Messages in this thread |  | | Subject | Re: 2.4.21-rc: lost interrupt wgen usinf atapi cdrom-drive | From | Michael Reincke <> | Date | 13 May 2003 09:37:55 +0200 |
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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!
-- 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 |
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