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Subject: Re: aic7xxx sets CDR offline, how to reset?
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: James Bottomley <James.Bottomley@steeleye.com>
Cc: Patrick Mansfield <patmans@us.ibm.com>,
       "Justin T. Gibbs" <gibbs@scsiguy.com>, linux-kernel@vger.kernel.org,
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Date: 04 Sep 2002 00:26:45 +0100
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On Tue, 2002-09-03 at 23:02, James Bottomley wrote:
> > And what happens if one command gets some sort of check condition
> > (like medium error, or aborted command) that causes a retry? Will IO's
> > still be correctly ordered? 
> 
> Retries get eliminated.  It should be up to the upper layers (sd or beyond) to 
> say whether a retry is done.  Since, as you point out, retries automatically 
> violate any barrier, it is probably up to the block layer to judge what should 
> be done about the problem.

Then we need to give the block layer a lot more information about what
kind of a problem occurred

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