linux-kernel - Re: [PATCH 4/4] firmware: ti_sci: Use devm_register_restart

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Message-ID: <ZbAzSjxbAgvvrV5l@errol.ini.cmu.edu>
Date: Tue, 23 Jan 2024 16:44:42 -0500
From: "Gabriel L. Somlo" <gsomlo@...il.com>
To: Andrew Davis <afd@...com>
Cc: Mark Rutland <mark.rutland@....com>,
	Lorenzo Pieralisi <lpieralisi@...nel.org>,
	Sebastian Reichel <sre@...nel.org>,
	Karol Gugala <kgugala@...micro.com>,
	Mateusz Holenko <mholenko@...micro.com>,
	Joel Stanley <joel@....id.au>, Mark Brown <broonie@...nel.org>,
	Orson Zhai <orsonzhai@...il.com>,
	Baolin Wang <baolin.wang@...ux.alibaba.com>,
	Chunyan Zhang <zhang.lyra@...il.com>, Lee Jones <lee@...nel.org>,
	Dmitry Osipenko <dmitry.osipenko@...labora.com>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-pm@...r.kernel.org, linux-spi@...r.kernel.org
Subject: Re: [PATCH 4/4] firmware: ti_sci: Use devm_register_restart_handler()

On Tue, Jan 23, 2024 at 10:44:43AM -0600, Andrew Davis wrote:
> Use device life-cycle managed register function to simplify probe.
> 
> Signed-off-by: Andrew Davis <afd@...com>

Reviewed-by: Gabriel Somlo <gsomlo@...il.com>

> ---
>  drivers/firmware/ti_sci.c | 14 +++++---------
>  1 file changed, 5 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/firmware/ti_sci.c b/drivers/firmware/ti_sci.c
> index 8b9a2556de16d..16501aa0b84cf 100644
> --- a/drivers/firmware/ti_sci.c
> +++ b/drivers/firmware/ti_sci.c
> @@ -103,7 +103,6 @@ struct ti_sci_desc {
>   */
>  struct ti_sci_info {
>  	struct device *dev;
> -	struct notifier_block nb;
>  	const struct ti_sci_desc *desc;
>  	struct dentry *d;
>  	void __iomem *debug_region;
> @@ -122,7 +121,6 @@ struct ti_sci_info {
>  
>  #define cl_to_ti_sci_info(c)	container_of(c, struct ti_sci_info, cl)
>  #define handle_to_ti_sci_info(h) container_of(h, struct ti_sci_info, handle)
> -#define reboot_to_ti_sci_info(n) container_of(n, struct ti_sci_info, nb)
>  
>  #ifdef CONFIG_DEBUG_FS
>  
> @@ -3254,10 +3252,9 @@ devm_ti_sci_get_resource(const struct ti_sci_handle *handle, struct device *dev,
>  }
>  EXPORT_SYMBOL_GPL(devm_ti_sci_get_resource);
>  
> -static int tisci_reboot_handler(struct notifier_block *nb, unsigned long mode,
> -				void *cmd)
> +static int tisci_reboot_handler(struct sys_off_data *data)
>  {
> -	struct ti_sci_info *info = reboot_to_ti_sci_info(nb);
> +	struct ti_sci_info *info = data->cb_data;
>  	const struct ti_sci_handle *handle = &info->handle;
>  
>  	ti_sci_cmd_core_reboot(handle);
> @@ -3400,10 +3397,9 @@ static int ti_sci_probe(struct platform_device *pdev)
>  	ti_sci_setup_ops(info);
>  
>  	if (reboot) {
> -		info->nb.notifier_call = tisci_reboot_handler;
> -		info->nb.priority = 128;
> -
> -		ret = register_restart_handler(&info->nb);
> +		ret = devm_register_restart_handler(dev,
> +						    tisci_reboot_handler,
> +						    info);
>  		if (ret) {
>  			dev_err(dev, "reboot registration fail(%d)\n", ret);
>  			goto out;
> -- 
> 2.39.2
>