[PATCH net] selftests: drv-net: pause: Skip support tests without link autonegotiation

[Mohsin Bashir <mohsin.bashr@gmail.com>]

From: Mohsin Bashir <hmohsin@meta.com>

Devices without link autonegotiation support may reject both link-setting
requests in pause_test_support(). On fbnic, all four variants then fail
in cleanup when the deferred restore of unchanged link settings returns
EOPNOTSUPP. Removing the restore alone would report PASS without running
any pause checks.

Fix this by calling require_link_autoneg() before pause_setup() to skip
the test when either interface lacks link autonegotiation support. This
also skips devices that support only forced link configuration.

The issue was observed in the fbnic CI/CD pipeline. It was reproduced and
the fix was tested on a local fbnic device.

Fixes: cbd8a536cd6d ("selftests: drv-net: Introduce a selftest for ethtool flow control")
Signed-off-by: Mohsin Bashir <hmohsin@meta.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 tools/testing/selftests/drivers/net/hw/pause.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/testing/selftests/drivers/net/hw/pause.py b/tools/testing/selftests/drivers/net/hw/pause.py
index ca4a55e59c30..1537f88e0e77 100755
--- a/tools/testing/selftests/drivers/net/hw/pause.py
+++ b/tools/testing/selftests/drivers/net/hw/pause.py
@@ -466,6 +466,7 @@ def pause_test_support(cfg, pauseparams):
     supported fields.
     """
 
+    require_link_autoneg(cfg)
     pause_setup(cfg)
 
     forced = forced_link_settings(cfg)
-- 
2.53.0-Meta