Date: Sun, 6 Apr 2008 02:13:26 +0300 From: Kostik Belousov <kostikbel@gmail.com> To: "M. Warner Losh" <imp@bsdimp.com> Cc: antik@bsd.ee, koitsu@freebsd.org, freebsd-stable@freebsd.org, freebsd-usb@freebsd.org Subject: Re: USB to RS232 converter problem (prolific chip) Message-ID: <20080405231326.GA21209@deviant.kiev.zoral.com.ua> In-Reply-To: <20080405.161010.1169637862.imp@bsdimp.com> References: <200804060024.39019.antik@bsd.ee> <200804060033.50609.antik@bsd.ee> <20080405215838.GA27195@eos.sc1.parodius.com> <20080405.161010.1169637862.imp@bsdimp.com>
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--E0GpUEom8qu4+vDz Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sat, Apr 05, 2008 at 04:10:10PM -0600, M. Warner Losh wrote: > In message: <20080405215838.GA27195@eos.sc1.parodius.com> > Jeremy Chadwick <koitsu@freebsd.org> writes: > : Bottom line: the current FreeBSD USB stack is very fragile and > : unreliable. You may want to try the usb4bsd kernel patches (I think > : that's what it's called), some have had better luck with those. Search > : the web. >=20 > This crash has nothing to do with the usb stack. The root cause is > the device deletion code nulls out a pointer. There's a routine that > is sleeping which is woken up and the null pointer gets dereferenced > leading to the crash. I believe that I fixed this in the HEAD and RELENG_7. MFC to the RELENG_6 is possible, but I have no facilities to test. >=20 > The current usb stack isn't as fragile as it was in the 5.x days. > While there are problems, this one isn't due to that. The same thing > happens when you eject a PC Card 16550 COM device, due to the same > bug. >=20 > Warner > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org" --E0GpUEom8qu4+vDz Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.8 (FreeBSD) iEYEARECAAYFAkf4B5QACgkQC3+MBN1Mb4iWUgCfeUEE6g4lETGkkSiZKU6I/AXn raYAoMOJfyQtKjoCUS9UoNwa0myahFbZ =uSSW -----END PGP SIGNATURE----- --E0GpUEom8qu4+vDz--
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