[PATCH 2/2] firmware: arm_ffa: Fall back to minimum buffer size if RXTX_MAP fails

[Sudeep Holla]

On Mon, Jun 01, 2026 at 03:45:12PM -0500, Seth Forshee wrote:
> FFA_FEATURES only supports a maximum size value for RXTX_MAP in v1.2+.
> Older implementations may still reject larger sizes, which can happen
> when the minimum size is rounded up to the page size when PAGE_SIZE >
> 4K.
> 
> Fall back to the minimum size when RXTX_MAP fails with
> INVALID_PARAMETERS to fix the regression on these platforms. This also
> has the side effect of falling back for v1.2+ with a maximum of 0 (i.e.
> no maximum), where the rounded-up value isn't expected to be rejected,
> but there's no harm in retrying with a smaller size and it might even be
> of benefit for a non-compliant SPMC.
> 

Is this needed on any of your platforms ? I don't want to push a solution
or fallback/workaround if there are no users for it.

-- 
Regards,
Sudeep