The extra_args argument ($3) of isochron_recv_start is overwritten with
uds ($2), if that argument exists.

This is currently not a problem, because the only TSN selftest
(ocelot/psfp.sh) omits remote sync so it does not specify to the
receiver a UNIX domain socket for ptp4l. So $uds is currently an empty
string.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
---
 tools/testing/selftests/net/forwarding/tsn_lib.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/net/forwarding/tsn_lib.sh b/tools/testing/selftests/net/forwarding/tsn_lib.sh
index 60a1423e8116..1c8e36c56f32 100644
--- a/tools/testing/selftests/net/forwarding/tsn_lib.sh
+++ b/tools/testing/selftests/net/forwarding/tsn_lib.sh
@@ -139,7 +139,7 @@ isochron_recv_start()
 	local extra_args=$3
 
 	if ! [ -z "${uds}" ]; then
-		extra_args="--unix-domain-socket ${uds}"
+		extra_args="${extra_args} --unix-domain-socket ${uds}"
 	fi
 
 	isochron rcv \
-- 
2.34.1