net: phylib: add link_change_notify callback to phy device

Add a notify callback to inform phy drivers when the core is about to
do its link adjustment. No change for drivers that do not implement
this callback.

Signed-off-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index 3bc079a67a3d..f7c61812ea4a 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -720,6 +720,9 @@ void phy_state_machine(struct work_struct *work)
 
         mutex_lock(&phydev->lock);
 
+        if (phydev->drv->link_change_notify)
+                phydev->drv->link_change_notify(phydev);
+
         switch (phydev->state) {
         case PHY_DOWN:
         case PHY_STARTING: