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Date:   Tue, 15 Nov 2016 11:20:03 +0100
From:   "Allan W. Nielsen" <allan.nielsen@...rosemi.com>
To:     <netdev@...r.kernel.org>
CC:     <andrew@...n.ch>, <raju.lakkaraju@...rosemi.com>,
        <allan.nielsen@...rosemi.com>,
        Raju Lakkaraju <Raju.Lakkaraju@...rosemi.com>
Subject: [PATCH net-next v3 4/5] ethtool: Core impl for ETHTOOL_PHY_DOWNSHIFT tunable

From: Raju Lakkaraju <Raju.Lakkaraju@...rosemi.com>

Adding validation support for the ETHTOOL_PHY_DOWNSHIFT. Functional
implementation needs to be done in the individual PHY drivers.

Signed-off-by: Raju Lakkaraju <Raju.Lakkaraju@...rosemi.com>
Reviewed-by: Andrew Lunn <andrew@...n.ch>
Signed-off-by: Allan W. Nielsen <allan.nielsen@...rosemi.com>
---
 net/core/ethtool.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/net/core/ethtool.c b/net/core/ethtool.c
index 61aebdf..e9b45567 100644
--- a/net/core/ethtool.c
+++ b/net/core/ethtool.c
@@ -122,6 +122,7 @@ tunable_strings[__ETHTOOL_TUNABLE_COUNT][ETH_GSTRING_LEN] = {
 static const char
 phy_tunable_strings[__ETHTOOL_PHY_TUNABLE_COUNT][ETH_GSTRING_LEN] = {
 	[ETHTOOL_ID_UNSPEC]     = "Unspec",
+	[ETHTOOL_PHY_DOWNSHIFT]	= "phy-downshift",
 };
 
 static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
@@ -2435,6 +2436,11 @@ static int ethtool_set_per_queue(struct net_device *dev, void __user *useraddr)
 static int ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna)
 {
 	switch (tuna->id) {
+	case ETHTOOL_PHY_DOWNSHIFT:
+		if (tuna->len != sizeof(u8) ||
+		    tuna->type_id != ETHTOOL_TUNABLE_U8)
+			return -EINVAL;
+		break;
 	default:
 		return -EINVAL;
 	}
-- 
2.7.3

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