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[v3,net,1/2] net: mscc: ocelot: remove buggy and useless write to ANA_PFC_PFC_CFG

Message ID 20210917153905.1173010-2-colin.foster@in-advantage.com (mailing list archive)
State Accepted
Commit 163957c43d96c2409d9d9d2e94823f7300f6e52c
Delegated to: Netdev Maintainers
Headers show
Series ocelot phylink fixes | expand

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Commit Message

Colin Foster Sept. 17, 2021, 3:39 p.m. UTC
A useless write to ANA_PFC_PFC_CFG was left in while refactoring ocelot to
phylink. Since priority flow control is disabled, writing the speed has no
effect.

Further, it was using ethtool.h SPEED_ instead of OCELOT_SPEED_ macros,
which are incorrectly offset for GENMASK.

Lastly, for priority flow control to properly function, some scenarios
would rely on the rate adaptation from the PCS while the MAC speed would
be fixed. So it isn't used, and even if it was, neither "speed" nor
"mac_speed" are necessarily the correct values to be used.

Fixes: e6e12df625f2 ("net: mscc: ocelot: convert to phylink")
Signed-off-by: Colin Foster <colin.foster@in-advantage.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
---
 drivers/net/ethernet/mscc/ocelot.c | 4 ----
 1 file changed, 4 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/mscc/ocelot.c b/drivers/net/ethernet/mscc/ocelot.c
index c581b955efb3..08be0440af28 100644
--- a/drivers/net/ethernet/mscc/ocelot.c
+++ b/drivers/net/ethernet/mscc/ocelot.c
@@ -569,10 +569,6 @@  void ocelot_phylink_mac_link_up(struct ocelot *ocelot, int port,
 	ocelot_port_writel(ocelot_port, DEV_CLOCK_CFG_LINK_SPEED(speed),
 			   DEV_CLOCK_CFG);
 
-	/* No PFC */
-	ocelot_write_gix(ocelot, ANA_PFC_PFC_CFG_FC_LINK_SPEED(speed),
-			 ANA_PFC_PFC_CFG, port);
-
 	/* Core: Enable port for frame transfer */
 	ocelot_fields_write(ocelot, port,
 			    QSYS_SWITCH_PORT_MODE_PORT_ENA, 1);