Check if CBS is currently supported before trying to configure it in HW.
Cc: Joao Pinto <[email protected]>
Cc: David S. Miller <[email protected]>
Cc: Giuseppe Cavallaro <[email protected]>
Cc: Alexandre Torgue <[email protected]>
Signed-off-by: Jose Abreu <[email protected]>
---
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 531294f4978b..58ea18af9813 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;
--
2.7.4
