[PATCH] iotests: fix source directory location

[John Snow <jsnow@redhat.com>]

If you invoke the check script from outside of the tests/qemu-iotests
directory, the directories initialized as source_iotests and
build_iotests will be incorrect.

We can use the location of the source file itself to be more accurate.

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
---
 tests/qemu-iotests/testenv.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tests/qemu-iotests/testenv.py b/tests/qemu-iotests/testenv.py
index a864c74b123..9b0f01e84db 100644
--- a/tests/qemu-iotests/testenv.py
+++ b/tests/qemu-iotests/testenv.py
@@ -217,10 +217,10 @@ def __init__(self, imgfmt: str, imgproto: str, aiomode: str,
             self.build_iotests = os.path.dirname(os.path.abspath(sys.argv[0]))
         else:
             # called from the source tree
-            self.source_iotests = os.getcwd()
+            self.source_iotests = str(Path(__file__, '..').resolve())
             self.build_iotests = self.source_iotests
 
-        self.build_root = os.path.join(self.build_iotests, '..', '..')
+        self.build_root = str(Path(self.build_iotests, '../..').resolve())
 
         self.init_directories()
         self.init_binaries()
-- 
2.34.1