linux-kernel - [PATCH v2] net: driver: stmicro: Remove some useless the lock protection

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Message-ID: <1400982824-3871-1-git-send-email-Wei.Yang@windriver.com>
Date:	Sun, 25 May 2014 09:53:44 +0800
From:	<Wei.Yang@...driver.com>
To:	<davem@...emloft.net>
CC:	<peppe.cavallaro@...com>, <wei.yang@...driver.com>,
	<netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH v2] net: driver: stmicro: Remove some useless the lock protection

From: Yang Wei <Wei.Yang@...driver.com>

kernel always invokes a pair of rtnl_lock adn rtnl_unlock to
protect dev_ethtool(), so its not neccessary to invoke spin_lock/unlock
in ethtool_ops.

Signed-off-by: Yang Wei <Wei.Yang@...driver.com>
---
Hi David,

   I regenerate this patch based on net/next repo in v2.

Wei
 .../net/ethernet/stmicro/stmmac/stmmac_ethtool.c   |    6 ------
 1 file changed, 6 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
index c963394..7892666 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
@@ -322,9 +322,7 @@ static int stmmac_ethtool_getsettings(struct net_device *dev,
 		return -EBUSY;
 	}
 	cmd->transceiver = XCVR_INTERNAL;
-	spin_lock_irq(&priv->lock);
 	rc = phy_ethtool_gset(phy, cmd);
-	spin_unlock_irq(&priv->lock);
 	return rc;
 }
 
@@ -442,7 +440,6 @@ stmmac_get_pauseparam(struct net_device *netdev,
 	if (priv->flow_ctrl & FLOW_TX)
 		pause->tx_pause = 1;
 
-	spin_unlock(&priv->lock);
 }
 
 static int
@@ -457,8 +454,6 @@ stmmac_set_pauseparam(struct net_device *netdev,
 	if (priv->pcs)	/* FIXME */
 		return -EOPNOTSUPP;
 
-	spin_lock(&priv->lock);
-
 	if (pause->rx_pause)
 		new_pause |= FLOW_RX;
 	if (pause->tx_pause)
@@ -473,7 +468,6 @@ stmmac_set_pauseparam(struct net_device *netdev,
 	} else
 		priv->hw->mac->flow_ctrl(priv->ioaddr, phy->duplex,
 					 priv->flow_ctrl, priv->pause);
-	spin_unlock(&priv->lock);
 	return ret;
 }
 
-- 
1.7.9.5

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