linux-kernel - Re: [PATCH] soc: ti: fix wkup_m3_rproc_boot

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Message-ID: <87k0hipoq4.fsf@disp2133>
Date:   Mon, 08 Nov 2021 11:00:03 -0600
From:   ebiederm@...ssion.com (Eric W. Biederman)
To:     Arnd Bergmann <arnd@...nel.org>
Cc:     Santosh Shilimkar <ssantosh@...nel.org>,
        Dave Gerlach <d-gerlach@...com>,
        Tony Lindgren <tony@...mide.com>, soc@...nel.org,
        Arnd Bergmann <arnd@...db.de>,
        Lee Jones <lee.jones@...aro.org>,
        Zhen Lei <thunder.leizhen@...wei.com>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] soc: ti: fix wkup_m3_rproc_boot_thread return type

Arnd Bergmann <arnd@...nel.org> writes:

> From: Arnd Bergmann <arnd@...db.de>
>
> The wkup_m3_rproc_boot_thread() function uses a nonstandard prototype,
> which broke after Eric's recent cleanup:
>
> drivers/soc/ti/wkup_m3_ipc.c: In function 'wkup_m3_rproc_boot_thread':
> drivers/soc/ti/wkup_m3_ipc.c:429:16: error: 'return' with a value, in function returning void [-Werror=return-type]
>   429 |         return 0;
>       |                ^
> drivers/soc/ti/wkup_m3_ipc.c:416:13: note: declared here
>   416 | static void wkup_m3_rproc_boot_thread(struct wkup_m3_ipc *m3_ipc)
>       |             ^~~~~~~~~~~~~~~~~~~~~~~~~
>
> Change it to the normal prototype as it should have been from the
> start.

Thanks for catching this.  I will add it to my tree.

Eric

>
> Fixes: 111e70490d2a ("exit/kthread: Have kernel threads return instead of calling do_exit")
> Fixes: cdd5de500b2c ("soc: ti: Add wkup_m3_ipc driver")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
>  drivers/soc/ti/wkup_m3_ipc.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/soc/ti/wkup_m3_ipc.c b/drivers/soc/ti/wkup_m3_ipc.c
> index 0733443a2631..72386bd393fe 100644
> --- a/drivers/soc/ti/wkup_m3_ipc.c
> +++ b/drivers/soc/ti/wkup_m3_ipc.c
> @@ -413,8 +413,9 @@ void wkup_m3_ipc_put(struct wkup_m3_ipc *m3_ipc)
>  }
>  EXPORT_SYMBOL_GPL(wkup_m3_ipc_put);
>  
> -static void wkup_m3_rproc_boot_thread(struct wkup_m3_ipc *m3_ipc)
> +static int wkup_m3_rproc_boot_thread(void *arg)
>  {
> +	struct wkup_m3_ipc *m3_ipc = arg;
>  	struct device *dev = m3_ipc->dev;
>  	int ret;
>  
> @@ -500,7 +501,7 @@ static int wkup_m3_ipc_probe(struct platform_device *pdev)
>  	 * can boot the wkup_m3 as soon as it's ready without holding
>  	 * up kernel boot
>  	 */
> -	task = kthread_run((void *)wkup_m3_rproc_boot_thread, m3_ipc,
> +	task = kthread_run(wkup_m3_rproc_boot_thread, m3_ipc,
>  			   "wkup_m3_rproc_loader");
>  
>  	if (IS_ERR(task)) {