Bug#336688: yaird also add [permanent] ide-generic
On Mon, Nov 21, 2005 at 08:39:16AM +0100, Sven Luther wrote:
> On Mon, Nov 21, 2005 at 07:33:45AM +0100, Erik van Konijnenburg wrote:
> > On Sun, Nov 20, 2005 at 11:40:00PM +0100, Sven Luther wrote:
> > > On Sun, Nov 20, 2005 at 10:19:19PM +0100, Erik van Konijnenburg wrote:
> > > > On Fri, Nov 18, 2005 at 03:36:52AM +0100, Mau wrote:
> >
> > > > > ide-generic should probably not be permanent as it's not needed to boot
> > > > > the root filesystem. Please fix!
> >
> > > > that's not handled by any other driver; if another driver is loaded after
> > > > ide-generic, the IDE devices are already claimed.
> >
> > > Notice that i believe that ide-generic will drive any ide chipset for x86, i
> > > have some doubt of it working on non-x86 arches, at least it does not work on
> > > pegasos, and i don't think it will support the powermacs ide drives.
> > >
> > > The other problem is, as you say below, that loading it before the real thing
> > > will make the real thing not work, as is the case here.
> > >
> > > > However, as long as ide-generic is loaded after the chipset drivers,
> > > > all this ambiguity should not hurt too much. For common hardware,
> > > > ide-generic is expected to be one of the last drivers loaded.
> > >
> > > Maybe the correct algorithm would be to :
> > >
> > > 1) only include ide-generic on x86 hardware.
> >
> > Doable ...
> >
> > > 2) load it after the real driver, and maybe only if the real driver didn't
> > > produce a working driver for the root device.
> >
> > This is the problematic one: piix is recognised and works, via8cxxx is recognised
> > and doesn't. How would yaird distinguish when to load ide-generic?
>
> Well, i am not so sure, maybe i misunderstand ide-generic, and it is not a
> driver per see, or an addition to existing drivers.
It seems, ide-generic is indeed a separate driver, and it needs to be loaded
later than the normal driver or not at all, or you don't get DMA on the normal
driver, which may be the cause of the piix problem, not sure.
Friendly,
Sven Luther
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