Re: Reattach/redetect allways connected umass device - is it possible ?

From: Poul-Henning Kamp <phk_at_phk.freebsd.dk>
Date: Tue, 29 Mar 2005 10:23:30 +0200
In message <20050329.011633.33548829.imp_at_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_at_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.
Received on Tue Mar 29 2005 - 06:23:42 UTC

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