Commit 4c30fd07 authored Sep 23, 2020 by Voon Weifeng Committed by Greg Kroah-Hartman Oct 14, 2020

net: stmmac: removed enabling eee in EEE set callback



[ Upstream commit 7241c5a697479c7d0c5a96595822cdab750d41ae ]

EEE should be only be enabled during stmmac_mac_link_up() when the
link are up and being set up properly. set_eee should only do settings
configuration and disabling the eee.

Without this fix, turning on EEE using ethtool will return
"Operation not supported". This is due to the driver is in a dead loop
waiting for eee to be advertised in the for eee to be activated but the
driver will only configure the EEE advertisement after the eee is
activated.

Ethtool should only return "Operation not supported" if there is no EEE
capbility in the MAC controller.

Fixes: 8a7493e58ad6 ("net: stmmac: Fix a race in EEE enable callback")
Signed-off-by: Voon Weifeng <weifeng.voon@intel.com>
Acked-by: Mark Gross <mgross@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

parent b932860a

drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c

+4 −11

Original line number	Diff line number	Diff line
		@@ -616,23 +616,16 @@ static int stmmac_ethtool_op_set_eee(struct net_device *dev,
		struct stmmac_priv *priv = netdev_priv(dev);
		int ret;

		if (!edata->eee_enabled) {
		stmmac_disable_eee_mode(priv);
		} else {
		/* We are asking for enabling the EEE but it is safe
		* to verify all by invoking the eee_init function.
		* In case of failure it will return an error.
		*/
		edata->eee_enabled = stmmac_eee_init(priv);
		if (!edata->eee_enabled)
		if (!priv->dma_cap.eee)
		return -EOPNOTSUPP;
		}

		if (!edata->eee_enabled)
		stmmac_disable_eee_mode(priv);

		ret = phy_ethtool_set_eee(dev->phydev, edata);
		if (ret)
		return ret;

		priv->eee_enabled = edata->eee_enabled;
		priv->tx_lpi_timer = edata->tx_lpi_timer;
		return 0;
		}