linux-kernel - Re: [PATCH 1/2] misc/pvpanic: Fix error handling in 'pvpanic_mmio

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Date:   Mon, 17 May 2021 10:40:12 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Christophe JAILLET <christophe.jaillet@...adoo.fr>
Cc:     arnd@...db.de, gregkh@...uxfoundation.org,
        mihai.carabas@...cle.com, pizhenwei@...edance.com,
        pbonzini@...hat.com, bobo.shaobowang@...wei.com,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: Re: [PATCH 1/2] misc/pvpanic: Fix error handling in
 'pvpanic_mmio_probe()'

On Sun, May 16, 2021 at 05:00:27PM +0200, Christophe JAILLET wrote:
> There is no error handling path in the probe function.
> Switch to managed resource so that errors in the probe are handled easily
> and simplify the remove function accordingly.

Either folded or separated, feel free to add to the result
Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

> Fixes: b3c0f8774668 ("misc/pvpanic: probe multiple instances")
> Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
> ---
>  drivers/misc/pvpanic/pvpanic-mmio.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/misc/pvpanic/pvpanic-mmio.c b/drivers/misc/pvpanic/pvpanic-mmio.c
> index 4c0841776087..69b31f7adf4f 100644
> --- a/drivers/misc/pvpanic/pvpanic-mmio.c
> +++ b/drivers/misc/pvpanic/pvpanic-mmio.c
> @@ -93,7 +93,7 @@ static int pvpanic_mmio_probe(struct platform_device *pdev)
>  		return -EINVAL;
>  	}
>  
> -	pi = kmalloc(sizeof(*pi), GFP_ATOMIC);
> +	pi = devm_kmalloc(dev, sizeof(*pi), GFP_ATOMIC);
>  	if (!pi)
>  		return -ENOMEM;
>  
> @@ -114,7 +114,6 @@ static int pvpanic_mmio_remove(struct platform_device *pdev)
>  	struct pvpanic_instance *pi = dev_get_drvdata(&pdev->dev);
>  
>  	pvpanic_remove(pi);
> -	kfree(pi);
>  
>  	return 0;
>  }
> -- 
> 2.30.2
> 

-- 
With Best Regards,
Andy Shevchenko