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>

1 files changed, 5 insertions, 4 deletions

diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index c14f14741b3f..984c0b5ba174 100644
--- 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,