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Date:   Wed, 30 Dec 2020 13:42:51 +0200
From:   Ido Schimmel <>
Cc:,,,, Ido Schimmel <>
Subject: [PATCH net] selftests: mlxsw: Set headroom size of correct port

From: Ido Schimmel <>

The test was setting the headroom size of the wrong port. This was not
visible because of a firmware bug that canceled this bug.

Set the headroom size of the correct port, so that the test will pass
with both old and new firmware versions.

Fixes: bfa804784e32 ("selftests: mlxsw: Add a PFC test")
Signed-off-by: Ido Schimmel <>
Reviewed-by: Petr Machata <>
 tools/testing/selftests/drivers/net/mlxsw/ | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/drivers/net/mlxsw/ b/tools/testing/selftests/drivers/net/mlxsw/
index 4d900bc1f76c..5c7700212f75 100755
--- a/tools/testing/selftests/drivers/net/mlxsw/
+++ b/tools/testing/selftests/drivers/net/mlxsw/
@@ -230,7 +230,7 @@ switch_create()
 	__mlnx_qos -i $swp4 --pfc=0,1,0,0,0,0,0,0 >/dev/null
 	# PG0 will get autoconfigured to Xoff, give PG1 arbitrarily 100K, which
 	# is (-2*MTU) about 80K of delay provision.
-	__mlnx_qos -i $swp3 --buffer_size=0,$_100KB,0,0,0,0,0,0 >/dev/null
+	__mlnx_qos -i $swp4 --buffer_size=0,$_100KB,0,0,0,0,0,0 >/dev/null
 	# bridges
 	# -------

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