[PATCH net-next 1/2] selftests: drv-net: adjust tests before defaulting to shell=False

[Jakub Kicinski <kuba@kernel.org>]

Clean up tests which expect shell=True without explicitly passing
that param to cmd(). There seems to be only one such case, and
in fact it's better converted to a direct write.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 tools/testing/selftests/drivers/net/napi_threaded.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/drivers/net/napi_threaded.py b/tools/testing/selftests/drivers/net/napi_threaded.py
index ed66efa481b0..f4be72b2145a 100755
--- a/tools/testing/selftests/drivers/net/napi_threaded.py
+++ b/tools/testing/selftests/drivers/net/napi_threaded.py
@@ -24,7 +24,8 @@ from lib.py import cmd, defer, ethtool
 
 
 def _set_threaded_state(cfg, threaded) -> None:
-    cmd(f"echo {threaded} > /sys/class/net/{cfg.ifname}/threaded")
+    with open(f"/sys/class/net/{cfg.ifname}/threaded", "wb") as fp:
+        fp.write(str(threaded).encode('utf-8'))
 
 
 def _setup_deferred_cleanup(cfg) -> None:
-- 
2.51.0