netdev - [PATCH net-next 1/2] net: phy: remove parameter new_link from phy_mac

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Message-ID: <80e1b32e-8d8a-a6a2-9e44-65fca8ae9cc2@gmail.com>
Date:   Wed, 10 Jan 2018 21:11:35 +0100
From:   Heiner Kallweit <hkallweit1@...il.com>
To:     Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        David Miller <davem@...emloft.net>,
        Doug Berger <opendmb@...il.com>
Cc:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: [PATCH net-next 1/2] net: phy: remove parameter new_link from
 phy_mac_interrupt()

I see two issues with parameter new_link:

1. It's not needed. See also phy_interrupt(), works w/o this parameter.
   phy_mac_interrupt sets the state to PHY_CHANGELINK and triggers the
   state machine which then calls phy_read_status. And phy_read_status
   updates the link state.

2. phy_mac_interrupt is used in interrupt context and getting the link
   state may sleep (at least when having to access the PHY registers
   via MDIO bus).

So let's remove it.

Signed-off-by: Heiner Kallweit <hkallweit1@...il.com>
---
 drivers/net/phy/phy.c | 10 +++-------
 include/linux/phy.h   |  2 +-
 2 files changed, 4 insertions(+), 8 deletions(-)

diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index 0c165ad1d..f3313a129 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -1057,16 +1057,12 @@ void phy_state_machine(struct work_struct *work)
 /**
  * phy_mac_interrupt - MAC says the link has changed
  * @phydev: phy_device struct with changed link
- * @new_link: Link is Up/Down.
  *
- * Description: The MAC layer is able indicate there has been a change
- *   in the PHY link status. Set the new link status, and trigger the
- *   state machine, work a work queue.
+ * The MAC layer is able to indicate there has been a change in the PHY link
+ * status. Trigger the state machine and work a work queue.
  */
-void phy_mac_interrupt(struct phy_device *phydev, int new_link)
+void phy_mac_interrupt(struct phy_device *phydev)
 {
-	phydev->link = new_link;
-
 	/* Trigger a state machine change */
 	queue_work(system_power_efficient_wq, &phydev->phy_queue);
 }
diff --git a/include/linux/phy.h b/include/linux/phy.h
index 135aba5c3..47715a311 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -964,7 +964,7 @@ int phy_drivers_register(struct phy_driver *new_driver, int n,
 void phy_state_machine(struct work_struct *work);
 void phy_change(struct phy_device *phydev);
 void phy_change_work(struct work_struct *work);
-void phy_mac_interrupt(struct phy_device *phydev, int new_link);
+void phy_mac_interrupt(struct phy_device *phydev);
 void phy_start_machine(struct phy_device *phydev);
 void phy_stop_machine(struct phy_device *phydev);
 void phy_trigger_machine(struct phy_device *phydev, bool sync);
-- 
2.15.1