linux-kernel - Re: [PATCH v2 06/14] spi: spi-meson-spicc: Remove set but never used variable 'data' from meson_spicc_reset

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Message-ID: <7509786b-1a89-2238-cb74-c1662f393983@baylibre.com>
Date:   Tue, 21 Jul 2020 10:01:11 +0200
From:   Neil Armstrong <narmstrong@...libre.com>
To:     Lee Jones <lee.jones@...aro.org>, broonie@...nel.org
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-spi@...r.kernel.org, Kevin Hilman <khilman@...libre.com>,
        linux-amlogic@...ts.infradead.org
Subject: Re: [PATCH v2 06/14] spi: spi-meson-spicc: Remove set but never used
 variable 'data' from meson_spicc_reset_fifo()

On 17/07/2020 15:54, Lee Jones wrote:
> Looks like it hasn't ever been checked.
> 
> Fixes the following W=1 kernel build warning(s):
> 
>  drivers/spi/spi-meson-spicc.c: In function ‘meson_spicc_reset_fifo’:
>  drivers/spi/spi-meson-spicc.c:365:6: warning: variable ‘data’ set but not used [-Wunused-but-set-variable]
>  365 | u32 data;
>  | ^~~~
> 
> Cc: Kevin Hilman <khilman@...libre.com>
> Cc: Neil Armstrong <narmstrong@...libre.com>
> Cc: linux-amlogic@...ts.infradead.org
> Signed-off-by: Lee Jones <lee.jones@...aro.org>
> ---
>  drivers/spi/spi-meson-spicc.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/drivers/spi/spi-meson-spicc.c b/drivers/spi/spi-meson-spicc.c
> index 77f7d0e0e46ad..ecba6b4a5d85d 100644
> --- a/drivers/spi/spi-meson-spicc.c
> +++ b/drivers/spi/spi-meson-spicc.c
> @@ -362,8 +362,6 @@ static void meson_spicc_setup_xfer(struct meson_spicc_device *spicc,
>  
>  static void meson_spicc_reset_fifo(struct meson_spicc_device *spicc)
>  {
> -	u32 data;
> -
>  	if (spicc->data->has_oen)
>  		writel_bits_relaxed(SPICC_ENH_MAIN_CLK_AO,
>  				    SPICC_ENH_MAIN_CLK_AO,
> @@ -373,7 +371,7 @@ static void meson_spicc_reset_fifo(struct meson_spicc_device *spicc)
>  			    spicc->base + SPICC_TESTREG);
>  
>  	while (meson_spicc_rxready(spicc))
> -		data = readl_relaxed(spicc->base + SPICC_RXDATA);
> +		readl_relaxed(spicc->base + SPICC_RXDATA);
>  
>  	if (spicc->data->has_oen)
>  		writel_bits_relaxed(SPICC_ENH_MAIN_CLK_AO, 0,
> 

Acked-by: Neil Armstrong <narmstrong@...libre.com>