* TL;DR: didn't RTFM

Author: smurfix

debian/changelog

@@ -1,3 +1,9 @@
+trio-gpio (0.2.3-2) unstable; urgency=medium
+
+  * TL;DR: didn't RTFM
+
+ -- Matthias Urlichs <matthias@urlichs.de>  Mon, 11 Jun 2018 09:08:30 +0200
+
 trio-gpio (0.2.2-1) unstable; urgency=medium
 
   * Access errno

trio_gpio/gpio.py

@@ -135,12 +135,10 @@ def _enter_io(self):
             )
         else:
             self.__exit__()
-            raise RuntimeError("Unknown direction", r)
+            raise RuntimeError("Unknown direction")
         if r != 0:
-            if r < 0:
-                r = gpio.ffi.errno
             self.__exit__()
-            raise OSError("unable to set direction", r)
+            raise OSError("unable to set direction")
         self._state = _IN_IO
         return self
 
@@ -151,7 +149,7 @@ def _enter_ev(self):
         req.flags = self._flags
 
         if gpio.lib.gpiod_line_request(self._line, req, 0) != 0:
-            raise OSError("unable to request event monitoring", gpio.ffi.errno)
+            raise OSError("unable to request event monitoring")
         self._state = _IN_EV
 
     def __exit__(self, *tb):
@@ -279,9 +277,7 @@ async def __anext__(self):
         self._is_open()
         r = gpio.lib.gpiod_line_event_read_fd(fd, ev)
         if r != 0:
-            if r < 0:
-                r = gpio.ffi.errno
-            raise OSError("unable to read update", r)
+            raise OSError("unable to read update")
         return Event(ev)
 
     async def aclose(self):