Merge branch 'net-phy-improve-starting-PHY'

Heiner Kallweit says:

====================
net: phy: improve starting PHY

This patch series improves few aspects of starting the PHY.

v2:
- improve a warning in patch 4
v3:
- extend commit message for patch 2
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2019-01-24 22:15:15 -08:00
commit 2ab64da68c
4 changed files with 40 additions and 42 deletions

View File

@ -785,28 +785,27 @@ static int phy_enable_interrupts(struct phy_device *phydev)
}
/**
* phy_start_interrupts - request and enable interrupts for a PHY device
* phy_request_interrupt - request interrupt for a PHY device
* @phydev: target phy_device struct
*
* Description: Request the interrupt for the given PHY.
* If this fails, then we set irq to PHY_POLL.
* Otherwise, we enable the interrupts in the PHY.
* This should only be called with a valid IRQ number.
* Returns 0 on success or < 0 on error.
*/
int phy_start_interrupts(struct phy_device *phydev)
void phy_request_interrupt(struct phy_device *phydev)
{
if (request_threaded_irq(phydev->irq, NULL, phy_interrupt,
IRQF_ONESHOT | IRQF_SHARED,
phydev_name(phydev), phydev) < 0) {
phydev_warn(phydev, "Can't get IRQ %d\n", phydev->irq);
phydev->irq = PHY_POLL;
return 0;
}
int err;
return phy_enable_interrupts(phydev);
err = request_threaded_irq(phydev->irq, NULL, phy_interrupt,
IRQF_ONESHOT | IRQF_SHARED,
phydev_name(phydev), phydev);
if (err) {
phydev_warn(phydev, "Error %d requesting IRQ %d, falling back to polling\n",
err, phydev->irq);
phydev->irq = PHY_POLL;
}
}
EXPORT_SYMBOL(phy_start_interrupts);
EXPORT_SYMBOL(phy_request_interrupt);
/**
* phy_stop - Bring down the PHY link, and stop checking the status
@ -852,33 +851,34 @@ EXPORT_SYMBOL(phy_stop);
*/
void phy_start(struct phy_device *phydev)
{
int err = 0;
int err;
mutex_lock(&phydev->lock);
switch (phydev->state) {
case PHY_READY:
phydev->state = PHY_UP;
break;
case PHY_HALTED:
/* if phy was suspended, bring the physical link up again */
__phy_resume(phydev);
/* make sure interrupts are re-enabled for the PHY */
if (phy_interrupt_is_valid(phydev)) {
err = phy_enable_interrupts(phydev);
if (err < 0)
break;
}
phydev->state = PHY_RESUMING;
break;
default:
break;
if (phydev->state != PHY_READY && phydev->state != PHY_HALTED) {
WARN(1, "called from state %s\n",
phy_state_to_str(phydev->state));
goto out;
}
mutex_unlock(&phydev->lock);
phy_trigger_machine(phydev);
/* if phy was suspended, bring the physical link up again */
__phy_resume(phydev);
/* make sure interrupts are enabled for the PHY */
if (phy_interrupt_is_valid(phydev)) {
err = phy_enable_interrupts(phydev);
if (err < 0)
goto out;
}
if (phydev->state == PHY_READY)
phydev->state = PHY_UP;
else
phydev->state = PHY_RESUMING;
phy_start_machine(phydev);
out:
mutex_unlock(&phydev->lock);
}
EXPORT_SYMBOL(phy_start);

View File

@ -951,9 +951,8 @@ int phy_connect_direct(struct net_device *dev, struct phy_device *phydev,
return rc;
phy_prepare_link(phydev, handler);
phy_start_machine(phydev);
if (phydev->irq > 0)
phy_start_interrupts(phydev);
if (phy_interrupt_is_valid(phydev))
phy_request_interrupt(phydev);
return 0;
}

View File

@ -676,9 +676,8 @@ static int phylink_bringup_phy(struct phylink *pl, struct phy_device *phy)
__ETHTOOL_LINK_MODE_MASK_NBITS, pl->supported,
__ETHTOOL_LINK_MODE_MASK_NBITS, phy->advertising);
phy_start_machine(phy);
if (phy->irq > 0)
phy_start_interrupts(phy);
if (phy_interrupt_is_valid(phy))
phy_request_interrupt(phy);
return 0;
}

View File

@ -1047,7 +1047,7 @@ void phy_ethtool_ksettings_get(struct phy_device *phydev,
int phy_ethtool_ksettings_set(struct phy_device *phydev,
const struct ethtool_link_ksettings *cmd);
int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd);
int phy_start_interrupts(struct phy_device *phydev);
void phy_request_interrupt(struct phy_device *phydev);
void phy_print_status(struct phy_device *phydev);
int phy_set_max_speed(struct phy_device *phydev, u32 max_speed);
void phy_remove_link_mode(struct phy_device *phydev, u32 link_mode);