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Message-Id: <20190213023336.19019-55-sashal@kernel.org> Date: Tue, 12 Feb 2019 21:32:46 -0500 From: Sasha Levin <sashal@...nel.org> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org Cc: Jose Abreu <jose.abreu@...opsys.com>, Joao Pinto <jpinto@...opsys.com>, "David S . Miller" <davem@...emloft.net>, Giuseppe Cavallaro <peppe.cavallaro@...com>, Alexandre Torgue <alexandre.torgue@...com>, Jose Abreu <joabreu@...opsys.com>, Sasha Levin <sashal@...nel.org>, netdev@...r.kernel.org Subject: [PATCH AUTOSEL 4.20 055/105] net: stmmac: Check if CBS is supported before configuring From: Jose Abreu <jose.abreu@...opsys.com> [ Upstream commit 0650d4017f4d2eee67230a02285a7ae5204240c2 ] Check if CBS is currently supported before trying to configure it in HW. Cc: Joao Pinto <jpinto@...opsys.com> Cc: David S. Miller <davem@...emloft.net> Cc: Giuseppe Cavallaro <peppe.cavallaro@...com> Cc: Alexandre Torgue <alexandre.torgue@...com> Signed-off-by: Jose Abreu <joabreu@...opsys.com> Signed-off-by: David S. Miller <davem@...emloft.net> Signed-off-by: Sasha Levin <sashal@...nel.org> --- 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; -- 2.19.1
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