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gianfar: Check if phydev present on ethtool -A

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This fixes a seg fault on 'ethtool -A' entry if the
interface is down.  Obviously we need to have the
phy device initialized / "connected" (see of_phy_connect())
to be able to advertise pause frame capabilities.

Fixes: 23402bddf9e56eecb27bbd1e5467b3b79b3dbe58
Signed-off-by: Claudiu Manoil <claudiu.manoil@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Claudiu Manoil 2014-04-23 16:38:47 +03:00 committed by David S. Miller
parent 00d0cd38fd
commit 98a46d46d1
1 changed files with 3 additions and 0 deletions
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3
drivers/net/ethernet/freescale/gianfar_ethtool.c
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@ -533,6 +533,9 @@ static int gfar_spauseparam(struct net_device *dev,
struct gfar __iomem *regs = priv->gfargrp[0].regs;
u32 oldadv, newadv;
if (!phydev)
return -ENODEV;
if (!(phydev->supported & SUPPORTED_Pause) ||
(!(phydev->supported & SUPPORTED_Asym_Pause) &&
(epause->rx_pause != epause->tx_pause)))