Re: [linux-pm] Bug in PCI core

[Arjan van de Ven]

On Fri, 2006-10-13 at 16:26 +0100, Alan Cox wrote:
> Ar Gwe, 2006-10-13 am 10:29 -0400, ysgrifennodd Alan Stern:
> > > I'd like to propose that we have the pci config sysfs interface return
> > > -EIO  when it's blocked (e.g. active BIST or D3cold).  This accurately
> > > reflects the state of the device to userspace, reduces complexity, and
> > > could potentially save some memory per PCI device instance.
> > 
> > Could you resubmit your old patches and include a corresponding fix for 
> > this access problem?
> 
> And then you can fix the applications it breaks, like the X server which
> does actually want to know where all the devices are located in PCI
> space.
> 

.. but which could equally well mmap the resource from sysfs ;)


also the thing this patch does is ONLY when the device is effectively
off the bus return -EIO.
One can argue that -EAGAIN is nicer since it's only a temporary
condition though....


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