Re: [CFT] Bus mastering support for IDE CDROM audio

Andrew Morton
2002-01-27T06:49:24Z

Andrew Morton wrote:
>
> "Kevin P. Fleming" wrote:
> >
> > When reading from the N drive, get lots of "cdrom_pc_intr: read too
> > little data 0 < 2352",
>
> OK, thanks Kevin (Dan, Kristian, Grant..)
>
> Seems that some devices simply terminate their DMA in a normal
> manner, report no errors and don't tell us how much data they
> transferred. From my reading of the ATA spec, they're allowed
> to do that - they only need to report the transfer byte count
> in PIO mode.
>

There's an updated patch at

http://www.zip.com.au/~akpm/linux/2.4/2.4.18-pre7/ide-akpm.patch

It now supports multi-frame transfers and should fix the problem
which you observed.

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