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To: Douglas Anderson <dianders@chromium.org>,
 linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org,
 Jassi Brar <jassisinghbrar@gmail.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
 =?UTF-8?Q?Andr=C3=A9_Draszik?= <andre.draszik@linaro.org>,
 Brian Norris <briannorris@chromium.org>,
 Joonwon Kang <joonwonkang@google.com>, Lucas Wei <lucaswei@google.com>,
 Peter Griffin <peter.griffin@linaro.org>,
 Subhash Jadavani <sjadavani@google.com>,
 Tudor Ambarus <tudor.ambarus@linaro.org>
References: <20260714152138.7.I5cef580a62c86ba6c3465ad336fa509afbdf1476@changeid>
Subject: Re: [PATCH 7/7] mailbox: goog-mba: Introduce the goog-mba mailbox
 driver
Content-Language: en-GB, de-DE
From: Markus Elfring <Markus.Elfring@web.de>
In-Reply-To: <20260714152138.7.I5cef580a62c86ba6c3465ad336fa509afbdf1476@changeid>
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Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org

=E2=80=A6
> +++ b/drivers/mailbox/goog-mba.c
> @@ -0,0 +1,567 @@
=E2=80=A6
> +static int goog_mba_send_data(struct mbox_chan *chan, void *msg)
> +{
=E2=80=A6
> +		spin_lock_irqsave(&goog_mbox->lock, flags);
> +		out_of_space =3D payload_words &&
> +			       (goog_mbox->outstanding_msgs >=3D
> +				goog_mbox->msg_buffer_words / payload_words);
> +		spin_unlock_irqrestore(&goog_mbox->lock, flags);
=E2=80=A6

Under which circumstances would you become interested to apply a statement
like =E2=80=9Cguard(spinlock_irqsave)(&goog_mbox->lock);=E2=80=9D?
https://elixir.bootlin.com/linux/v7.3-rc6/source/include/linux/spinlock.h#=
L642-L645

Regards,
Markus