qemurunner: Clean up serial_lock handling

Avoid "RuntimeError: release unlocked lock" since the lock shouldn't
be locked even in the error path. Add a try/finally path to ensure
this.

(From OE-Core rev: 78f86c946d37d15b044be158e22e9853009cae27)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit b0732ee009ca47580d1d2ad75334f4aa50e6efd5)
Signed-off-by: Steve Sakoman <steve@sakoman.com>

1 files changed, 6 insertions, 5 deletions

diff --git a/meta/lib/oeqa/utils/qemurunner.py b/meta/lib/oeqa/utils/qemurunner.py
index cda43aad8c..f1c2d2b5c9 100644
--- a/meta/lib/oeqa/utils/qemurunner.py
+++ b/meta/lib/oeqa/utils/qemurunner.py
@@ -519,7 +519,6 @@ class QemuRunner:
                 except Exception as e:
                     self.logger.warning('Extra log data exception %s' % repr(e))
                     data = None
-            self.thread.serial_lock.release()
             return False
 
         with self.thread.serial_lock:
@@ -822,10 +821,12 @@ class LoggingThread(threading.Thread):
                     self.logfunc(data, ".stdout")
                 elif self.serialsock and self.serialsock.fileno() == fd:
                     if self.serial_lock.acquire(blocking=False):
-                        data = self.recv(1024, self.serialsock)
-                        self.logger.debug("Data received serial thread %s" % data.decode('utf-8', 'replace'))
-                        self.logfunc(data, ".2")
-                        self.serial_lock.release()
+                        try:
+                            data = self.recv(1024, self.serialsock)
+                            self.logger.debug("Data received serial thread %s" % data.decode('utf-8', 'replace'))
+                            self.logfunc(data, ".2")
+                        finally:
+                            self.serial_lock.release()
                     else:
                         serial_registered = False
                         poll.unregister(self.serialsock.fileno())