https://bugzilla.novell.com/show_bug.cgi?id=375836
User teheo@novell.com added comment
https://bugzilla.novell.com/show_bug.cgi?id=375836#c44
--- Comment #44 from Tejun Heo 2008-06-08 23:44:54 MDT ---
That's only theoretical possibility. Mixed legacy/native mode is possible but
hasn't been used by any vendor AFAIK. It just doesn't make much sense. Both
IDE and libata don't handle such case and no one has reported problem regarding
that.
It's probably best to avoid both IRQ 14 and 15 if the ATA controller isn't
fully in native mode. FWIW, drivers/pci/probe.c already has legacy ATA
detection code in pci_setup_device() to setup PCI BARs according to legacy IO
ports.
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