linux-kernel - Re: [PATCH net-next] ieee802154: remove set but not used variable 'status'

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Date:   Fri, 25 Oct 2019 06:37:33 +0200
From:   Stefan Schmidt <stefan@...enfreihafen.org>
To:     YueHaibing <yuehaibing@...wei.com>, varkabhadram@...il.com,
        alex.aring@...il.com, davem@...emloft.net
Cc:     linux-wpan@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next] ieee802154: remove set but not used variable
 'status'

Hello.

On 23.10.19 09:06, YueHaibing wrote:
> Fixes gcc '-Wunused-but-set-variable' warning:
> 
> drivers/net/ieee802154/cc2520.c:221:5: warning:
>   variable status set but not used [-Wunused-but-set-variable]
> 
> It is never used, so can be removed.
> 
> Signed-off-by: YueHaibing <yuehaibing@...wei.com>
> ---
>   drivers/net/ieee802154/cc2520.c | 3 ---
>   1 file changed, 3 deletions(-)
> 
> diff --git a/drivers/net/ieee802154/cc2520.c b/drivers/net/ieee802154/cc2520.c
> index 4350694..89c046b 100644
> --- a/drivers/net/ieee802154/cc2520.c
> +++ b/drivers/net/ieee802154/cc2520.c
> @@ -218,7 +218,6 @@ static int
>   cc2520_cmd_strobe(struct cc2520_private *priv, u8 cmd)
>   {
>   	int ret;
> -	u8 status = 0xff;
>   	struct spi_message msg;
>   	struct spi_transfer xfer = {
>   		.len = 0,
> @@ -236,8 +235,6 @@ cc2520_cmd_strobe(struct cc2520_private *priv, u8 cmd)
>   		 priv->buf[0]);
>   
>   	ret = spi_sync(priv->spi, &msg);
> -	if (!ret)
> -		status = priv->buf[0];
>   	dev_vdbg(&priv->spi->dev,
>   		 "buf[0] = %02x\n", priv->buf[0]);
>   	mutex_unlock(&priv->buffer_mutex);
> 

Applied to wpan-next. Thanks!

regards
Stefan Schmidt