[PATCH v3 net-next 0/3] net: phy: improve stopping PHY

[PATCH v3 net-next 0/3] net: phy: improve stopping PHY

[Heiner Kallweit]

This patchset improves and simplifies stopping the PHY.

Heiner Kallweit (3):
  net: phy: stop PHY if needed when entering phy_disconnect
  net: phy: ensure phylib state machine is stopped after calling phy_stop
  net: phy: remove phy_stop_interrupts

v2:
- break down the patch to a patchset
v3:
- don't warn if driver didn't call phy_stop before phy_disconnect

 drivers/net/phy/phy.c        | 18 +-----------------
 drivers/net/phy/phy_device.c |  7 ++++---
 include/linux/phy.h          |  1 -
 3 files changed, 5 insertions(+), 21 deletions(-)

-- 
2.20.1

[PATCH v3 net-next 1/3] net: phy: stop PHY if needed when entering phy_disconnect

[Heiner Kallweit]

Stop PHY if needed when entering phy_disconnect. This allows drivers
that don't need a separate call to phy_stop() to omit this call.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
---
 drivers/net/phy/phy_device.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index b5f5cda4c..9e588f03e 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -999,6 +999,9 @@ EXPORT_SYMBOL(phy_connect);
  */
 void phy_disconnect(struct phy_device *phydev)
 {
+	if (phy_is_started(phydev))
+		phy_stop(phydev);
+
 	if (phydev->irq > 0)
 		phy_stop_interrupts(phydev);
 
-- 
2.20.1

[PATCH v3 net-next 2/3] net: phy: ensure phylib state machine is stopped after calling phy_stop

[Heiner Kallweit]

The call to the phylib state machine in phy_stop() just ensures that
the state machine isn't re-triggered, but a state machine call may
be scheduled already. So lets's call phy_stop_machine().
This also allows to get rid of the call to phy_stop_machine() in
phy_disconnect().

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
---
 drivers/net/phy/phy.c        | 1 +
 drivers/net/phy/phy_device.c | 2 --
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index 2ffe08537..96e9ec252 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -853,6 +853,7 @@ void phy_stop(struct phy_device *phydev)
 	mutex_unlock(&phydev->lock);
 
 	phy_state_machine(&phydev->state_queue.work);
+	phy_stop_machine(phydev);
 
 	/* Cannot call flush_scheduled_work() here as desired because
 	 * of rtnl_lock(), but PHY_HALTED shall guarantee irq handler
diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index 9e588f03e..839e3247f 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -1005,8 +1005,6 @@ void phy_disconnect(struct phy_device *phydev)
 	if (phydev->irq > 0)
 		phy_stop_interrupts(phydev);
 
-	phy_stop_machine(phydev);
-
 	phydev->adjust_link = NULL;
 
 	phy_detach(phydev);
-- 
2.20.1

[PATCH v3 net-next 3/3] net: phy: remove phy_stop_interrupts

[Heiner Kallweit]

Interrupts have been disabled in phy_stop() already. So we can remove
phy_stop_interrupts() and free the interrupt in phy_disconnect()
directly.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
---
 drivers/net/phy/phy.c        | 17 -----------------
 drivers/net/phy/phy_device.c |  4 ++--
 include/linux/phy.h          |  1 -
 3 files changed, 2 insertions(+), 20 deletions(-)

diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index 96e9ec252..745a705a5 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -813,23 +813,6 @@ int phy_start_interrupts(struct phy_device *phydev)
 }
 EXPORT_SYMBOL(phy_start_interrupts);
 
-/**
- * phy_stop_interrupts - disable interrupts from a PHY device
- * @phydev: target phy_device struct
- */
-int phy_stop_interrupts(struct phy_device *phydev)
-{
-	int err = phy_disable_interrupts(phydev);
-
-	if (err)
-		phy_error(phydev);
-
-	free_irq(phydev->irq, phydev);
-
-	return err;
-}
-EXPORT_SYMBOL(phy_stop_interrupts);
-
 /**
  * phy_stop - Bring down the PHY link, and stop checking the status
  * @phydev: target phy_device struct
diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index 839e3247f..4f61ebf84 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -1002,8 +1002,8 @@ void phy_disconnect(struct phy_device *phydev)
 	if (phy_is_started(phydev))
 		phy_stop(phydev);
 
-	if (phydev->irq > 0)
-		phy_stop_interrupts(phydev);
+	if (phy_interrupt_is_valid(phydev))
+		free_irq(phydev->irq, phydev);
 
 	phydev->adjust_link = NULL;
 
diff --git a/include/linux/phy.h b/include/linux/phy.h
index 00b0533de..1fa7c367b 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -951,7 +951,6 @@ int phy_aneg_done(struct phy_device *phydev);
 int phy_speed_down(struct phy_device *phydev, bool sync);
 int phy_speed_up(struct phy_device *phydev);
 
-int phy_stop_interrupts(struct phy_device *phydev);
 int phy_restart_aneg(struct phy_device *phydev);
 int phy_reset_after_clk_enable(struct phy_device *phydev);
 
-- 
2.20.1

Re: [PATCH v3 net-next 0/3] net: phy: improve stopping PHY

[David Miller]

From: Heiner Kallweit <hkallweit1@gmail.com>
Date: Thu, 17 Jan 2019 20:06:46 +0100

> This patchset improves and simplifies stopping the PHY.

Series applied, thanks.