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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