Date: Wed, 21 Jul 2004 11:21:39 +0200 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> To: Doug Rabson <dfr@nlsystems.com> Cc: freebsd-arch@freebsd.org Subject: Re: kldunload DIAGNOSTIC idea... Message-ID: <79980.1090401699@critter.freebsd.dk> In-Reply-To: Your message of "Wed, 21 Jul 2004 10:10:07 BST." <200407211010.08159.dfr@nlsystems.com>
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In message <200407211010.08159.dfr@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@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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