linux-kernel - Re: [PATCH v3 1/2] mailbox: pcc: support polling mode when there is no platform IRQ

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Message-ID: <20251203-persimmon-condor-of-essence-9fc43d@sudeepholla>
Date: Wed, 3 Dec 2025 10:28:17 +0000
From: Sudeep Holla <sudeep.holla@....com>
To: Andrea Tomassetti <andrea.tomassetti@...earl.com>
Cc: <jassisinghbrar@...il.com>, <lenb@...nel.org>,
	Sudeep Holla <sudeep.holla@....com>, <linux-acpi@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <lkp@...el.com>,
	<oe-kbuild-all@...ts.linux.dev>, <olivier.dautricourt@...earl.com>,
	<olivierdautricourt@...il.com>, <rafael@...nel.org>,
	<thibault.cantori@...earl.com>
Subject: Re: [PATCH v3 1/2] mailbox: pcc: support polling mode when there is
 no platform IRQ

On Tue, Dec 02, 2025 at 11:12:14AM +0100, Andrea Tomassetti wrote:
> The goal is to allow clients to submit a message in both irq and polling
> mode of the pcc mailbox. The ACPI specification does not require a
> platform irq for pcc channels. Let's implement the case where it is not
> available.
>

Just curious if you have a real use case for this polling mode on your
platforms or ...

> Tested-by: Thibault Cantori <thibault.cantori@...earl.com>
> Co-developed-by: Olivier Dautricourt <olivier.dautricourt@...earl.com>
> Signed-off-by: Olivier Dautricourt <olivier.dautricourt@...earl.com>
> Signed-off-by: Andrea Tomassetti <andrea.tomassetti@...earl.com>
> Reported-by: kernel test robot <lkp@...el.com>
> Closes: https://lore.kernel.org/oe-kbuild-all/202511120243.soxAFpqQ-lkp@intel.com/
> Closes: https://lore.kernel.org/oe-kbuild-all/202511120558.Cln7LF6M-lkp@intel.com/
> Closes: https://lore.kernel.org/oe-kbuild-all/202511120729.R3XQNSnx-lkp@intel.com/

You are just trying to fix these warnings. If it is latter, we don't have to
add support for polling mode especially if it can't be tested on real
platforms.

-- 
Regards,
Sudeep