pyocf: fix error handling in Cache::stop()

Write error in cache stop means the instance was in fact stopped.

Signed-off-by: Adam Rutkowski <adam.j.rutkowski@intel.com>

tests/functional/pyocf/types/cache.py

@@ -700,7 +700,8 @@ class Cache:
         self.owner.lib.ocf_mngt_cache_stop(self.cache_handle, c, None)
 
         c.wait()
-        if c.results["error"]:
+        err = OcfErrorCode(-1 * c.results["error"])
+        if err != OcfErrorCode.OCF_OK and err != OcfErrorCode.OCF_ERR_WRITE_CACHE:
             self.write_unlock()
             raise OcfError("Failed stopping cache", c.results["error"])
 
@@ -712,6 +713,9 @@ class Cache:
 
         self.owner.caches.remove(self)
 
+        if err != OcfErrorCode.OCF_OK:
+            raise OcfError("Failed stopping cache", c.results["error"])
+
     def flush(self):
         self.write_lock()
 

tests/functional/pyocf/types/shared.py

@@ -12,6 +12,7 @@ from ..utils import Size as S
 
 
 class OcfErrorCode(IntEnum):
+    OCF_OK = 0
     OCF_ERR_INVAL = 1000000
     OCF_ERR_AGAIN = auto()
     OCF_ERR_INTR = auto()