diff options
Diffstat (limited to 'drivers/net/phy/phy_device.c')
| -rw-r--r-- | drivers/net/phy/phy_device.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c index 0aadef9fc7dd..9c06f8028f0c 100644 --- a/drivers/net/phy/phy_device.c +++ b/drivers/net/phy/phy_device.c @@ -1719,6 +1719,25 @@ static int phy_probe(struct device *dev) */ of_set_phy_eee_broken(phydev); + /* The Pause Frame bits indicate that the PHY can support passing + * pause frames. During autonegotiation, the PHYs will determine if + * they should allow pause frames to pass. The MAC driver should then + * use that result to determine whether to enable flow control via + * pause frames. + * + * Normally, PHY drivers should not set the Pause bits, and instead + * allow phylib to do that. However, there may be some situations + * (e.g. hardware erratum) where the driver wants to set only one + * of these bits. + */ + if (phydrv->features & (SUPPORTED_Pause | SUPPORTED_Asym_Pause)) { + phydev->supported &= ~(SUPPORTED_Pause | SUPPORTED_Asym_Pause); + phydev->supported |= phydrv->features & + (SUPPORTED_Pause | SUPPORTED_Asym_Pause); + } else { + phydev->supported |= SUPPORTED_Pause | SUPPORTED_Asym_Pause; + } + /* Set the state to READY by default */ phydev->state = PHY_READY; |