From b39648079db40874df97c5104066f8a9fc3daa0c Mon Sep 17 00:00:00 2001 From: Vladimir Oltean <vladimir.oltean@nxp.com> Date: Mon, 13 Jul 2020 19:57:06 +0300 Subject: [PATCH] net: mscc: ocelot: disable flow control on NPI interface The Ocelot switches do not support flow control on Ethernet interfaces where a DSA tag must be added. If pause frames are enabled, they will be encapsulated in the DSA tag just like regular frames, and the DSA master will not recognize them. Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> --- drivers/net/ethernet/mscc/ocelot.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/net/ethernet/mscc/ocelot.c b/drivers/net/ethernet/mscc/ocelot.c index aca805b9c0b33..2a44305912d2f 100644 --- a/drivers/net/ethernet/mscc/ocelot.c +++ b/drivers/net/ethernet/mscc/ocelot.c @@ -1401,6 +1401,10 @@ void ocelot_configure_cpu(struct ocelot *ocelot, int npi, extraction); ocelot_fields_write(ocelot, npi, SYS_PORT_MODE_INCL_INJ_HDR, injection); + + /* Disable transmission of pause frames */ + ocelot_rmw_rix(ocelot, 0, SYS_PAUSE_CFG_PAUSE_ENA, + SYS_PAUSE_CFG, npi); } /* Enable CPU port module */