lkml.org 
[lkml]   [2003]   [May]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: 2.4.21-rc: lost interrupt wgen usinf atapi cdrom-drive
From
Date
On Tue, 2003-05-13 at 09:37, Michael Reincke wrote:
> On Tue, 2003-05-13 at 09:29, Michael Reincke wrote:
> > On Tue, 2003-05-13 at 08:21, Andrey Borzenkov wrote:
> > > > i upgraded the linux kernel of my computer from 2.4.21-pre4 to
> > > > 2.4.21-rc2 and got the following messages in syslog when using my
> > > > atapi-cdrom drive:
> > > > May 12 09:42:52 pcew80 kernel: hdc: DMA interrupt recovery
> > > > May 12 09:42:52 pcew80 kernel: hdc: lost interrupt
> > > > May 12 09:42:52 pcew80 kernel: hdc: status timeout: status=0xd0 { Busy }
> > > > May 12 09:42:52 pcew80 kernel: hdc: status timeout: error=0x00
> > > > May 12 09:42:52 pcew80 kernel: hdc: DMA disabled
> > > > May 12 09:42:52 pcew80 kernel: hdc: drive not ready for command
> > > > May 12 09:42:52 pcew80 kernel: hdc: ATAPI reset complete
> > >
> > >
> > > It smells like ide_do_request forgets to enable interrupts when
> > > request queue is empty.
> > >
> > > drivers/ide/ide-io.c:
> > >
> > > void ide_do_request (ide_hwgroup_t *hwgroup, int masked_irq)
> > > hwgroup->busy = 0;
> > >
> > > Ironically it does not release ide_intr_lock in this case but we
> > > are not on m68k so we do not care :)
> > >
> > > Could you please try to add local_irq_enable() before ide_release_lock() above and see if it helps?
> > > It has been reported to have fixed fix problems for other people. OTOH
> > > I did have sevral hard lockups with this so there may be more subtle
> > > problems issues.
> > The hangs and timeouts and total blocking of the cdrom drive seems to be
> > away, but the lost interrupt messages are still there.
> > But have in mind I've only a quick test so far.
>
> Bad news the hangs and timeout are still there!

The problem is vanishing when disabling
IO-APIC support on uniprocessors
--
Michael Reincke, NUT Team 2 (Software Build Management)

STN ATLAS Elektronik GmbH, Bremen (Germany)
E-mail : reincke.m@stn-atlas.de | mail: Sebaldsbrücker Heerstr 235
phone : +49-421-457-2302 | 28305 Bremen
fax : +49-421-457-3913 |




-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:35    [W:0.087 / U:0.416 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site