You also missed the well known point that only device drivers are broken
under Linux and that all the generic O/S code is just perfect. :-)
Gérard.
On Wed, 7 Feb 2001, Richard B. Johnson wrote:
> On Wed, 7 Feb 2001 davej@suse.de wrote:
>
> >
> > Hi Alan,
> >
> > Another driver not doing pci_enable_device() early enough.
> >
> > Dave.
> >
>
> A PCI device does not and should not be enabled to probe for resources!
> It is only devices that have BIOS that require the device to be enabled
> for memory I/O prior to downloading the BIOS into RAM. The BARs are
> read/writable (and are required to be), even when the Mem/I/O bits
> in the cmd/status register are clear.
>
> This is a required condition! You certainly don't want to write all
> ones to a decode (to find the resource length) of a live, on-line chip!
> If the chip hickups (think network chips connected to networks, on a
> warm-boot), you will trash lots of stuff in memory.
>
> It looks as though you are "fixing" drivers that are not broken and,
> in fact, are trying to do the right thing. Maybe the PCI code in the
> kernel is preventing access to resources unless the device has been
> enabled??? If so, it's broken and should be fixed, instead of all
> the drivers.
>
> Cheers,
> Dick Johnson
>
> Penguin : Linux version 2.4.1 on an i686 machine (799.53 BogoMips).
>
> "Memory is like gasoline. You use it up when you are running. Of
> course you get it all back when you reboot..."; Actual explanation
> obtained from the Micro$oft help desk.
>
>
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