Fix problem with dev.is_kernel_driver_active(0)

2016-09-20 09:40:23 +02:00
parent 2a0bc50113
commit 4eb4a3657d
1 changed files with 3 additions and 2 deletions
--- a/brother_ql/backends/pyusb.py
+++ b/brother_ql/backends/pyusb.py
@@ -86,10 +86,11 @@ class BrotherQLBackendPyUSB(BrotherQLBackendGeneric):

        # Now we are sure to have self.dev around, start using it:

-        if self.dev.is_kernel_driver_active(0):
+        try:
+            assert self.dev.is_kernel_driver_active(0)
            self.dev.detach_kernel_driver(0)
            self.was_kernel_driver_active = True
-        else:
+        except (NotImplementedError, AssertionError):
            self.was_kernel_driver_active = False

        # set the active configuration. With no arguments, the first configuration will be the active one