| Message ID | 1490180524-28675-2-git-send-email-rogerq@ti.com |
|---|---|
| State | Superseded |
| Headers | show |
| Series | [v2,1/2] net: phy: Fix PHY AN done state machine for interrupt driven PHYs | expand |
On 23/03/17 11:52, Sergei Shtylyov wrote: > Hello! > > On 3/22/2017 2:02 PM, Roger Quadros wrote: > >> he ethernet link on an interrupt driven PHY was not coming up if the > > s/he/The/? > >> ethernet cable was plugged before the ethernet interface was brought up. > > Also, my spell checker trips on "ethernet", perhaps should be capitalized? Thanks. I'll fix both issues. > >> The PHY state machine seems to be stuck from RUNNING to AN state >> with no new interrupts from the PHY. So it doesn't know when the >> PHY Auto-negotiation has been completed and doesn't transition to RUNNING >> state with ANEG done thus netif_carrier_on() is never called. >> >> NOTE: genphy_config_aneg() will not restart PHY Auto-negotiation of >> advertisement parameters didn't change. >> >> Fix this by scheduling the PHY state machine in phy_start_aneg(). >> >> Fixes: 3c293f4e08b5 ("net: phy: Trigger state machine on state change and not polling.") >> Cc: stable <stable@vger.kernel.org> # v4.9+ >> Signed-off-by: Roger Quadros <rogerq@ti.com> > [...] > > MBR, Sergei > cheers, -roger
diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c index 1be69d8..49dedf8 100644 --- a/drivers/net/phy/phy.c +++ b/drivers/net/phy/phy.c @@ -630,6 +630,10 @@ int phy_start_aneg(struct phy_device *phydev) out_unlock: mutex_unlock(&phydev->lock); + if (!err && phy_interrupt_is_valid(phydev)) + queue_delayed_work(system_power_efficient_wq, + &phydev->state_queue, HZ); + return err; } EXPORT_SYMBOL(phy_start_aneg);
he ethernet link on an interrupt driven PHY was not coming up if the ethernet cable was plugged before the ethernet interface was brought up. The PHY state machine seems to be stuck from RUNNING to AN state with no new interrupts from the PHY. So it doesn't know when the PHY Auto-negotiation has been completed and doesn't transition to RUNNING state with ANEG done thus netif_carrier_on() is never called. NOTE: genphy_config_aneg() will not restart PHY Auto-negotiation of advertisement parameters didn't change. Fix this by scheduling the PHY state machine in phy_start_aneg(). Fixes: 3c293f4e08b5 ("net: phy: Trigger state machine on state change and not polling.") Cc: stable <stable@vger.kernel.org> # v4.9+ Signed-off-by: Roger Quadros <rogerq@ti.com> --- drivers/net/phy/phy.c | 4 ++++ 1 file changed, 4 insertions(+) -- 2.7.4