selftests: drv-net: rss: Fix error calculation in test_hitless_key_update

This test verifies there are no errors when a devices RSS key is updated
while traffic is flowing. The current check is a no-op since the last
sample was subtracted from itself.

Signed-off-by: Dimitri Daskalakis <dimitri.daskalakis1@gmail.com>
Link: https://patch.msgid.link/20260303202258.1595661-1-dimitri.daskalakis1@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/tools/testing/selftests/drivers/net/hw/rss_ctx.py b/tools/testing/selftests/drivers/net/hw/rss_ctx.py
index 97246eab863a6ace016a21a1e636f8eaef78c75c..d7cb3030636838e316ee025192388867dc07d3f0 100755 (executable)
--- a/tools/testing/selftests/drivers/net/hw/rss_ctx.py
+++ b/tools/testing/selftests/drivers/net/hw/rss_ctx.py
@@ -357,7 +357,7 @@ def test_hitless_key_update(cfg):
         tgen.wait_pkts_and_stop(5000)
 
     ksft_lt((t1 - t0).total_seconds(), 0.15)
-    ksft_eq(errors1 - errors1, 0)
+    ksft_eq(errors1 - errors0, 0)
     ksft_eq(carrier1 - carrier0, 0)