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To: "M. Warner Losh" <imp@bsdimp.com>
From: "Poul-Henning Kamp" <phk@phk.freebsd.dk>
In-Reply-To: Your message of "Tue, 29 Mar 2005 01:16:33 PDT."
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Date: Tue, 29 Mar 2005 10:23:30 +0200
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Subject: Re: Reattach/redetect allways connected umass device - is it
	possible ? 
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In message <20050329.011633.33548829.imp@bsdimp.com>, "M. Warner Losh" writes:

>: >: Only partial.
>: >
>: >You should be getting a change notification on the first access after
>: >the change happens...
>: 
>: Right, that's what I mean by "partial".  Full support would be an interrupt
>: when a media is removed or inserted.
>
>And what hardware, apart from PC Card, actually supports this?

>From my point of view that is not really a relevant question in
this discussion.  The driver write will have to work with whatever
his hardware can do, and compensate for less than ideal support with
polling if necessary.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.