From: Florian Fainelli <f.fainelli@gmail.com>
Date: Thu, 28 Aug 2014 00:04:53 +0000 (-0700)
Subject: net: dsa: allow drivers to do link adjustment
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=ec9436baedb6;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

net: dsa: allow drivers to do link adjustment

Whenever libphy determines that the link status of a given PHY/port has
changed, allow to call into the switch driver link adjustment callback
so proper actions can be taken care of by the switch driver upon link
notification.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/include/net/dsa.h b/include/net/dsa.h
index 1035f6452d79..2d3835924dd2 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -16,6 +16,7 @@
 #include <linux/timer.h>
 #include <linux/workqueue.h>
 #include <linux/of.h>
+#include <linux/phy.h>
 
 #define DSA_MAX_SWITCHES	4
 #define DSA_MAX_PORTS		12
@@ -181,6 +182,12 @@ struct dsa_switch_driver {
 	 */
 	void	(*poll_link)(struct dsa_switch *ds);
 
+	/*
+	 * Link state adjustment (called from libphy)
+	 */
+	void	(*adjust_link)(struct dsa_switch *ds, int port,
+				struct phy_device *phydev);
+
 	/*
 	 * ethtool hardware statistics.
 	 */
diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index 241c2a1684cb..398d0663d3dd 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -333,6 +333,7 @@ static const struct dsa_device_ops notag_netdev_ops = {
 static void dsa_slave_adjust_link(struct net_device *dev)
 {
 	struct dsa_slave_priv *p = netdev_priv(dev);
+	struct dsa_switch *ds = p->parent;
 	unsigned int status_changed = 0;
 
 	if (p->old_link != p->phy->link) {
@@ -350,6 +351,9 @@ static void dsa_slave_adjust_link(struct net_device *dev)
 		p->old_pause = p->phy->pause;
 	}
 
+	if (ds->drv->adjust_link && status_changed)
+		ds->drv->adjust_link(ds, p->port, p->phy);
+
 	if (status_changed)
 		phy_print_status(p->phy);
 }