Re: [PATCH V2] usb: core: Remove redundant NULL checks before kfree

[Greg KH <gregkh@linuxfoundation.org>]

On Mon, Jun 13, 2022 at 01:31:16AM +0000, cgel.zte@gmail.com wrote:
> From: Minghao Chi <chi.minghao@zte.com.cn>
> 
> Checking a pointer for NULL before calling kfree() on it is redundant,
> kfree() deals with NULL pointers just fine.
> 
> Reported-by: Zeal Robot <zealci@zte.com.cn>
> Signed-off-by: Minghao Chi <chi.minghao@zte.com.cn>
> ---
> v1->v2:
> 	remove "quirk_list = NULL"
>  drivers/usb/core/quirks.c | 5 +----
>  1 file changed, 1 insertion(+), 4 deletions(-)
> 
> diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c
> index f99a65a64588..9ec12c42db30 100644
> --- a/drivers/usb/core/quirks.c
> +++ b/drivers/usb/core/quirks.c
> @@ -56,10 +56,7 @@ static int quirks_param_set(const char *value, const
> struct kernel_param *kp)
>  		if (val[i] == ',')
>  			quirk_count++;
>  
> -	if (quirk_list) {
> -		kfree(quirk_list);
> -		quirk_list = NULL;
> -	}
> +	kfree(quirk_list);
>  
>  	quirk_list = kcalloc(quirk_count, sizeof(struct quirk_entry),
>  			     GFP_KERNEL);
> -- 
> 2.25.1
> 

Hi,

This is the friendly patch-bot of Greg Kroah-Hartman.  You have sent him
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