netdev - RE: [net-next-2.6 RFC PATCH] ethtool: allow custom interval for physical identification

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Message-ID: <8DD2590731AB5D4C9DBF71A877482A90018A2A30A9@orsmsx509.amr.corp.intel.com>
Date:	Mon, 11 Apr 2011 16:30:43 -0700
From:	"Allan, Bruce W" <bruce.w.allan@...el.com>
To:	Stephen Hemminger <shemminger@...tta.com>
CC:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: RE: [net-next-2.6 RFC PATCH] ethtool: allow custom interval for
 physical identification

>-----Original Message-----
>From: Stephen Hemminger [mailto:shemminger@...tta.com]
>Sent: Monday, April 11, 2011 4:26 PM
>To: Allan, Bruce W
>Cc: netdev@...r.kernel.org
>Subject: Re: [net-next-2.6 RFC PATCH] ethtool: allow custom interval for
>physical identification
>
>On Mon, 11 Apr 2011 16:16:35 -0700
>Bruce Allan <bruce.w.allan@...el.com> wrote:
>
>> When physical identification of an adapter is done by toggling the
>> mechanism on and off through software utilizing the .set_phys_id operation,
>> it is done with a fixed duration for both on and off states.  Some drivers
>> may want to set a custom duration for the on/off intervals.  This patch
>> changes the API so the return code from the driver's entry point can
>> specify the interval duration as a positive number; -EINVAL is still
>> allowed in order to use the default single on/off interval per second.
>>
>> Signed-off-by: Bruce Allan <bruce.w.allan@...el.com>
>
>IMHO this is -EOVERKILL.

I realize it does seem like that, but we have OEMs that expect the LEDs to
blink a certain way during a physical identification (twice a second vs.
once a second per the original .set_phys_id patchset).  There may be other
drivers from different hardware vendors that have similar but different
requirements.

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