[PATCH 1/1] net: thunderx: avoid null pointer dereference

[Heinrich Schuchardt]

In function bgx_lmac_handler only use a member of
lmac after checking it is not null.

Signed-off-by: Heinrich Schuchardt <xypron.g...@gmx.de>
---
 drivers/net/ethernet/cavium/thunder/thunder_bgx.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/cavium/thunder/thunder_bgx.c 
b/drivers/net/ethernet/cavium/thunder/thunder_bgx.c
index d20539a..3ed2198 100644
--- a/drivers/net/ethernet/cavium/thunder/thunder_bgx.c
+++ b/drivers/net/ethernet/cavium/thunder/thunder_bgx.c
@@ -274,12 +274,14 @@ static void bgx_sgmii_change_link_state(struct lmac *lmac)
 static void bgx_lmac_handler(struct net_device *netdev)
 {
        struct lmac *lmac = container_of(netdev, struct lmac, netdev);
-       struct phy_device *phydev = lmac->phydev;
+       struct phy_device *phydev;
        int link_changed = 0;
 
        if (!lmac)
                return;
 
+       phydev = lmac->phydev;
+
        if (!phydev->link && lmac->last_link)
                link_changed = -1;
 
-- 
2.1.4