Messages in this thread | | | Date | Sun, 7 Nov 1999 15:41:40 +0100 | From | Jens Axboe <> | Subject | Re: CD-ROM patches versus IDE DMA |
| |
On Sat, Nov 06 1999, Brion Vibber wrote: > Jens, for some reason your CD-ROM patch doesn't get along with DMA for > my IDE drives. :( When booting 2.2.13 with the November 4 patch, I get IRQ > timeouts resulting in disabled DMA during the partition check. > ... > Partition check: > hda:hda: irq timeout: status=0xd0 { Busy } > hda: DMA disabled > hdb: DMA disabled > ide0: reset: success
Thanks for the nice report. The DMA timeouts are a known problem with that patch, it's fixed in the new one. Could you try this patch:
http://www.kernel.dk/nov7-2.2.diff
> not making significant changes outside the CD code where of course the > meat of the patch lies. I tried a quick obvious hack, returning this > line to ide.c: > - del_timer(&hwgroup->timer); /* Is this needed?? */
That was safe. It was a del_timer from inside the timer handler, which is not needed.
> but it changed nothing, so it looks like it was one of the safe-looking > changes (moving the timeout value to the drive struct instead of a > parameter to ide_set_handler) and I can't tell what's wrong with them.
Yes, nasty timeout handling. The patch above takes a somewhat different approach.
-- * Jens Axboe <axboe@image.dk> * Linux CD-ROM Maintainer * http://www.kernel.dk
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/
| |