When configured in fixed link, the DaVinci emac driver sets the
priv->phydev to NULL and further ioctl calls to the phy_mii_ioctl()
causes the kernel to crash.
Cc: Brian Hutchinson <b.hutch...@gmail.com>
Fixes: 1bb6aa56bb38 ("net: davinci_emac: Add support for fixed-link PHY")
Signed-off-by: Neil Armstrong <narmstr...@baylibre.com>
---
drivers/net/ethernet/ti/davinci_emac.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/ti/davinci_emac.c
b/drivers/net/ethernet/ti/davinci_emac.c
index 58d58f0..f56d66e 100644
--- a/drivers/net/ethernet/ti/davinci_emac.c
+++ b/drivers/net/ethernet/ti/davinci_emac.c
@@ -1512,7 +1512,10 @@ static int emac_devioctl(struct net_device *ndev, struct
ifreq *ifrq, int cmd)
/* TODO: Add phy read and write and private statistics get feature */
- return phy_mii_ioctl(priv->phydev, ifrq, cmd);
+ if (priv->phydev)
+ return phy_mii_ioctl(priv->phydev, ifrq, cmd);
+ else
+ return -EOPNOTSUPP;
}
static int match_first_device(struct device *dev, void *data)
--
1.9.1
