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Re: kern/42662: iop driver makes kernel crash or freeze
The following reply was made to PR kern/42662; it has been noted by GNATS.
From: Aleksej Saushev <asau%inbox.ru@localhost>
Cc: kern-bug-people%netbsd.org@localhost, gnats-admin%netbsd.org@localhost,
Subject: Re: kern/42662: iop driver makes kernel crash or freeze
Date: Sat, 30 Jan 2010 18:42:37 +0300
Manuel Bouyer <bouyer%antioche.eu.org@localhost> writes:
> On Fri, Jan 22, 2010 at 05:50:01PM +0000, Aleksej Saushev wrote:
> > 5.0_STABLE installation kernel panics when initializing iop driver,
> > 5.99.24 kernel as of 2009-01-21 crashes too,
> > 5.99.24 kernel as of today doesn't crash, it freezes instead.
> > All diagnostics below corresponds to 5.0_STABLE.
> > Kernel message at panic:
> > iop0 at pci3 dev 3 function 0: I2O adapterpanic: _bus_dmamap_sync: mix
> PRE and POST
> Can you try the attached patch on netbsd-5 ?
> No idea why it hangs on current, more info needed.
I applied it to the current instead, it crashes with the same diagnostic
message and similar backtrace, only it seems to do it a bit later.
I can try to replace as many instances of the pattern as needed,
can you recommend how many of them? All in that subroutine?
> RCS file: /cvsroot/src/sys/dev/i2o/iop.c,v
> --- iop.c 21 Oct 2009 21:12:05 -0000 1.77
> +++ iop.c 22 Jan 2010 18:03:53 -0000
> @@ -928,7 +928,7 @@ iop_status_get(struct iop_softc *sc, int
> memset(st, 0, sizeof(*st));
> bus_dmamap_sync(sc->sc_dmat, sc->sc_scr_dmamap, 0, sizeof(*st),
> - BUS_DMASYNC_PREREAD|BUS_DMASYNC_POSTWRITE);
> + BUS_DMASYNC_POSTWRITE);
> if ((rv = iop_post(sc, (u_int32_t *)&mf)) != 0)
> return (rv);
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