PHYLIB: queue work on system_power_efficient_wq

Phylib uses workqueues for multiple purposes. There is no real dependency of
scheduling these on the cpu which scheduled them.

On a idle system, it is observed that and idle cpu wakes up many times just to
service this work. It would be better if we can schedule it on a cpu which the
scheduler believes to be the most appropriate one.

This patch replaces system_wq with system_power_efficient_wq for PHYLIB.

Cc: David S. Miller <davem@davemloft.net>
Cc: netdev@vger.kernel.org
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Tejun Heo <tj@kernel.org>
(cherry picked from commit bbb47bdeae756f04b896b55b51f230f3eb21f207)
Signed-off-by: Mark Brown <broonie@linaro.org>

diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index 38f0b312ff85e339bc742c8472ef244bb9c50a40..663d2d0448b759117896b4f765261ec02f7e6f9c 100644 (file)
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -439,7 +439,7 @@ void phy_start_machine(struct phy_device *phydev,
 {
        phydev->adjust_state = handler;
 
-       schedule_delayed_work(&phydev->state_queue, HZ);
+       queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, HZ);
 }
 
 /**
@@ -500,7 +500,7 @@ static irqreturn_t phy_interrupt(int irq, void *phy_dat)
        disable_irq_nosync(irq);
        atomic_inc(&phydev->irq_disable);
 
-       schedule_work(&phydev->phy_queue);
+       queue_work(system_power_efficient_wq, &phydev->phy_queue);
 
        return IRQ_HANDLED;
 }
@@ -655,7 +655,7 @@ static void phy_change(struct work_struct *work)
 
        /* reschedule state queue work to run as soon as possible */
        cancel_delayed_work_sync(&phydev->state_queue);
-       schedule_delayed_work(&phydev->state_queue, 0);
+       queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, 0);
 
        return;
 
@@ -918,7 +918,8 @@ void phy_state_machine(struct work_struct *work)
        if (err < 0)
                phy_error(phydev);
 
-       schedule_delayed_work(&phydev->state_queue, PHY_STATE_TIME * HZ);
+       queue_delayed_work(system_power_efficient_wq, &phydev->state_queue,
+                       PHY_STATE_TIME * HZ);
 }
 
 static inline void mmd_phy_indirect(struct mii_bus *bus, int prtad, int devad,