netdev - Re: [PATCH 1/2] smsc95xx: add module parameter to turn off NIC status leds

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Date:	Thu, 9 Feb 2012 10:38:15 +0100 (CET)
From:	Peter Meerwald <pmeerw@...erw.net>
To:	David Miller <davem@...emloft.net>
cc:	netdev@...r.kernel.org
Subject: Re: [PATCH 1/2] smsc95xx: add module parameter to turn off NIC status
 leds

Hello David,

> > add module parameter to allow to turn off NIC status leds (link, 
> > speed, activity); blinking LEDs are annoying outside the server room :)

> No.  Create a generic mechanism, perhaps via ethtool, for users to
> configure something like this.
 
> Otherwise the next driver that wants to provide this kind of knob
> will add yet another module parameter with yet another name, and
> this kind of ad-hoc set of interfaces absolutely sucks for users.

I am not sure how many NICs provide that functionality, so a specific knob 
seemed reasonable

I had a look at ethtool, there are ETHTOOL_GFLAGS and ETHTOOL_GPFLAGS (and 
the respective setters) which could be used -- but noone seems to use 
those for any purpose 

a private flag for LED control (via ETHTOOL_GPFLAGS) is pretty much the 
same knob as a module parameter, so not an option

so the remaining option is to add something like ETHTOOL_GLEDCONTROL / 
ETHTOOL_SLEDCONTROL with likely only one user (smsc95xx)

regards, p.

-- 

Peter Meerwald
+43-664-2444418 (mobile)
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