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net: phy: core: remove now uneeded disabling of interrupts 

After commits c974bdbc3e "net: phy: Use threaded IRQ, to allow IRQ from
sleeping devices" and 664fcf123a "net: phy: Threaded interrupts allow
some simplification" all relevant code pieces run in process context
anyway and I don't think we need the disabling of interrupts any longer.

Interestingly enough, latter commit already removed the comment
explaining why interrupts need to be temporarily disabled.

On my system phy interrupt mode works fine with this patch.
However I may miss something, especially in the context of shared phy
interrupts, therefore I'd appreciate if more people could test this.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Heiner Kallweit 2017-11-30 23:55:15 +01:00 committed by David S. Miller
parent c6d3c96f8d
commit a6d1642dab
2 changed files with 2 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
drivers/net/phy/phy.c
View File

@ -632,9 +632,6 @@ static irqreturn_t phy_interrupt(int irq, void *phy_dat)
if (PHY_HALTED == phydev->state)
return IRQ_NONE; /* It can't be ours. */
disable_irq_nosync(irq);
atomic_inc(&phydev->irq_disable);
phy_change(phydev);
return IRQ_HANDLED;
@ -692,7 +689,6 @@ phy_err:
*/
int phy_start_interrupts(struct phy_device *phydev)
{
atomic_set(&phydev->irq_disable, 0);
if (request_threaded_irq(phydev->irq, NULL, phy_interrupt,
IRQF_ONESHOT | IRQF_SHARED,
phydev_name(phydev), phydev) < 0) {
@ -719,13 +715,6 @@ int phy_stop_interrupts(struct phy_device *phydev)
free_irq(phydev->irq, phydev);
/* If work indeed has been cancelled, disable_irq() will have
* been left unbalanced from phy_interrupt() and enable_irq()
* has to be called so that other devices on the line work.
*/
while (atomic_dec_return(&phydev->irq_disable) >= 0)
enable_irq(phydev->irq);
return err;
}
EXPORT_SYMBOL(phy_stop_interrupts);
@ -739,7 +728,7 @@ void phy_change(struct phy_device *phydev)
if (phy_interrupt_is_valid(phydev)) {
if (phydev->drv->did_interrupt &&
!phydev->drv->did_interrupt(phydev))
goto ignore;
return;
if (phy_disable_interrupts(phydev))
goto phy_err;
@ -751,27 +740,16 @@ void phy_change(struct phy_device *phydev)
mutex_unlock(&phydev->lock);
if (phy_interrupt_is_valid(phydev)) {
atomic_dec(&phydev->irq_disable);
enable_irq(phydev->irq);
/* Reenable interrupts */
if (PHY_HALTED != phydev->state &&
phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED))
goto irq_enable_err;
goto phy_err;
}
/* reschedule state queue work to run as soon as possible */
phy_trigger_machine(phydev, true);
return;
ignore:
atomic_dec(&phydev->irq_disable);
enable_irq(phydev->irq);
return;
irq_enable_err:
disable_irq(phydev->irq);
atomic_inc(&phydev->irq_disable);
phy_err:
phy_error(phydev);
}

1
include/linux/phy.h
View File

@ -468,7 +468,6 @@ struct phy_device {
/* Interrupt and Polling infrastructure */
struct work_struct phy_queue;
struct delayed_work state_queue;
atomic_t irq_disable;
struct mutex lock;