Re: [PATCH] net: smsc911x: If PHY doesn't have an interrupt then POLL

[Sergei Shtylyov]

On 06/14/2016 11:59 PM, Jeremy Linton wrote:

If the interrupt configuration isn't set and we are using the

    It's never set, judging by the driver code.

internal phy, then we need to poll the phy to reliably detect
phy state changes.

    What address your internal PHY is at? Mine is at 1, and things seem
to work reliably after probing:

SMSC LAN8700 18000000.etherne:01: attached PHY driver [SMSC LAN8700]
(mii_bus:phy_addr=18000000.etherne:01, irq=-1)

    Looks like your phy ends up polling (-1==IRQ_POLL)...

   Yeah. You didn't answer my question though...

    I'm using the device tree on my board.

    This was DT as well with a recent fedora/NetworkManager. It actually seems
to be timing related to how fast the device gets configured after the initial
phy probe. There is something like a 1 second window or so where it will work,
but if network manager takes longer than that, the link state drops and cannot
be brought back up unless the cable is pulled, replugged while the netdevice
is being restarted.

   1 second is the PHY poll interval IIRC.

MBR, Sergei