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net, phy, cpsw: fix NULL pointer deference

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if phy_connect() did not find a phy, phydev is NULL and
following code in cpsw_phy_init() crashes. Fix this.

Signed-off-by: Heiko Schocher <hs@denx.de>
Cc: Joe Hershberger <joe.hershberger@gmail.com>
Cc: Mugunthan V N <mugunthanvnm@ti.com>
Cc: Tom Rini <trini@ti.com>
Acked-by: Mugunthan V N <mugunthanvnm@ti.com>
This commit is contained in:
Heiko Schocher 2013-09-05 11:50:41 +02:00 committed by Tom Rini
parent e22cc0cf13
commit 93ff255298
1 changed files with 9 additions and 1 deletions
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10
drivers/net/cpsw.c
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@ -568,9 +568,14 @@ static void cpsw_set_slave_mac(struct cpsw_slave *slave,
static void cpsw_slave_update_link(struct cpsw_slave *slave,
struct cpsw_priv *priv, int *link)
{
struct phy_device *phy = priv->phydev;
struct phy_device *phy;
u32 mac_control = 0;
phy = priv->phydev;
if (!phy)
return;
phy_startup(phy);
*link = phy->link;
@ -947,6 +952,9 @@ static int cpsw_phy_init(struct eth_device *dev, struct cpsw_slave *slave)
dev,
slave->data->phy_if);
if (!phydev)
return -1;
phydev->supported &= supported;
phydev->advertising = phydev->supported;