selftests: drv-net: rss_ctx: don't fail reconfigure test if queue offset not supported

Vast majority of drivers does not support queue offset.
Simply return if the rss context + queue ntuple fails.

Reviewed-by: Joe Damato <jdamato@fastly.com>
Link: https://patch.msgid.link/20250201013040.725123-5-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Author: kuba-moo

tools/testing/selftests/drivers/net/hw/rss_ctx.py

@@ -260,7 +260,12 @@ def test_rss_queue_reconfigure(cfg, main_ctx=True):
         # change the table to target queues 0 and 2
         ethtool(f"-X {cfg.ifname} {ctx_ref} weight 1 0 1 0")
         # ntuple rule therefore targets queues 1 and 3
-        ntuple2 = ethtool_create(cfg, "-N", flow)
+        try:
+            ntuple2 = ethtool_create(cfg, "-N", flow)
+        except CmdExitFailure:
+            ksft_pr("Driver does not support rss + queue offset")
+            return
+
         defer(ethtool, f"-N {cfg.ifname} delete {ntuple2}")
         # should replace existing filter
         ksft_eq(ntuple, ntuple2)