netdev - Re: Bug#644281: linux-image-3.0.0-1-amd64: problem after changing mtu size on jme kernel module

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Date:	Fri, 07 Oct 2011 05:17:52 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	Guo-Fu Tseng <cooldavid@...ldavid.org>
Cc:	644281@...s.debian.org, kantacki <kantacki@...pl>,
	netdev <netdev@...r.kernel.org>
Subject: Re: Bug#644281: linux-image-3.0.0-1-amd64: problem after changing
 mtu size on jme kernel module

On Tue, 2011-10-04 at 20:13 +0200, kantacki wrote:
> Package: linux-2.6
> Version: 3.0.0-3
> Severity: important
> Tags: upstream
> 
> Hello,
> 
> When I try to execute:
> ifconfig eth0 mtu 4000 up
> or
> ifconfig eth0 mtu 7198 up
> my nic stops working and changing back to mtu 1500 does not help.
> To use my nic again I have to execute:
> rmmod jme
> modprome jme
> and the the command ifconfig eth0 mtu 1500 $IP up works and enables the network
> 
> My network card is Jmicron
[...]

Can you look into this, please?

It appears that jme_change_mtu() doesn't stop the RX path and doesn't
immediately reallocate RX buffers, and I think it should.  Maybe that's
not the problem though.

Ben.

-- 
Ben Hutchings
For every action, there is an equal and opposite criticism. - Harrison

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