From 8b1b5632e4a4cc909cb0c0fb062082d10a536f9a Mon Sep 17 00:00:00 2001
From: "W. Trevor King" <wking@drexel.edu>
Date: Mon, 19 Mar 2012 12:10:18 -0400
Subject: [PATCH] Fix error condition `ret < 0` -> `ret < len(insnlist)` for
 Device.do_insnlist.

The previous implemenation would apparently succeed if there was an
error executing an instruction.  It would only raise an exception if a
failure occured before the first instruction could be executed.
---
 pycomedi/device.pyx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pycomedi/device.pyx b/pycomedi/device.pyx
index b5ef683..bdff315 100644
--- a/pycomedi/device.pyx
+++ b/pycomedi/device.pyx
@@ -243,7 +243,7 @@ cdef class Device (object):
             ret = _comedilib_h.comedi_do_insnlist(self.device, &il)
         finally:
             _stdlib.free(il.insns)
-        if ret < 0:
+        if ret < len(insnlist):
             _error.raise_error(function_name='comedi_do_insnlist', ret=ret)
         return ret
 
-- 
2.26.2