Messages in this thread | | | Date | Wed, 08 Feb 2012 15:05:48 -0600 | From | guenter@roeck-us ... | Subject | Re: drivers/net/phy/phy.c issue |
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Quoting "Frans Meulenbroeks" <fransmeulenbroeks@gmail.com>:
> 2012/2/8 Guenter Roeck <guenter.roeck@ericsson.com>: >> 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. > > Oops, sorry for the incomplete info. > This was detected in 2.6.38, but the current git head of phy.c differs > only on a few places that (at least according to my judgement) are not > related. > Apologies, but I cannot test on a git head kernel. > > And wrt the question of Andy in the subsequent reply. > > Hw is a Freescale MPC8313. This is a Gianfar. Is that the info you wanted? > This is the MAC. Andy was asking for the PHY chip.
Guenter
> BTW what is the desired behaviour? Should I drop to half duplex? Or > should I get back to full if I reconnect. > > Best regards, Frans > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > > >
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