linux-kernel - Re: [PATCH v2 0/2] remoteproc: imx_rproc: support non-blocking tx for i.MX7ULP

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Message-ID: <CAEnQRZDCMDZ=1hXSfGzAkz5kxL_xYo+fZXMmMQ_ytywRKRd0Hw@mail.gmail.com>
Date: Fri, 19 Jul 2024 11:48:12 +0300
From: Daniel Baluta <daniel.baluta@...il.com>
To: "Peng Fan (OSS)" <peng.fan@....nxp.com>
Cc: Bjorn Andersson <andersson@...nel.org>, Mathieu Poirier <mathieu.poirier@...aro.org>, 
	Shawn Guo <shawnguo@...nel.org>, Sascha Hauer <s.hauer@...gutronix.de>, 
	Pengutronix Kernel Team <kernel@...gutronix.de>, Fabio Estevam <festevam@...il.com>, 
	Daniel Baluta <daniel.baluta@....com>, Iuliana Prodan <iuliana.prodan@....com>, 
	Marek Vasut <marex@...x.de>, linux-remoteproc@...r.kernel.org, imx@...ts.linux.dev, 
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
	Peng Fan <peng.fan@....com>
Subject: Re: [PATCH v2 0/2] remoteproc: imx_rproc: support non-blocking tx for i.MX7ULP

On Fri, Jul 19, 2024 at 11:40 AM Peng Fan (OSS) <peng.fan@....nxp.com> wrote:
>
> The i.MX7ULP Cortex-A7 is under control of Cortex-M4. The i.MX7ULP Linux
> poweroff and restart rely on rpmsg driver to send a message to Cortex-M4
> firmware. Then Cortex-A7 could poweroff or restart by Cortex-M4 to
> configure the i.MX7ULP power controller properly.
>
> However the reboot and restart kernel common code use atomic notifier,
> so with blocking tx mailbox will trigger kernel dump, because of
> blocking mailbox will use wait_for_completion_timeout. In such case,
> linux no need to wait for completion.
>
> patch 1 is to support non-blocking tx mailbox channel
> patch 2 is to switch to non-blocking tx for system poweroff or restart.
>
> Based on patchset:
> https://lore.kernel.org/all/20240719-imx_rproc-v2-0-10d0268c7eb1@nxp.com/
>
> Signed-off-by: Peng Fan <peng.fan@....com>

Series looks good to me.

Reviewed-by: Daniel Baluta <daniel.baluta@....com>