Date: Fri, 31 Oct 2003 15:24:30 -0800 From: Darcy Buskermolen <darcy@wavefire.com> To: Juan Manuel Sanchez <juanmasf@mi.madritel.es>, freebsd-stable@freebsd.org Subject: Re: [PATCH] avoid kernel panic during ATA probe Message-ID: <200310311524.30836.darcy@wavefire.com> In-Reply-To: <3FA1F3ED.1010306@mi.madritel.es> References: <3FA1F3ED.1010306@mi.madritel.es>
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This patch does apear to prevent the panic as described in PR kern/57369. However the system still falls back to PIO4 when it should be capable of UDMA33 (at least) On October 30, 2003 09:32 pm, Juan Manuel Sanchez wrote: > The ata raid code in STABLE allows 15 seconds for reading the disk > headers. If during probe the ata channels need several resets to find a > working configuration that time might be exceeded. When the request > finally succeds the buffer was already freed by ar_rw(), and kernel > panics at any access to corrupt pointers. > > Try this simple patch: > > ----------------------------------------------------------------------- > Index: ata-raid.c > =================================================================== > RCS file: /usr/home/ncvs/src/sys/dev/ata/ata-raid.c,v > retrieving revision 1.3.2.19 > diff -w -u -r1.3.2.19 ata-raid.c > --- ata-raid.c 30 Jan 2003 07:19:59 -0000 1.3.2.19 > +++ ata-raid.c 30 Oct 2003 22:28:30 -0000 > @@ -1427,8 +1427,8 @@ > AR_STRATEGY((struct buf *)bp); > > if (flags & AR_WAIT) { > - while ((retry++ < (15*hz/10)) && (error = !(bp->b_flags & B_DONE))) > - error = tsleep(bp, PRIBIO, "arrw", 10); > + /* AR_STRATEGY success or timeout will wake us up */ > + error = tsleep(bp, PRIBIO, "arrw", 0); > if (!error && (bp->b_flags & B_ERROR)) > error = bp->b_error; > free(bp, M_AR); > ----------------------------------------------------------------------- > > _______________________________________________ > 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" -- Darcy Buskermolen Wavefire Technologies Corp. ph: 250.717.0200 fx: 250.763.1759 http://www.wavefire.com
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