hwsim tests: Check kernel messages for warnings/bugs

When a test passes but the kernel printed warnings, consider
the test to have failed.

Signed-hostap: Johannes Berg <johannes.berg@intel.com>

tests/hwsim/check_kernel.py

@@ -0,0 +1,22 @@
+# kernel message checker module
+#
+# Copyright (c) 2013, Intel Corporation
+#
+# Author: Johannes Berg <johannes@sipsolutions.net>
+#
+# This software may be distributed under the terms of the BSD license.
+# See README for more details.
+#
+"""
+Tests for kernel messages to find if there were any issues in them.
+"""
+
+import re
+
+issue = re.compile('(\[[0-9 .]*\] )?(WARNING:|BUG:).*')
+
+def check_kernel(logfile):
+    for line in open(logfile, 'r'):
+        if issue.match(line):
+            return False
+    return True