Re: [PATCH] mlx4: set carrier off after register netdev

On Fri, 5 Oct 2012, Ben Hutchings wrote:

On Fri, 2012-10-05 at 11:28 -0700, Min Zhang wrote:

quoted

ifconfig mlx4_en port reported RUNNING even though the link was down.

mlx4_en_init_netdev didn't initialize the dev operstate properly so
the operstate stayed as default IF_OPER_UNKNOWN, then ifconfig treated
the UNKNOWN as RUNNING state for backward compatiblity per RFC2863.

The fix calls netif_carrier_off which is supposed to set operstate
after register_netdev. Calling it before register_netdev has no effect
since the dev->state is still NETREG_UNINITIALIZED

Tested by removing the physical link signal to the mellanox 10G port,
modprobe mlx4_en, then ifconfig up. Verify there is no RUNNING status.

[...]

This was supposed to be fixed by:

commit 8f4cccbbd92f2ad0ddbbc498ef7cee2a1c3defe9
Author: Ben Hutchings [off-list ref]
Date:   Mon Aug 20 22:16:51 2012 +0100

    net: Set device operstate at registration time

Does that not work for mlx4_en, for some reason?

Ben.

-- 
Ben Hutchings, Staff Engineer, Solarflare
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.

Indeed, commit 8f4cccbbd92f2ad0ddbbc498ef7cee2a1c3defe9 does fix the issue 
in mlx4. I didn't have the newest net/core. Therefore ignore my mlx4 fix.