Re: [PATCH] firmware: arm_ffa: Unmap Rx/Tx buffers on shutdown

[Sudeep Holla <sudeep.holla@kernel.org>]

On Mon, Aug 24, 2026 at 11:33:08AM -0500, Carol Soto wrote:
> 
> On 8/19/26 2:13 PM, Carol Soto wrote:
> > 
> > On 8/19/26 2:08 AM, Sudeep Holla wrote:
> > > I had posted a single line patch here[1]. The original
> > > author/reported never
> > > got back.
> > > 
> > > -- Regards, Sudeep [1] https://lore.kernel.org/all/20260729-nostalgic-accurate-raccoon-ab7d7e@sudeepholla
> > 
> > Hi Sudeep,
> > 
> > Thanks for the pointer. I tried your patch from [1] and it fixes the
> > kexec issue on my setup.
> > 
> > I also tried limiting the shutdown patch to just RXTX_UNMAP, but that is
> > not sufficient here.
> > The next kernel can still fail notificaion setup with:
> > 
> > ARM FF-A: Notification bitmap create error -13
> > 
> > So I agree that using the normal FF-A cleanup patch from shutdown looks
> > like the right approach,
> > since it tears down the notification bitmap state as well as unmapping
> > the Rx/Tx buffers.
> > 
> > Are you planning to submit that change to resolve this issue?
> > 
> > Thanks,
> > Carol
> 
> Hi Suddep,
> 
> Just following up on the FF-A kexec issue. Do you plan to submit your
> shutdown cleanup patch, or would you prefer that I send a v2 based on that
> approach?
> 

I was away for a while, I will post it as a proper patch soon. Sorry for the
delay.

-- 
Regards,
Sudeep