linux-kernel - Re: [PATCH] platform/x86: lg-laptop: fix %s null argument warning

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Date: Thu, 4 Apr 2024 12:36:19 -0700
From: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@...ux.intel.com>
To: Gergo Koteles <soyer@....hu>, Matan Ziv-Av <matan@...alib.org>,
 Hans de Goede <hdegoede@...hat.com>,
 Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Cc: platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] platform/x86: lg-laptop: fix %s null argument warning


On 4/3/24 7:34 AM, Gergo Koteles wrote:
> W=1 warns about null argument to kprintf:
> warning: ‘%s’ directive argument is null [-Wformat-overflow=]
> pr_info("product: %s  year: %d\n", product, year);
>
> Use "unknown" instead of NULL.
>
> Signed-off-by: Gergo Koteles <soyer@....hu>
> ---

Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@...ux.intel.com>

>  drivers/platform/x86/lg-laptop.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/platform/x86/lg-laptop.c b/drivers/platform/x86/lg-laptop.c
> index ad3c39e9e9f5..e714ee6298dd 100644
> --- a/drivers/platform/x86/lg-laptop.c
> +++ b/drivers/platform/x86/lg-laptop.c
> @@ -736,7 +736,7 @@ static int acpi_add(struct acpi_device *device)
>  		default:
>  			year = 2019;
>  		}
> -	pr_info("product: %s  year: %d\n", product, year);
> +	pr_info("product: %s  year: %d\n", product ?: "unknown", year);
>  
>  	if (year >= 2019)
>  		battery_limit_use_wmbb = 1;
>
> base-commit: 39cd87c4eb2b893354f3b850f916353f2658ae6f

-- 
Sathyanarayanan Kuppuswamy
Linux Kernel Developer