[PATCH 4.19 066/346] selftests/bpf/test_offload.py: Reset ethtool features after failed setting

[Greg Kroah-Hartman]

From: Toke Høiland-Jørgensen <toke@xxxxxxxxxx>

[ Upstream commit 766e62b7fcd2cf1d43e6594ba37c659dc48f7ddb ]

When setting the ethtool feature flag fails (as expected for the test), the
kernel now tracks that the feature was requested to be 'off' and refuses to
subsequently disable it again. So reset it back to 'on' so a subsequent
disable (that's not supposed to fail) can succeed.

Fixes: 417ec26477a5 ("selftests/bpf: add offload test based on netdevsim")
Signed-off-by: Toke Høiland-Jørgensen <toke@xxxxxxxxxx>
Signed-off-by: Daniel Borkmann <daniel@xxxxxxxxxxxxx>
Acked-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Link: https://lore.kernel.org/bpf/160752226280.110217.10696241563705667871.stgit@xxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 tools/testing/selftests/bpf/test_offload.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/testing/selftests/bpf/test_offload.py b/tools/testing/selftests/bpf/test_offload.py
index d59642e70f562..2229e55216a97 100755
--- a/tools/testing/selftests/bpf/test_offload.py
+++ b/tools/testing/selftests/bpf/test_offload.py
@@ -787,6 +787,7 @@ try:
     start_test("Test disabling TC offloads is rejected while filters installed...")
     ret, _ = sim.set_ethtool_tc_offloads(False, fail=False)
     fail(ret == 0, "Driver should refuse to disable TC offloads with filters installed...")
+    sim.set_ethtool_tc_offloads(True)
 
     start_test("Test qdisc removal frees things...")
     sim.tc_flush_filters()
-- 
2.27.0