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SubjectRe: [bug] ata subsystem related crash with latest -git
Benny Halevy wrote:
>
>
> On 10/18/07, *Jeff Garzik* <jeff@garzik.org <mailto:jeff@garzik.org>> wrote:
>
> Jens Axboe wrote:
> > index 4df8311..b858183 100644
> > --- a/drivers/ata/sata_mv.c
> > +++ b/drivers/ata/sata_mv.c
> > @@ -1139,6 +1139,7 @@ static void mv_fill_sg(struct
> ata_queued_cmd *qc)
> > struct mv_port_priv *pp = qc->ap->private_data;
> > struct scatterlist *sg;
> > struct mv_sg *mv_sg;
> > + int end_marked = 0;
> >
> > mv_sg = pp->sg_tbl;
> > ata_for_each_sg(sg, qc) {
> > @@ -1159,13 +1160,15 @@ static void mv_fill_sg(struct
> ata_queued_cmd *qc)
> > sg_len -= len;
> > addr += len;
> >
> > - if (!sg_len && ata_sg_is_last(sg, qc))
> > + if (!sg_len && ata_sg_is_last(sg, qc)) {
>
>
> I'm not sure, but shouldn't that be || rather than &&?

sg_len is zero at the end of each scatterlist entry, so we need to test
the additional ata_sg_is_last() condition to determine if we are really
at the end of the PRD table.

Jeff



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