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Date: Tue, 25 May 2010 09:25:16 -0700
From: Matthew Jacob <mj@feral.com>
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Subject: Re: patches for CAM SCSI probing, etc.
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Part of the reason I went the way you had done for ATA is to try and 
guarantee one and one only probe action at a time per nexus.


> you are slightly changing semantics of device probe. Previously, probe
> call means warranty that device will be probed from the beginning after
> the moment of request. It is very important for ATA, as probe function
> also initializes device, that is mandatory if probe is called as result
> of device reset. SCSI devices probably don't need that initialization,
> but what if probe was called due to inquiry change status received
> during probe sequence running? Are you sure you won't loose events here?
>
>