[PATCH net-next] net: phy: remove state PHY_FORCING

[PATCH net-next] net: phy: remove state PHY_FORCING

[Heiner Kallweit]

In the early days of phylib we had a functionality that changed to the
next lower speed in fixed mode if no link was established after a
certain period of time. This functionality has been removed years ago,
and state PHY_FORCING isn't needed any longer. Instead we can go from
UP to RUNNING or NOLINK directly (same as in autoneg mode).

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
---
 drivers/net/phy/phy.c | 26 ++------------------------
 include/linux/phy.h   | 11 -----------
 2 files changed, 2 insertions(+), 35 deletions(-)

diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index 84671d868..8aab104bb 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -43,7 +43,6 @@ static const char *phy_state_to_str(enum phy_state st)
 	PHY_STATE_STR(UP)
 	PHY_STATE_STR(RUNNING)
 	PHY_STATE_STR(NOLINK)
-	PHY_STATE_STR(FORCING)
 	PHY_STATE_STR(HALTED)
 	}
 
@@ -562,15 +561,8 @@ int phy_start_aneg(struct phy_device *phydev)
 	if (err < 0)
 		goto out_unlock;
 
-	if (phy_is_started(phydev)) {
-		if (phydev->autoneg == AUTONEG_ENABLE) {
-			err = phy_check_link_status(phydev);
-		} else {
-			phydev->state = PHY_FORCING;
-			phydev->link_timeout = PHY_FORCE_TIMEOUT;
-		}
-	}
-
+	if (phy_is_started(phydev))
+		err = phy_check_link_status(phydev);
 out_unlock:
 	mutex_unlock(&phydev->lock);
 
@@ -936,20 +928,6 @@ void phy_state_machine(struct work_struct *work)
 	case PHY_RUNNING:
 		err = phy_check_link_status(phydev);
 		break;
-	case PHY_FORCING:
-		err = genphy_update_link(phydev);
-		if (err)
-			break;
-
-		if (phydev->link) {
-			phydev->state = PHY_RUNNING;
-			phy_link_up(phydev);
-		} else {
-			if (0 == phydev->link_timeout--)
-				needs_aneg = true;
-			phy_link_down(phydev, false);
-		}
-		break;
 	case PHY_HALTED:
 		if (phydev->link) {
 			phydev->link = 0;
diff --git a/include/linux/phy.h b/include/linux/phy.h
index b2ffd82b1..e957f9aff 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -298,12 +298,6 @@ struct phy_device *mdiobus_scan(struct mii_bus *bus, int addr);
  * - irq or timer will set RUNNING if link comes back
  * - phy_stop moves to HALTED
  *
- * FORCING: PHY is being configured with forced settings
- * - if link is up, move to RUNNING
- * - If link is down, we drop to the next highest setting, and
- *   retry (FORCING) after a timeout
- * - phy_stop moves to HALTED
- *
  * RUNNING: PHY is currently up, running, and possibly sending
  * and/or receiving packets
  * - irq or timer will set NOLINK if link goes down
@@ -320,7 +314,6 @@ enum phy_state {
 	PHY_UP,
 	PHY_RUNNING,
 	PHY_NOLINK,
-	PHY_FORCING,
 };
 
 /**
@@ -348,8 +341,6 @@ struct phy_c45_device_ids {
  * loopback_enabled: Set true if this phy has been loopbacked successfully.
  * state: state of the PHY for management purposes
  * dev_flags: Device-specific flags used by the PHY driver.
- * link_timeout: The number of timer firings to wait before the
- * giving up on the current attempt at acquiring a link
  * irq: IRQ number of the PHY's interrupt (-1 if none)
  * phy_timer: The timer for handling the state machine
  * attached_dev: The attached enet driver's device instance ptr
@@ -417,8 +408,6 @@ struct phy_device {
 	/* Energy efficient ethernet modes which should be prohibited */
 	u32 eee_broken_modes;
 
-	int link_timeout;
-
 #ifdef CONFIG_LED_TRIGGER_PHY
 	struct phy_led_trigger *phy_led_triggers;
 	unsigned int phy_num_led_triggers;
-- 
2.21.0

Re: [PATCH net-next] net: phy: remove state PHY_FORCING

[David Miller]

From: Heiner Kallweit <hkallweit1@gmail.com>
Date: Tue, 4 Jun 2019 23:02:34 +0200

> In the early days of phylib we had a functionality that changed to the
> next lower speed in fixed mode if no link was established after a
> certain period of time. This functionality has been removed years ago,
> and state PHY_FORCING isn't needed any longer. Instead we can go from
> UP to RUNNING or NOLINK directly (same as in autoneg mode).
> 
> Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>

Applied.