; then
             break
         fi