Tough not 100% but I'm about 99% sure that having this kind of problem
no PCI bus would prevent any kind of proper level triggered IRQ handling
on behalf of the host controller... At least it seems very very
unlikely. (Data transfer problems are a different story of course.)
And I personally never ever expirenced *any* problems with -u1 on any
Linux systems I ever got in to my hands (startting 386sx 16MHz...).
Not even at the time I run the really buggy CMD640 mask revision for 3
years.
> For old ISA/VLB controllers its safer left as is, and nobody running a
> machine like that can realistically expect good performance without hand
> tuning stuff anyway
Sounds fairly well and is easy to implement...just adding
if (ch->pci_dev != NULL && ch->umask)
at the corresponding plase in ata_irq_request will do the trick.
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