Re: [Xen-devel] [PATCH for-4.5 2/4] xen: arm: correct off by one in xgene-storm's map_one_mmio

[Julien Grall <julien.grall@xxxxxxxxxx>]

Hi Ian,

On 11/18/2014 04:44 PM, Ian Campbell wrote:
> The callers pass the end as the pfn immediately *after* the last page to be
> mapped, therefore adding one is incorrect and causes an additional page to be
> mapped.
> 
> At the same time correct the printing of the mfn values, zero-padding them to
> 16 digits as for a paddr when they are frame numbers is just confusing.
> 
> Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
> ---
>  xen/arch/arm/platforms/xgene-storm.c |    4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/xen/arch/arm/platforms/xgene-storm.c 
> b/xen/arch/arm/platforms/xgene-storm.c
> index 29c4752..38674cd 100644
> --- a/xen/arch/arm/platforms/xgene-storm.c
> +++ b/xen/arch/arm/platforms/xgene-storm.c
> @@ -45,9 +45,9 @@ static int map_one_mmio(struct domain *d, const char *what,
>  {
>      int ret;
>  
> -    printk("Additional MMIO %"PRIpaddr"-%"PRIpaddr" (%s)\n",
> +    printk("Additional MMIO %lx-%lx (%s)\n",
>             start, end, what);
> -    ret = map_mmio_regions(d, start, end - start + 1, start);
> +    ret = map_mmio_regions(d, start, end - start, start);
>      if ( ret )
>          printk("Failed to map %s @ %"PRIpaddr" to dom%d\n",
>                 what, start, d->domain_id);

As you fixed the previous printf format. I would fix this one too.

Regards,

-- 
Julien Grall

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