cvs commit: src/sys/dev/ata ata-pci.c

Søren Schmidt at
Tue Jan 24 07:11:54 PST 2006

On 1/24/06, John Baldwin <jhb at> wrote:
> On Tuesday 24 January 2006 07:34, SXren Schmidt wrote:
> > sos         2006-01-24 12:34:56 UTC
> >
> >   FreeBSD src repository
> >
> >   Modified files:
> >     sys/dev/ata          ata-pci.c
> >   Log:
> >   Do not test for DMA status on legacy ATA devices. This has the
> > unfortunate side effect that legacy ATA controllers at irq14 and irq15
> > cannot share interrupts with anything else without major problems.
> >   This fixes the ATAPI DMA problems some systems/devices have seen.
> Those interrupts shouldn't be shared with anything else anyway.

Right, but in some cases they are shared or at least irq15 is on some older
systems, typically with at network card or SCSI controller. However this
didn't work before either as the previos ATA code didn't check DMA status
this early (which failed in other interesting ways, catch22 as usual)...


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