On Dienstag, 13. Februar 2001 10:42, Jeremy Higdon wrote:
> On Feb 13, 10:24am, Oliver Neukum wrote:
> > > We currently support a RAID which uses vendor unique commands to do
> > > device management. We need special versions of drivers that understand
> > > the implied direction of the vendor unique commands. Under Irix, the
> > > ds interface explicitly specifies a direction, so no driver code need
> > > be changed to support this device.
> >
> > That's the problem. You'd break the interface.
> > Nevertheless, it should be done in 2.5.
>
> What if two bits were used:
>
> 0 = direction implied
> 1 = read from device
> 2 = write to device
> 3 = reserved/bidirectional
>
> Then you could maintain compatibility as long as older programs zero
> out the unused flags bits.
That could be done, but you'd never be able to drop these tables.
I'd prefer a clean break to the new interface. It's better.
Doug Gilbert is working on it.
Regards
Oliver
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