netdev - [PATCH v2 net-next] net: phy: improve handling delayed work

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Date:   Fri, 28 Sep 2018 08:51:09 +0200
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 v2 net-next] net: phy: improve handling delayed work

Using mod_delayed_work() allows to simplify handling delayed work and
removes the need for the sync parameter in phy_trigger_machine().
Also introduce a helper phy_queue_state_machine() to encapsulate the
low-level delayed work calls. No functional change intended.

Signed-off-by: Heiner Kallweit <hkallweit1@...il.com>
---
v2:
- removed inline annotation from phy_queue_state_machine()
---
 drivers/net/phy/phy.c | 29 +++++++++++++++--------------
 include/linux/phy.h   |  2 +-
 2 files changed, 16 insertions(+), 15 deletions(-)

diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index a1f8e4816..14509a890 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -537,7 +537,7 @@ static int phy_start_aneg_priv(struct phy_device *phydev, bool sync)
 	mutex_unlock(&phydev->lock);
 
 	if (trigger)
-		phy_trigger_machine(phydev, sync);
+		phy_trigger_machine(phydev);
 
 	return err;
 }
@@ -635,6 +635,13 @@ int phy_speed_up(struct phy_device *phydev)
 }
 EXPORT_SYMBOL_GPL(phy_speed_up);
 
+static void phy_queue_state_machine(struct phy_device *phydev,
+				    unsigned int secs)
+{
+	mod_delayed_work(system_power_efficient_wq, &phydev->state_queue,
+			 secs * HZ);
+}
+
 /**
  * phy_start_machine - start PHY state machine tracking
  * @phydev: the phy_device struct
@@ -647,7 +654,7 @@ EXPORT_SYMBOL_GPL(phy_speed_up);
  */
 void phy_start_machine(struct phy_device *phydev)
 {
-	queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, HZ);
+	phy_queue_state_machine(phydev, 1);
 }
 EXPORT_SYMBOL_GPL(phy_start_machine);
 
@@ -655,19 +662,14 @@ EXPORT_SYMBOL_GPL(phy_start_machine);
  * phy_trigger_machine - trigger the state machine to run
  *
  * @phydev: the phy_device struct
- * @sync: indicate whether we should wait for the workqueue cancelation
  *
  * Description: There has been a change in state which requires that the
  *   state machine runs.
  */
 
-void phy_trigger_machine(struct phy_device *phydev, bool sync)
+void phy_trigger_machine(struct phy_device *phydev)
 {
-	if (sync)
-		cancel_delayed_work_sync(&phydev->state_queue);
-	else
-		cancel_delayed_work(&phydev->state_queue);
-	queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, 0);
+	phy_queue_state_machine(phydev, 0);
 }
 
 /**
@@ -703,7 +705,7 @@ static void phy_error(struct phy_device *phydev)
 	phydev->state = PHY_HALTED;
 	mutex_unlock(&phydev->lock);
 
-	phy_trigger_machine(phydev, false);
+	phy_trigger_machine(phydev);
 }
 
 /**
@@ -745,7 +747,7 @@ static irqreturn_t phy_change(struct phy_device *phydev)
 	mutex_unlock(&phydev->lock);
 
 	/* reschedule state queue work to run as soon as possible */
-	phy_trigger_machine(phydev, true);
+	phy_trigger_machine(phydev);
 
 	if (phy_interrupt_is_valid(phydev) && phy_clear_interrupt(phydev))
 		goto phy_err;
@@ -911,7 +913,7 @@ void phy_start(struct phy_device *phydev)
 	}
 	mutex_unlock(&phydev->lock);
 
-	phy_trigger_machine(phydev, true);
+	phy_trigger_machine(phydev);
 }
 EXPORT_SYMBOL(phy_start);
 
@@ -1130,8 +1132,7 @@ void phy_state_machine(struct work_struct *work)
 	 * called from phy_disconnect() synchronously.
 	 */
 	if (phy_polling_mode(phydev) && old_state != PHY_HALTED)
-		queue_delayed_work(system_power_efficient_wq, &phydev->state_queue,
-				   PHY_STATE_TIME * HZ);
+		phy_queue_state_machine(phydev, PHY_STATE_TIME);
 }
 
 /**
diff --git a/include/linux/phy.h b/include/linux/phy.h
index 192a1fa0c..15bd074ef 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -1039,7 +1039,7 @@ void phy_change_work(struct work_struct *work);
 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);
+void phy_trigger_machine(struct phy_device *phydev);
 int phy_ethtool_sset(struct phy_device *phydev, struct ethtool_cmd *cmd);
 void phy_ethtool_ksettings_get(struct phy_device *phydev,
 			       struct ethtool_link_ksettings *cmd);
-- 
2.19.0