netdev - [PATCH net-next 4/5] net: phy: remove state PHY

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Date:   Wed, 7 Nov 2018 20:46:51 +0100
From:   Heiner Kallweit <hkallweit1@...il.com>
To:     Florian Fainelli <f.fainelli@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        David Miller <davem@...emloft.net>
Cc:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: [PATCH net-next 4/5] net: phy: remove state PHY_AN

After the recent changes in the state machine state PHY_AN isn't used
any longer and can be removed.

Signed-off-by: Heiner Kallweit <hkallweit1@...il.com>
---
 drivers/net/phy/phy.c | 27 ---------------------------
 include/linux/phy.h   | 19 +------------------
 2 files changed, 1 insertion(+), 45 deletions(-)

diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index 87ed00030..226824804 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -50,7 +50,6 @@ static const char *phy_state_to_str(enum phy_state st)
 	PHY_STATE_STR(READY)
 	PHY_STATE_STR(PENDING)
 	PHY_STATE_STR(UP)
-	PHY_STATE_STR(AN)
 	PHY_STATE_STR(RUNNING)
 	PHY_STATE_STR(NOLINK)
 	PHY_STATE_STR(FORCING)
@@ -944,32 +943,6 @@ void phy_state_machine(struct work_struct *work)
 	case PHY_UP:
 		needs_aneg = true;
 
-		phydev->link_timeout = PHY_AN_TIMEOUT;
-
-		break;
-	case PHY_AN:
-		err = phy_read_status(phydev);
-		if (err < 0)
-			break;
-
-		/* If the link is down, give up on negotiation for now */
-		if (!phydev->link) {
-			phydev->state = PHY_NOLINK;
-			phy_link_down(phydev, true);
-			break;
-		}
-
-		/* Check if negotiation is done.  Break if there's an error */
-		err = phy_aneg_done(phydev);
-		if (err < 0)
-			break;
-
-		/* If AN is done, we're running */
-		if (err > 0) {
-			phydev->state = PHY_RUNNING;
-			phy_link_up(phydev);
-		} else if (0 == phydev->link_timeout--)
-			needs_aneg = true;
 		break;
 	case PHY_NOLINK:
 		if (!phy_polling_mode(phydev))
diff --git a/include/linux/phy.h b/include/linux/phy.h
index 9e4d49ef4..2090277ea 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -178,7 +178,6 @@ static inline const char *phy_modes(phy_interface_t interface)
 #define PHY_INIT_TIMEOUT	100000
 #define PHY_STATE_TIME		1
 #define PHY_FORCE_TIMEOUT	10
-#define PHY_AN_TIMEOUT		10
 
 #define PHY_MAX_ADDR	32
 
@@ -297,24 +296,10 @@ struct phy_device *mdiobus_scan(struct mii_bus *bus, int addr);
  *
  * UP: The PHY and attached device are ready to do work.
  * Interrupts should be started here.
- * - timer moves to AN
- *
- * AN: The PHY is currently negotiating the link state.  Link is
- * therefore down for now.  phy_timer will set this state when it
- * detects the state is UP.  config_aneg will set this state
- * whenever called with phydev->autoneg set to AUTONEG_ENABLE.
- * - If autonegotiation finishes, but there's no link, it sets
- *   the state to NOLINK.
- * - If aneg finishes with link, it sets the state to RUNNING,
- *   and calls adjust_link
- * - If autonegotiation did not finish after an arbitrary amount
- *   of time, autonegotiation should be tried again if the PHY
- *   supports "magic" autonegotiation (back to AN)
- * - If it didn't finish, and no magic_aneg, move to FORCING.
+ * - timer moves to NOLINK or RUNNING
  *
  * NOLINK: PHY is up, but not currently plugged in.
  * - If the timer notes that the link comes back, we move to RUNNING
- * - config_aneg moves to AN
  * - phy_stop moves to HALTED
  *
  * FORCING: PHY is being configured with forced settings
@@ -329,7 +314,6 @@ struct phy_device *mdiobus_scan(struct mii_bus *bus, int addr);
  *   link state is polled every other cycle of this state machine,
  *   which makes it every other second)
  * - irq will set CHANGELINK
- * - config_aneg will set AN
  * - phy_stop moves to HALTED
  *
  * CHANGELINK: PHY experienced a change in link state
@@ -353,7 +337,6 @@ enum phy_state {
 	PHY_READY,
 	PHY_PENDING,
 	PHY_UP,
-	PHY_AN,
 	PHY_RUNNING,
 	PHY_NOLINK,
 	PHY_FORCING,
-- 
2.19.1