netdev_get_num_tc() is the right method, we should not access
net_device.num_tc directly.

Signed-off-by: Furong Xu <0x1207@gmail.com>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_fpe.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_fpe.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_fpe.c
index fe0877ef5f4f..f07972e47737 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_fpe.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_fpe.c
@@ -304,7 +304,7 @@ int dwmac5_fpe_map_preemption_class(struct net_device *ndev,
 {
 	u32 val, offset, count, queue_weight, preemptible_txqs = 0;
 	struct stmmac_priv *priv = netdev_priv(ndev);
-	u32 num_tc = ndev->num_tc;
+	int num_tc = netdev_get_num_tc(ndev);
 
 	if (!pclass)
 		goto update_mapping;
-- 
2.34.1