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Subject: Re: Driver timeout
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: "linux-os (Dick Johnson)" <linux-os@analogic.com>
Cc: Linux kernel <linux-kernel@vger.kernel.org>,
       "Larson, Greg" <GLarson@analogic.com>
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Date: Fri, 28 Jul 2006 17:55:32 +0100
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Ar Gwe, 2006-07-28 am 11:54 -0400, ysgrifennodd linux-os (Dick Johnson):
> 
> Hello list,
> What is the correct error code for a driver to return if
> the requested operation timed out?

If the operation is blocking then 
	ETIMEDOUT - if a timeout occurred
	
possibly also
	ETIME	  - if a timer of some kind expired

If you know why it timed out you may want to return that instead to
provide more information (eg the net code returns things like 'Host
down')