linux-kernel - Re: [PATCH] drivers/net/usb/r8152: change rtl8152_system

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Date:   Thu, 9 Aug 2018 09:42:45 +0800
From:   zhong jiang <zhongjiang@...wei.com>
To:     <davem@...emloft.net>, <edumazet@...gle.com>
CC:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] drivers/net/usb/r8152: change rtl8152_system_suspend
 to be void function

Igore the patch, will repost, Thanks
On 2018/8/8 22:26, zhong jiang wrote:
> rtl8152_system_suspend defines the variable "ret", but it is not modified
> after initialization. Further, I find that any of the callees do not
> handle the return value. So It is safe to drop the variable and make it to
> be void function.
>
> Signed-off-by: zhong jiang <zhongjiang@...wei.com>
> ---
>  drivers/net/usb/r8152.c | 7 ++-----
>  1 file changed, 2 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c
> index 124211a..cc51ac8 100644
> --- a/drivers/net/usb/r8152.c
> +++ b/drivers/net/usb/r8152.c
> @@ -4412,10 +4412,9 @@ static int rtl8152_runtime_suspend(struct r8152 *tp)
>  	return ret;
>  }
>  
> -static int rtl8152_system_suspend(struct r8152 *tp)
> +static void rtl8152_system_suspend(struct r8152 *tp)
>  {
>  	struct net_device *netdev = tp->netdev;
> -	int ret = 0;
>  
>  	netif_device_detach(netdev);
>  
> @@ -4429,8 +4428,6 @@ static int rtl8152_system_suspend(struct r8152 *tp)
>  		tp->rtl_ops.down(tp);
>  		napi_enable(napi);
>  	}
> -
> -	return ret;
>  }
>  
>  static int rtl8152_suspend(struct usb_interface *intf, pm_message_t message)
> @@ -4443,7 +4440,7 @@ static int rtl8152_suspend(struct usb_interface *intf, pm_message_t message)
>  	if (PMSG_IS_AUTO(message))
>  		ret = rtl8152_runtime_suspend(tp);
>  	else
> -		ret = rtl8152_system_suspend(tp);
> +		rtl8152_system_suspend(tp);
>  
>  	mutex_unlock(&tp->control);
>