diff options
| author | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2014-08-07 22:17:07 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-08-07 16:02:58 -0700 |
| commit | 6f2c9bd85eee30fd77e6c65c097769ad0d6d7352 (patch) | |
| tree | 5e0ed046be13ca7ad269ff24c9a8b24d70775898 /drivers/net/ethernet/freescale/gianfar.c | |
| parent | c891c24c62b376e508a45eeeb9f37e1b94173126 (diff) | |
| download | linux-6f2c9bd85eee30fd77e6c65c097769ad0d6d7352.tar.bz2 | |
net: gianfar: fix reference counting for phy_node
The line before the changed if condition is:
priv->phy_node = of_parse_phandle(np, "phy-handle", 0);
. If this call succeeds priv->phy_node must not be overwritten in the if
block; otherwise the reference to the node returned by of_parse_phandle
is lost. So add a check that the if block isn't executed in this case.
Furthermore in the fixed phy case no reference is aquired for phy_node
resulting in an of_node_put without holding a reference. To fix that,
get a reference on the MAC dt node.
Fixes: be40364544bd ("gianfar: use the new fixed PHY helpers")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/freescale/gianfar.c')
| -rw-r--r-- | drivers/net/ethernet/freescale/gianfar.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/net/ethernet/freescale/gianfar.c b/drivers/net/ethernet/freescale/gianfar.c index 6b0c4775cd0d..fb29d049f4e1 100644 --- a/drivers/net/ethernet/freescale/gianfar.c +++ b/drivers/net/ethernet/freescale/gianfar.c @@ -892,12 +892,12 @@ static int gfar_of_init(struct platform_device *ofdev, struct net_device **pdev) /* In the case of a fixed PHY, the DT node associated * to the PHY is the Ethernet MAC DT node. */ - if (of_phy_is_fixed_link(np)) { + if (!priv->phy_node && of_phy_is_fixed_link(np)) { err = of_phy_register_fixed_link(np); if (err) goto err_grp_init; - priv->phy_node = np; + priv->phy_node = of_node_get(np); } /* Find the TBI PHY. If it's not there, we don't support SGMII */ |