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stmmac: fix adjust link call in case of a switch is attached

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While initializing the phy, the stmmac driver sets the
PHY_IGNORE_INTERRUPT so the PAL won't call the adjust hook
that is needed, on some platforms, e.g. STi, to invoke the glue.

The patch allows the PAL to poll the stmmac_adjust_link just one time
in case of a switch is attached, setting later the PHY_IGNORE_INTERRUPT
flag.
Moving this kind of logic inside the adjust_link it makes sense to
anticipate the check for EEE that will never initialized in this
scenario.

Reported-by: Gabriel Fernandez <gabriel.fernandez@linaro.org>
Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Tested-by: Gabriel Fernandez <gabriel.fernandez@linaro.org>
Cc: Alexandre TORGUE <alexandre.torgue@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Giuseppe CAVALLARO 2016-04-05 08:46:57 +02:00 committed by David S. Miller
parent 6ae81ced37
commit 52f95bbfcf
1 changed files with 10 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
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@ -288,10 +288,6 @@ bool stmmac_eee_init(struct stmmac_priv *priv)
(priv->pcs == STMMAC_PCS_RTBI))
goto out;
/* Never init EEE in case of a switch is attached */
if (priv->phydev->is_pseudo_fixed_link)
goto out;
/* MAC core supports the EEE feature. */
if (priv->dma_cap.eee) {
int tx_lpi_timer = priv->tx_lpi_timer;
@ -771,10 +767,16 @@ static void stmmac_adjust_link(struct net_device *dev)
spin_unlock_irqrestore(&priv->lock, flags);
/* At this stage, it could be needed to setup the EEE or adjust some
* MAC related HW registers.
*/
priv->eee_enabled = stmmac_eee_init(priv);
if (phydev->is_pseudo_fixed_link)
/* Stop PHY layer to call the hook to adjust the link in case
* of a switch is attached to the stmmac driver.
*/
phydev->irq = PHY_IGNORE_INTERRUPT;
else
/* At this stage, init the EEE if supported.
* Never called in case of fixed_link.
*/
priv->eee_enabled = stmmac_eee_init(priv);
}
/**
@ -865,10 +867,6 @@ static int stmmac_init_phy(struct net_device *dev)
return -ENODEV;
}
/* If attached to a switch, there is no reason to poll phy handler */
if (phydev->is_pseudo_fixed_link)
phydev->irq = PHY_IGNORE_INTERRUPT;
pr_debug("stmmac_init_phy: %s: attached to PHY (UID 0x%x)"
" Link = %d\n", dev->name, phydev->phy_id, phydev->link);