Date: Wed, 08 Sep 2004 01:20:31 -0600 (MDT) From: "M. Warner Losh" <imp@bsdimp.com> To: src-committers@FreeBSD.ORG, cvs-src@FreeBSD.ORG, cvs-all@FreeBSD.ORG Subject: Re: cvs commit: src/sys/dev/usb ugen.c Message-ID: <20040908.012031.93204322.imp@bsdimp.com> In-Reply-To: <200409080713.i887Dd54058789@repoman.freebsd.org> References: <200409080713.i887Dd54058789@repoman.freebsd.org>
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In message: <200409080713.i887Dd54058789@repoman.freebsd.org>
Warner Losh <imp@FreeBSD.org> writes:
: imp 2004-09-08 07:13:39 UTC
:
: FreeBSD src repository
:
: Modified files:
: sys/dev/usb ugen.c
: Log:
: Back out 1.88.
1.87 I mean.
: The reference counts are there to block detach until the sleepers in
: read/write/ioctl have gotten out, not to prevent the open device from
: going away. Restore the old behavior so that we have a chance to wake
: up sleepers when the usb device goes away, so they can properly return
: EIO back to the caller when this happens.
:
: Otherwise, we have a guarnateed panic waiting to happen when a device
: detaches with an active read channel.
:
: This should be merged to 5 asap.
Warner
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