[Xen-devel] Re: [PATCH] watchdog, SP5100: Check if firmware has set correct value in tcobase.

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

On Wed, Mar 16, 2011 at 02:18:17PM -0700, Yinghai Lu wrote:
> 
> 
> Stefano found SP5100 TCO watchdog driver using wrong address.
> 
> [    9.148536] SP5100 TCO timer: SP5100 TCO WatchDog Timer Driver v0.01
> [    9.148628] DEBUG __ioremap_caller WARNING address=b8fe00 size=8 valid=1 
> reserved=1
> 
> and e820 said that range is RAM.
> 
> We should check if we can use that reading out. BIOS could just program wrong 
> address there.
> 
> -v2: Mike pointed out one path need one release.
> 
> Reported-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
> Signed-off-by:Yinghai Lu <yinghai@xxxxxxxxxx>
> Acked-by: Mike Waychison <mikew@xxxxxxxxxx>

Tested-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>

Stefano,

this fixes my bootup issues with your:
xen: set max_pfn_mapped to the last pfn mapped
patch. Will try the full patchset tomorrow.

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