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net: phy: resume phydev when going to RESUMING 

With commit be9dad1f9f ("net: phy: suspend phydev when going
to HALTED"), an unused PHY device will be put in a low-power mode
using BMCR_PDOWN. Some Ethernet drivers might be calling phy_start()
and phy_stop() from ndo_open and ndo_close() respectively, while
calling phy_connect() and phy_disconnect() from probe and remove.
In such a case, the PHY will be powered down during the phy_stop()
call, but will fail to be powered up in phy_start().
This patch fixes this scenario.

Signed-off-by: Jiancheng Xue <xuejiancheng@huawei.com>
Signed-off-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Zhangfei Gao 2014-05-15 13:35:34 +08:00 committed by David S. Miller
parent 0c2e3fa958
commit 6e14a5eeb1
1 changed files with 9 additions and 7 deletions
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16
drivers/net/phy/phy.c
View File

@ -715,7 +715,7 @@ void phy_state_machine(struct work_struct *work)
struct delayed_work *dwork = to_delayed_work(work);
struct phy_device *phydev =
container_of(dwork, struct phy_device, state_queue);
int needs_aneg = 0, do_suspend = 0;
bool needs_aneg = false, do_suspend = false, do_resume = false;
int err = 0;
mutex_lock(&phydev->lock);
@ -727,7 +727,7 @@ void phy_state_machine(struct work_struct *work)
case PHY_PENDING:
break;
case PHY_UP:
needs_aneg = 1;
needs_aneg = true;
phydev->link_timeout = PHY_AN_TIMEOUT;
@ -757,7 +757,7 @@ void phy_state_machine(struct work_struct *work)
phydev->adjust_link(phydev->attached_dev);
} else if (0 == phydev->link_timeout--)
needs_aneg = 1;
needs_aneg = true;
break;
case PHY_NOLINK:
err = phy_read_status(phydev);
@ -791,7 +791,7 @@ void phy_state_machine(struct work_struct *work)
netif_carrier_on(phydev->attached_dev);
} else {
if (0 == phydev->link_timeout--)
needs_aneg = 1;
needs_aneg = true;
}
phydev->adjust_link(phydev->attached_dev);
@ -827,7 +827,7 @@ void phy_state_machine(struct work_struct *work)
phydev->link = 0;
netif_carrier_off(phydev->attached_dev);
phydev->adjust_link(phydev->attached_dev);
do_suspend = 1;
do_suspend = true;
}
break;
case PHY_RESUMING:
@ -876,6 +876,7 @@ void phy_state_machine(struct work_struct *work)
}
phydev->adjust_link(phydev->attached_dev);
}
do_resume = true;
break;
}
@ -883,9 +884,10 @@ void phy_state_machine(struct work_struct *work)
if (needs_aneg)
err = phy_start_aneg(phydev);
if (do_suspend)
else if (do_suspend)
phy_suspend(phydev);
else if (do_resume)
phy_resume(phydev);
if (err < 0)
phy_error(phydev);