linux-kernel - Re: [PATCH v2] RAS/CEC: Fix cec

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Date:   Wed, 12 Aug 2020 14:09:09 -0700
From:   Sami Tolvanen <samitolvanen@...gle.com>
To:     Luca Stefani <luca.stefani.ge1@...il.com>
Cc:     Tony Luck <tony.luck@...el.com>, Borislav Petkov <bp@...en8.de>,
        linux-edac@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] RAS/CEC: Fix cec_init prototype

Hi Luca,

On Wed, Aug 05, 2020 at 11:57:08AM +0200, Luca Stefani wrote:
> * late_initcall expects a function that returns an integer
>   -> Update the function signature to match.
> 
> Fixes: 9554bfe403nd ("x86/mce: Convert the CEC to use the MCE notifier")
> Signed-off-by: Luca Stefani <luca.stefani.ge1@...il.com>

Thank you for fixing this!

[Note that this v2 email never landed in my inbox, perhaps Gmail filtered
 it out due to a missing To: line?]

> ---
>  drivers/ras/cec.c | 9 +++++----
>  1 file changed, 5 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/ras/cec.c b/drivers/ras/cec.c
> index 569d9ad2c594..6939aa5b3dc7 100644
> --- a/drivers/ras/cec.c
> +++ b/drivers/ras/cec.c
> @@ -553,20 +553,20 @@ static struct notifier_block cec_nb = {
>  	.priority	= MCE_PRIO_CEC,
>  };
>  
> -static void __init cec_init(void)
> +static int __init cec_init(void)
>  {
>  	if (ce_arr.disabled)
> -		return;
> +		return -ENODEV;
>  
>  	ce_arr.array = (void *)get_zeroed_page(GFP_KERNEL);
>  	if (!ce_arr.array) {
>  		pr_err("Error allocating CE array page!\n");
> -		return;
> +		return -ENOMEM;
>  	}
>  
>  	if (create_debugfs_nodes()) {
>  		free_page((unsigned long)ce_arr.array);
> -		return;
> +		return -ENOMEM;
>  	}
>  
>  	INIT_DELAYED_WORK(&cec_work, cec_work_fn);
> @@ -575,6 +575,7 @@ static void __init cec_init(void)
>  	mce_register_decode_chain(&cec_nb);
>  
>  	pr_info("Correctable Errors collector initialized.\n");
> +	return 0;
>  }
>  late_initcall(cec_init);

The type mismatch broke allyesconfig in my test tree and your patch
fixes the issue. Please feel free to add:

  Reviewed-and-tested-by: Sami Tolvanen <samitolvanen@...gle.com>

Sami