From: Andrew Morton <akpm@linux-foundation.org>
To: netdev@vger.kernel.org
Cc: bugzilla-daemon@bugzilla.kernel.org,
bugme-daemon@bugzilla.kernel.org,
Haavard Skinnemoen <hskinnemoen@atmel.com>,
dannybaumann@web.de
Subject: Re: [Bugme-new] [Bug 15147] New: phylib: no re-negotiation after link partner abilities changed
Date: Wed, 27 Jan 2010 16:48:33 -0800 [thread overview]
Message-ID: <20100127164833.f0c96ded.akpm@linux-foundation.org> (raw)
In-Reply-To: <bug-15147-10286@http.bugzilla.kernel.org/>
(switched to email. Please respond via emailed reply-to-all, not via the
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On Tue, 26 Jan 2010 16:24:35 GMT
bugzilla-daemon@bugzilla.kernel.org wrote:
> http://bugzilla.kernel.org/show_bug.cgi?id=15147
>
> Summary: phylib: no re-negotiation after link partner abilities
> changed
> Product: Drivers
> Version: 2.5
> Platform: All
> OS/Version: Linux
> Tree: Mainline
> Status: NEW
> Severity: normal
> Priority: P1
> Component: Network
> AssignedTo: drivers_network@kernel-bugs.osdl.org
> ReportedBy: dannybaumann@web.de
> Regression: No
>
>
> E.g. with the macb driver, which uses phylib, there is no link anymore when the
> link partner changes its abilities. This is because no autonegotiation is done
> again on link changes and hence the LPA register is not updated.
>
> Steps for reproduction:
> - Connect a 10/100 device to a 10/100 switch, configure switch port to 100Full
> - Enable interface, link will be present
> - Configure device to 10Full, link will be lost
> - Configure switch to 10Full
>
> Result:
> Link should be present at that point, but isn't ... debug messages in
> genphy_read_status show that lpa is still at 0x4101 (100Full).
>
> Note that all that is on an AT91SAM9G20 board (hence macb driver) with a
> Dawicom 9161 PHY connected to its Ethernet port, but AFAICT all phylib enabled
> drivers should suffer from this.
>
>From the above it appears that this is a regression.
Can you tell us which kernel version(s) were OK and which are not?
Thanks.
next parent reply other threads:[~2010-01-28 0:48 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <bug-15147-10286@http.bugzilla.kernel.org/>
2010-01-28 0:48 ` Andrew Morton [this message]
2010-01-28 7:40 ` [Bugme-new] [Bug 15147] New: phylib: no re-negotiation after link partner abilities changed Danny Baumann
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