From: Florian Fainelli f.fainelli@gmail.com
[ Upstream commit 98c5f7d44fef309e692c24c6d71131ee0f0871fb ]
We are still experiencing some packet loss with the existing advanced congestion buffering (ACB) settings with the IMP port configured for 2Gb/sec, so revert to conservative link speeds that do not produce packet loss until this is resolved.
Fixes: 8f1880cbe8d0 ("net: dsa: bcm_sf2: Configure IMP port for 2Gb/sec") Fixes: de34d7084edd ("net: dsa: bcm_sf2: Only 7278 supports 2Gb/sec IMP port") Signed-off-by: Florian Fainelli f.fainelli@gmail.com Reviewed-by: Vivien Didelot vivien.didelot@gmail.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Yang Yingliang yangyingliang@huawei.com --- drivers/net/dsa/bcm_sf2.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/net/dsa/bcm_sf2.c b/drivers/net/dsa/bcm_sf2.c index f181a28..8c69789 100644 --- a/drivers/net/dsa/bcm_sf2.c +++ b/drivers/net/dsa/bcm_sf2.c @@ -73,8 +73,7 @@ static void bcm_sf2_imp_setup(struct dsa_switch *ds, int port) /* Force link status for IMP port */ reg = core_readl(priv, offset); reg |= (MII_SW_OR | LINK_STS); - if (priv->type == BCM7278_DEVICE_ID) - reg |= GMII_SPEED_UP_2G; + reg &= ~GMII_SPEED_UP_2G; core_writel(priv, reg, offset);
/* Enable Broadcast, Multicast, Unicast forwarding to IMP port */