Re: [PATCH] tpm, tpm_crb: Handle 64-bit resource in crb_check_resource()

[Jason Gunthorpe]

On Mon, Dec 19, 2016 at 03:56:24PM +0200, Jarkko Sakkinen wrote:
> On Sun, Dec 18, 2016 at 10:20:53PM -0600, Jiandi An wrote:
> > crb_check_resource() in TPM CRB driver calls
> > acpi_dev_resource_memory() which only handles 32-bit resources.
> > Adding a call to acpi_dev_resource_address_space() in TPM CRB
> > driver which handles 64-bit resources.
> > 
> > Signed-off-by: Jiandi An <anjiandi@xxxxxxxxxxxxxx>
> 
> 1. Is there a platform in existence where this change fixes a problem?
> 2. What is difference between "memory" and "address space" conceptually?
>    Just wondering why 32-bit stuff is "memory" and 64-bit stuff is
>    "address space". Could there be a one function that would work both
>    for 32-bit and 64-bit cases?
>    
> Yeah, I do not know this API too well. That's why I'm asking.

If this is the right thing it also needs to be done in tpm_tis.

I will point out that this driver only works with memory, so using a
generic decoder without checking for IO maps may not be correct..

Jason