[PATCH v4 3/5] firmware: arm_ffa: Fix Endpoint Memory Access Descriptor offset calculation

[Sudeep Holla]

On Wed, May 20, 2026 at 08:49:46PM +0000, Mostafa Saleh wrote:
> From: Sebastian Ene <sebastianene at google.com>
> 
> Use the descriptor's `ep_mem_offset` to calculate the start of the endpoint
> memory access array and to comply with the FF-A spec instead of defaulting
> to `sizeof(struct ffa_mem_region)`.
> This requires moving `ffa_mem_region_additional_setup()` earlier in the setup
> flow.
> Also, add sanity checks to ensure the calculated descriptor offsets do not
> exceed `max_fragsize`.
> 

Core change remains same as v3 except improved error checking, so my
review still applies.

Reviewed-by: Sudeep Holla <sudeep.holla at kernel.org>

-- 
Regards,
Sudeep