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[net-next,V1,1/4] net/mlx4_en: Disable global flow control when PFC enabled

Message ID 1377013369-14711-2-git-send-email-amirv@mellanox.com
State Changes Requested, archived
Delegated to: David Miller
Headers show

Commit Message

Amir Vadai Aug. 20, 2013, 3:42 p.m. UTC 
From: Eugenia Emantayev <eugenia@mellanox.com>

Fix a bug when FC and PFC are enabled/disabled at the same time.
According to ConnectX-3 Programmer Manual these two features are mutial
exclusive.  So make sure when enabling PFC to turn off global FC and
vise versa.  Otherwise it hurts the performance.


Signed-off-by: Eugenia Emantayev <eugenia@mellanox.com>
Signed-off-by: Amir Vadai <amirv@mellanox.com>
---
 drivers/net/ethernet/mellanox/mlx4/en_dcb_nl.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
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Patch

diff --git a/drivers/net/ethernet/mellanox/mlx4/en_dcb_nl.c b/drivers/net/ethernet/mellanox/mlx4/en_dcb_nl.c
index 9d4a1ea..fcef764 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_dcb_nl.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_dcb_nl.c
@@ -169,7 +169,8 @@  static int mlx4_en_dcbnl_ieee_setpfc(struct net_device *dev,
 			pfc->mbc,
 			pfc->delay);
 
-	priv->prof->rx_pause = priv->prof->tx_pause = !!pfc->pfc_en;
+	priv->prof->rx_pause = !pfc->pfc_en;
+	priv->prof->tx_pause = !pfc->pfc_en;
 	priv->prof->rx_ppp = priv->prof->tx_ppp = pfc->pfc_en;
 
 	err = mlx4_SET_PORT_general(mdev->dev, priv->port,