Re: [PATCH] Don't touch BARs of host bridges

[Greg KH <greg@kroah.com>]

On Fri, Dec 10, 2004 at 12:20:40AM +0000, Maciej W. Rozycki wrote:
> Hello,
> 
>  BARs of host bridges often have special meaning and AFAIK are best left 
> to be setup by the firmware or system-specific startup code and kept 
> intact by the generic resource handler.  For example a couple of host 
> bridges used for MIPS processors interpret BARs as target-mode decoders 
> for accessing host memory by PCI masters (which is quite reasonable).  
> For them it's desirable to keep their decoded address range overlapping 
> with the host RAM for simplicity if nothing else (I can imagine running 
> out of address space with lots of memory and 32-bit PCI with no DAC 
> support in the participating devices).
> 
>  This is already the case with the i386 and ppc platform-specific PCI 
> resource allocators.  Please consider the following change for the generic 
> allocator.  Currently we have a pile of hacks implemented for host bridges 
> to be left untouched and I'd be pleased to remove them.

I've applied this to my trees, and it will show up in the next -mm
release, and then on to Linus's tree after 2.6.10 is out.

Oh, and next time, I need a "Signed-off-by:" line as per
Documentation/SubmittingPatches.

thanks,

greg k-h