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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>
This commit is contained in:
Vladimir Oltean 2020-07-13 19:57:06 +03:00 committed by David S. Miller
parent e8e6e73db1
commit b39648079d
1 changed files with 4 additions and 0 deletions
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4
drivers/net/ethernet/mscc/ocelot.c
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@ -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 */