Re: drivers/net/phy/phy.c issue

Guenter Roeck
2012-02-08T19:32:09Z

Copying netdev.

On Wed, 2012-02-08 at 09:31 -0500, Frans Meulenbroeks wrote:
> Hi
>
> I found an issue with drivers/net/phy/phy.c
> As I could not identify a maintainer for this file I decided to mail
> it to the above addressees.
> Apologies upfront if it is inappropriate.
>
> The issue:
>
> My network interface was configured as 10Mbit, full duplex, autonegotiate off.
> If the cable is unplugged after 10 seconds or so the interface drops
> to half duplex and the message:
> Trying 10/HALF
> is printed. This message comes (if I am correct from the function
> phy_force_reduction in drivers/net/phy/phy.c
>
> Maybe this is still ok, however if I reconnect my network cable the
> interface remains configured as 10 Mbit, half duplex.
> I had expected/assumed that it would go back to 10 Mbit, full duplex.
>
> If I try the same with a 1Gbit full duplex link with autonegotiate on,
> the link also drops to half duplex whenever the cable is
> disconnected. However reconnecting the cable then brings the interface
> back to full duplex again.
>
> Not sure what is wrong (if the interface should not be dropped to half
> or get back to full) and even less an idea how to fix it,
> but wanted to report it anyway, in the hope someone can shed a light
> on this and/or fix it.
>
What is your kernel version ? No idea if it makes a difference, but I
strongly suspect people will need to know.

Guenter

> Best regards, Frans.
>
> PS: I'm not on lkml (way too much mails for me), so please keep me on Cc