Re: ata_special_intr, ide_do_drive_cmd deadlock

From: Bartlomiej Zolnierkiewicz (B.Zolnierkiewicz@elka.pw.edu.pl)
Date: Sun Jul 07 2002 - 12:27:18 EST

On Sun, 7 Jul 2002, Zwane Mwaikambo wrote:

> On Sun, 7 Jul 2002, Zwane Mwaikambo wrote:
>
> > > If it was IDE 95, or IDE 95 on atapi device it is known, noted in 95's
> > > changelog and fixed in 96...
> >
> > On ATA disk, with 2.5.25 stock and the deadlock is still there (visual
> > inspection) in IDE 97
>
> Sorry perhaps let me elaborate, i was doing a dd if=/dev/hdX of=file then
> the drive dropped down to PIO, thats when i reckon i hit do_recalibrate.
> This was on 2.5.25.

do_recalibrate is called under lock and it tries to acquire lock, so
deadlock, you was the first to notice it and you have even added FIXME
to the code... ;-)

Do you realise that 2.5.25 have IDE 93 and it should be fixed in IDE 96.

BTW: know problem with 96 is broken ide_timer_expiry().
Attached IDE 98 (or not) prepatch should fix it. 

--
Bartlomiej

>
> Thanks,
> 	Zwane Mwaikambo
>
> --
> function.linuxpower.ca
>
>
>
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