net: dsa: bcm_sf2: force pause link settings

The pause settings reported by the PHY should also be applied to the GMII port
status override otherwise the switch will not generate pause frames towards the
link partner despite the advertisement saying otherwise.

Fixes: 246d7f773c ("net: dsa: add Broadcom SF2 switch driver")
Signed-off-by: Doug Berger <opendmb@gmail.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20220623030204.1966851-1-f.fainelli@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/dsa/bcm_sf2.c

@@ -878,6 +878,11 @@ static void bcm_sf2_sw_mac_link_up(struct dsa_switch *ds, int port,
 		if (duplex == DUPLEX_FULL)
 			reg |= DUPLX_MODE;
 
+		if (tx_pause)
+			reg |= TXFLOW_CNTL;
+		if (rx_pause)
+			reg |= RXFLOW_CNTL;
+
 		core_writel(priv, reg, offset);
 	}