[PATCH 5.15 550/917] net: phylink: avoid mvneta warning when setting pause parameters

Greg Kroah-Hartman
2021-11-15T23:47:46Z

From: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>

[ Upstream commit fd8d9731bcdfb22d28e45bce789bcb211c868c78 ]

mvneta does not support asymetric pause modes, and it flags this by the
lack of AsymPause in the supported field. When setting pause modes, we
check that pause->rx_pause == pause->tx_pause, but only when pause
autoneg is enabled. When pause autoneg is disabled, we still allow
pause->rx_pause != pause->tx_pause, which is incorrect when the MAC
does not support asymetric pause, and causes mvneta to issue a warning.

Fix this by removing the test for pause->autoneg, so we always check
that pause->rx_pause == pause->tx_pause for network devices that do not
support AsymPause.

Fixes: 9525ae83959b ("phylink: add phylink infrastructure")
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/phy/phylink.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c
index 5a58c77d00022..7ec3105010ac1 100644
--- a/drivers/net/phy/phylink.c
+++ b/drivers/net/phy/phylink.c
@@ -1727,7 +1727,7 @@ int phylink_ethtool_set_pauseparam(struct phylink *pl,
return -EOPNOTSUPP;

if (!phylink_test(pl->supported, Asym_Pause) &&
- !pause->autoneg && pause->rx_pause != pause->tx_pause)
+ pause->rx_pause != pause->tx_pause)
return -EINVAL;

pause_state = 0;
--
2.33.0