[PATCH] net: ocelot_board: fix a NULL pointer dereference

[Kangjie Lu]

In case devm_kcalloc fails, the fix returns -ENOMEM to avoid
NULL pointer dereference.

Signed-off-by: Kangjie Lu <kjlu@xxxxxxx>
---
 drivers/net/ethernet/mscc/ocelot_board.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/mscc/ocelot_board.c b/drivers/net/ethernet/mscc/ocelot_board.c
index e7f90101d2e0..af68abf1632a 100644
--- a/drivers/net/ethernet/mscc/ocelot_board.c
+++ b/drivers/net/ethernet/mscc/ocelot_board.c
@@ -256,6 +256,8 @@ static int mscc_ocelot_probe(struct platform_device *pdev)
 
 	ocelot->ports = devm_kcalloc(&pdev->dev, ocelot->num_phys_ports,
 				     sizeof(struct ocelot_port *), GFP_KERNEL);
+	if (!ocelot->ports)
+		return -ENOMEM;
 
 	INIT_LIST_HEAD(&ocelot->multicast);
 	ocelot_init(ocelot);
-- 
2.17.1