netdev - [PATCH net-next 05/10] be2net: don't enable PAUSE by default

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Message-Id: <1430722042-26449-6-git-send-email-sathya.perla@emulex.com>
Date:	Mon,  4 May 2015 02:47:17 -0400
From:	Sathya Perla <sathya.perla@...lex.com>
To:	netdev@...r.kernel.org
Subject: [PATCH net-next 05/10] be2net: don't enable PAUSE by default

From: Kalesh AP <kalesh.purayil@...lex.com>

The driver so far, on load, always tried to enable RX/TX general pause.
This setting always fails on certain profiles (like FCoE) where PFC is
needed. Such failures cannot be effectively communicated to the stack or
user. To fix this unpredictability in state, this patch changes the driver
behavior by not configuring pause at load time.
The user can configure it via ethtool and if the setting is disallowed,
an appropriate error is returned.

Signed-off-by: Kalesh AP <kalesh.purayil@...lex.com>
Signed-off-by: Sathya Perla <sathya.perla@...lex.com>
---
 drivers/net/ethernet/emulex/benet/be_ethtool.c |  5 ++++-
 drivers/net/ethernet/emulex/benet/be_main.c    | 12 ------------
 2 files changed, 4 insertions(+), 13 deletions(-)

diff --git a/drivers/net/ethernet/emulex/benet/be_ethtool.c b/drivers/net/ethernet/emulex/benet/be_ethtool.c
index 61321de..8b50021 100644
--- a/drivers/net/ethernet/emulex/benet/be_ethtool.c
+++ b/drivers/net/ethernet/emulex/benet/be_ethtool.c
@@ -717,7 +717,10 @@ be_set_pauseparam(struct net_device *netdev, struct ethtool_pauseparam *ecmd)
 	status = be_cmd_set_flow_control(adapter, ecmd->tx_pause,
 					 ecmd->rx_pause);
 	if (status) {
-		dev_warn(&adapter->pdev->dev, "Pause param set failed\n");
+		dev_warn(&adapter->pdev->dev,
+			 "Failed to set Ethernet flow control parameters\n");
+		if (base_status(status) == MCC_STATUS_FEATURE_NOT_SUPPORTED)
+			return -EOPNOTSUPP;
 		return be_cmd_status(status);
 	}
 
diff --git a/drivers/net/ethernet/emulex/benet/be_main.c b/drivers/net/ethernet/emulex/benet/be_main.c
index b25c509..66749d0 100644
--- a/drivers/net/ethernet/emulex/benet/be_main.c
+++ b/drivers/net/ethernet/emulex/benet/be_main.c
@@ -4248,15 +4248,6 @@ static int be_setup(struct be_adapter *adapter)
 
 	be_set_rx_mode(adapter->netdev);
 
-	status = be_cmd_set_flow_control(adapter, adapter->tx_fc,
-					 adapter->rx_fc);
-	if (status)
-		be_cmd_get_flow_control(adapter, &adapter->tx_fc,
-					&adapter->rx_fc);
-
-	dev_info(&adapter->pdev->dev, "HW Flow control - TX:%d RX:%d\n",
-		 adapter->tx_fc, adapter->rx_fc);
-
 	if (be_physfn(adapter))
 		be_cmd_set_logical_link_config(adapter,
 					       IFLA_VF_LINK_STATE_AUTO, 0);
@@ -5441,9 +5432,6 @@ static int be_drv_init(struct be_adapter *adapter)
 	INIT_DELAYED_WORK(&adapter->be_err_detection_work,
 			  be_err_detection_task);
 
-	adapter->rx_fc = true;
-	adapter->tx_fc = true;
-
 	/* Must be a power of 2 or else MODULO will BUG_ON */
 	adapter->be_get_temp_freq = 64;
 
-- 
2.2.0

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