addition of an XPT_SCAN_TGT code

[Scott Long]

I had something similar in mind.  Glad you got there first, looks reasonable.

Scott

On May 14, 2010, at 7:15 PM, Matthew Jacob wrote:

> Sometimes, particularly in relation to a hotplug event, you just want to scan a target id, not the whole bus. It's lighter weight.
> 
> The attached patch adds this with a relatively light touch. I'm not super happy with it, but it does make rescanning on a target basis doable.
> 
> Comments?
> 
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