kldunload DIAGNOSTIC idea...
Poul-Henning Kamp
phk at phk.freebsd.dk
Wed Jul 21 02:22:14 PDT 2004
In message <200407211010.08159.dfr at nlsystems.com>, Doug Rabson writes:
>The original intention was that drivers use the
>device_busy()/device_unbusy() counter to handle these things. In some
>cases, just calling device_busy() from fooopen() and device_unbusy()
>from fooclose() is sufficient.
That is not enough. All methods in cdevsw, and things not in cdevsw
(clone handlers, call backs, etc etc) needs to refcount.
I have a lot of this working in a tree here, and will commit it once
I have gone over it a few more times.
--
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.
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