linux-kernel - [PATCH 3.16 032/178] net: bcmgenet: add begin/complete ethtool ops

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Date:   Sun, 16 Jul 2017 14:56:46 +0100
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org, "Edwin Chan" <edwin.chan@...adcom.com>,
        "Doug Berger" <opendmb@...il.com>,
        "Florian Fainelli" <f.fainelli@...il.com>,
        "David S. Miller" <davem@...emloft.net>
Subject: [PATCH 3.16 032/178] net: bcmgenet: add begin/complete ethtool ops

3.16.46-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Edwin Chan <edwin.chan@...adcom.com>

commit 89316fa34ab8afac8d693f41a5bc268673f1da15 upstream.

Make sure clock is enabled for ethtool ops.

Fixes: 1c1008c793fa ("net: bcmgenet: add main driver file")
Signed-off-by: Edwin Chan <edwin.chan@...adcom.com>
Signed-off-by: Doug Berger <opendmb@...il.com>
Reviewed-by: Florian Fainelli <f.fainelli@...il.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
[bwh: Backported to 3.16: adjust context]
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/net/ethernet/broadcom/genet/bcmgenet.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

--- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c
+++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
@@ -370,6 +370,22 @@ static inline void bcmgenet_rdma_ring_wr
 			genet_dma_ring_regs[r]);
 }
 
+static int bcmgenet_begin(struct net_device *dev)
+{
+	struct bcmgenet_priv *priv = netdev_priv(dev);
+
+	/* Turn on the clock */
+	return clk_prepare_enable(priv->clk);
+}
+
+static void bcmgenet_complete(struct net_device *dev)
+{
+	struct bcmgenet_priv *priv = netdev_priv(dev);
+
+	/* Turn off the clock */
+	clk_disable_unprepare(priv->clk);
+}
+
 static int bcmgenet_get_settings(struct net_device *dev,
 		struct ethtool_cmd *cmd)
 {
@@ -774,6 +790,8 @@ static void bcmgenet_get_ethtool_stats(s
 
 /* standard ethtool support functions. */
 static struct ethtool_ops bcmgenet_ethtool_ops = {
+	.begin			= bcmgenet_begin,
+	.complete		= bcmgenet_complete,
 	.get_strings		= bcmgenet_get_strings,
 	.get_sset_count		= bcmgenet_get_sset_count,
 	.get_ethtool_stats	= bcmgenet_get_ethtool_stats,