[Bug 12320] warn_on_slowpath when playing audio CD

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http://bugzilla.kernel.org/show_bug.cgi?id=12320





------- Comment #11 from bzolnier@xxxxxxxxx  2008-12-30 04:13 -------
(In reply to comment #9)
> (In reply to comment #8)
> > It is the same problem as:
> > 
> > http://bugzilla.kernel.org/show_bug.cgi?id=11732
> > 
> > [ also http://marc.info/?l=linux-ide&m=122865770510761&w=2 ]
> > 
> > Hmm... with additional debug data it all starts to make sense now! :)
> > 
> > Borislav, it seems that ide_map_sg() need to check for REQ_TYPE_ATA_PC now that
> > DMA is allowed for such requests (so it can use sg_init_one() path for them
> > instead of the usual blk_rq_map_sg() one)?
> 
> Hmm,
> 
> shouldn't we do that for all rq's which aren't bio-backed? As a means to handle
> the more general case?

It would be even better...


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