linux-kernel - Re: NAK new drivers without proper power management?

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Date:	Fri, 09 Feb 2007 19:25:34 -0500
From:	Jeff Garzik <jeff@...zik.org>
To:	nigel@...el.suspend2.net
CC:	Arjan van de Ven <arjan@...radead.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: NAK new drivers without proper power management?

Nigel Cunningham wrote:
> Hi.
> 
> On Fri, 2007-02-09 at 23:17 +0100, Arjan van de Ven wrote:
>> On Sat, 2007-02-10 at 08:57 +1100, Nigel Cunningham wrote:
>>> Hi.
>>>
>>> I don't think this is already done (feel free to correct me if I'm
>>> wrong)..
>>>
>>> Can we start to NAK new drivers that don't have proper power management
>>> implemented? There really is no excuse for writing a new driver and not
>>> putting .suspend and .resume methods in anymore, is there?
>>
>> to a large degree, a device driver that doesn't suspend is better than
>> no device driver at all, right?
> 
> I'm not sure it is. It only makes more work for everyone else: We have
> to help people figure out what causes their computer to fail to resume
> (which can take quite a while), then get them them complain to driver
> author, and the driver author has to submit patches to fix it.
> 
> All of this is avoided if they'll just do it right in the first place.

A lot of a lot of things could have been avoided, if they just did it 
right the first time.

I think it's more valuable to users to get a basic network driver that 
pings or a basic ATA driver that reads/writes, than peripheral issues 
like suspend/resume.

Certainly we should ask for it, but it shouldn't be a merge-stopper.

	Jeff



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