From 0650d4017f4d2eee67230a02285a7ae5204240c2 Mon Sep 17 00:00:00 2001 From: Jose Abreu <jose.abreu@synopsys.com> Date: Wed, 9 Jan 2019 10:05:58 +0100 Subject: [PATCH] net: stmmac: Check if CBS is supported before configuring Check if CBS is currently supported before trying to configure it in HW. Cc: Joao Pinto <jpinto@synopsys.com> Cc: David S. Miller <davem@davemloft.net> Cc: Giuseppe Cavallaro <peppe.cavallaro@st.com> Cc: Alexandre Torgue <alexandre.torgue@st.com> Signed-off-by: Jose Abreu <joabreu@synopsys.com> Signed-off-by: David S. Miller <davem@davemloft.net> --- drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c index 531294f4978bc..58ea18af9813a 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c @@ -301,6 +301,8 @@ static int tc_setup_cbs(struct stmmac_priv *priv, /* Queue 0 is not AVB capable */ if (queue <= 0 || queue >= tx_queues_count) return -EINVAL; + if (!priv->dma_cap.av) + return -EOPNOTSUPP; if (priv->speed != SPEED_100 && priv->speed != SPEED_1000) return -EOPNOTSUPP; -- GitLab