Messages in this thread | | | Date | Fri, 27 May 2005 08:21:55 +0200 | From | Jens Axboe <> | Subject | Re: ide-cd problem in 2.6.12-rc5 + todays snapshot |
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On Thu, May 26 2005, Jens Axboe wrote: > On Thu, May 26 2005, Meelis Roos wrote: > > Background: I have a Sony CDU5211 CD drive with Intel D815EEA2 mainboard > > (ICH2 IDE in 815 chipset). Since 2.4.21 timeframe IDE DMA for this CD > > drive is broken (see my post > > http://www.ussg.iu.edu/hypermail/linux/kernel/0410.3/0480.html). This > > happens on at least 2 identical machines. This is the first problem > > (that I have learned to live with). > > > > Now, since ide-cd dma is broken, the first access to cd always gets DMA > > timeout and turns off DMA, then it works. I have hddtemp installed and > > it probes for drives on boot. In 2.6.12 (and I think I tested pristine > > 2.6.12-rc5 too) the cd works as before - dma timeout+disable on first > > access (by hddtemp). > > > > Now, in 2.6.12-rc5 + todays git snapshot, it does not work any more. I > > suspect the DMA alignment change. > > It must be, thanks for reporting this so quickly. Linus, can you exclude > that patch again? Rather miserably slow burning for some, than broken > hardware for others. > > Seems we do need finer granularity setting of alignment/length > restrictions.
BTW Meelis, any chance you can change that 3 into a 15 for testing purposes?
-- Jens Axboe
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