linux-kernel - Re: [PATCH] driver core: remove polling for driver_probe

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Message-ID: <d82e647a0901300251sf78f8dap9a319263f3f670f7@mail.gmail.com>
Date:	Fri, 30 Jan 2009 18:51:51 +0800
From:	Ming Lei <tom.leiming@...il.com>
To:	Cornelia Huck <cornelia.huck@...ibm.com>
Cc:	kay.sievers@...y.org, greg@...ah.com, arjan@...radead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] driver core: remove polling for driver_probe_done(v2)

2009/1/30 Cornelia Huck <cornelia.huck@...ibm.com>:
> On Fri, 30 Jan 2009 18:17:36 +0800,
> Ming Lei <tom.leiming@...il.com> wrote:
>
>> If probing done does not mean the device is available, this patch should be
>> ignored or fixed further.
>>
>> But polling is really not good, is there a approach to avoid the polling for
>> appearence of the root device?
>
> I think the parts of your patch that replace polling for
> driver_probe_done() with waiting on the waitqueue are fine. The
> problematic part is the rootwait special case, where polling seems
> unavoidable afaics.

Yes.

Maybe we should keep the polling for root device. And I will resend a
patch ,which only replace the driver_probe_done().

Thanks.

>



-- 
Lei Ming
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