[PATCH] stmmac_dt_phy: null check the allocation

[Navid Emamdoost]

devm_kzalloc may fail and return NULL. So the null check is needed.

Signed-off-by: Navid Emamdoost <navid.emamdo...@gmail.com>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c 
b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
index 73fc2524372e..392f8d9539c1 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
@@ -342,10 +342,13 @@ static int stmmac_dt_phy(struct plat_stmmacenet_data 
*plat,
                mdio = true;
        }
 
-       if (mdio)
+       if (mdio) {
                plat->mdio_bus_data =
                        devm_kzalloc(dev, sizeof(struct stmmac_mdio_bus_data),
                                     GFP_KERNEL);
+               if (!plat->mdio_bus_data)
+                       return -ENOMEM;
+       }
        return 0;
 }
 
-- 
2.17.1