Re: IDE problem source ?

[<cah...@po...>]

On Tue, 24 Sep 2002, Geert Uytterhoeven wrote:

> On Tue, 24 Sep 2002, [iso-8859-2] Krystian Bac=B3awski wrote:
> > I think I found place where kernel hungs up when it tries to probe IDE
> > hardware. I played a bit with ide-probe.c and found out that kernel hun=
gs
> > up on enable_irq. I've added two lines with printk. First is reached,
> > second not. Code below was cut out from ide-probe.c file,
> > probe_hwif:554-566.
> >=20
> >         __restore_flags(flags); /* local CPU only */
> >         printk("probe_hwif: enabling irq\n"); /* debug */
> >         if (hwif->hw.ack_intr && hwif->irq)
> >                 enable_irq(hwif->irq);
> >         printk("probe_hwif: irq enabled\n"); /* debug */
> >         for (unit =3D 0; unit < MAX_DRIVES; ++unit) {
> >                 ide_drive_t *drive =3D &hwif->drives[unit];
> >                 if (drive->present) {
> >                         ide_tuneproc_t *tuneproc =3D HWIF(drive)->tunep=
roc;
> >                         if (tuneproc !=3D NULL && drive->autotune =3D=
=3D 1)
> >                                 tuneproc(drive, 255);
> >                 }
> >         }
> >=20
> > I hope that information would help a bit in tracing a bug.
>=20
> What's the manufacturer and model of your disk?
>=20
> I remember fixing an issue with some WD disks many years ago, where the d=
isk
> didn't honor the `disable interrupt' IDE command, causing a lock up on A4=
000
> when interrupts were enabled.  It didn't show up on PC because on PC the =
IDE
> interrupt wasn't shared.

As ide-probe says:
hda: ST31720A, ATA DISK drive
hdb: BCD 16XA CD-ROM, ATAPI CD/DVD-ROM drive