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net: stmmac: Check if CBS is supported before configuring

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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>
This commit is contained in:
Jose Abreu 2019-01-09 10:05:58 +01:00 committed by David S. Miller
parent fcc509eb10
commit 0650d4017f
1 changed files with 2 additions and 0 deletions
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2
drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c
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@ -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;