Re: readcd hangs in blk_execute_rq

[Meelis Roos]

> > And here it hangs. ps shows readcd is in D state, in blk_execute_rq.
> > dmesg shows lines of
> >
> > hdc: lost interrupt

Meanwhile I found out that if I eject the CD by pressing button, it
resumes its work and reports error to the user process.

> > ide-cd: cmd 0x28 timed out
> > hdc: DMA interrupt recovery
> > hdc: lost interrupt
> > hdc: status timeout: status=0xd0 { Busy }
> > hdc: status timeout: error=0x00
> > hdc: DMA disabled
> > hdc: drive not ready for command
> > hdc: ATAPI reset complete
>
> Did it previously work reliably with dma (which kernel)? Does it now
> work reliably without dma now? Do send your entire dmesg after a boot
> too, btw.

It worked in earlier 2.4 kernels (2.4.18?) with DMA - I don't remember
if it had some reliability problems. Since then, it's no dma. We have 3
such computers here (Intel D816EEA2 mainboard, this specific Sony CDrom)
and they all behave the same.

-- 
Meelis Roos (mroos@xxxxxxxx)

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