linux-kernel - Re: [PATCH 4/4 v2] firmware: stratix10-svc: Slightly simplify code

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Date:   Fri, 1 May 2020 10:40:20 -0500
From:   Richard Gong <richard.gong@...ux.intel.com>
To:     Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        gregkh@...uxfoundation.org, atull@...nel.org
Cc:     linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: Re: [PATCH 4/4 v2] firmware: stratix10-svc: Slightly simplify code

Hi,

On 4/29/20 1:52 AM, Christophe JAILLET wrote:
> Replace 'devm_kmalloc_array(... | __GFP_ZERO)' with the equivalent and
> shorter 'devm_kcalloc(...)'.
> 
It doesn't make much sense.
Actually devm_kcalloc returns devm_kmalloc_array(.., flag | __GFP_ZERO).

> 'ctrl->genpool' can not be NULL, so axe a useless test in the remove
> function.
> 
> Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
> ---
>   drivers/firmware/stratix10-svc.c | 6 ++----
>   1 file changed, 2 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/firmware/stratix10-svc.c b/drivers/firmware/stratix10-svc.c
> index 739004398877..c228337cb0a1 100644
> --- a/drivers/firmware/stratix10-svc.c
> +++ b/drivers/firmware/stratix10-svc.c
> @@ -1002,8 +1002,7 @@ static int stratix10_svc_drv_probe(struct platform_device *pdev)
>   	if (!controller)
>   		return -ENOMEM;
>   
> -	chans = devm_kmalloc_array(dev, SVC_NUM_CHANNEL,
> -				   sizeof(*chans), GFP_KERNEL | __GFP_ZERO);
> +	chans = devm_kcalloc(dev, SVC_NUM_CHANNEL, sizeof(*chans), GFP_KERNEL);
>   	if (!chans)
>   		return -ENOMEM;
>   
> @@ -1086,8 +1085,7 @@ static int stratix10_svc_drv_remove(struct platform_device *pdev)
>   		kthread_stop(ctrl->task);
>   		ctrl->task = NULL;
>   	}
> -	if (ctrl->genpool)
> -		gen_pool_destroy(ctrl->genpool);
> +	gen_pool_destroy(ctrl->genpool);
>   	list_del(&ctrl->node);
>   
>   	return 0;
> 

Regards,
Richard