linux-kernel - Re: [PATCH v2 3/3] scsi: qla2xxx: remove unused variable 'status'

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Date:   Mon, 26 Jul 2021 13:40:10 -0700
From:   Nathan Chancellor <nathan@...nel.org>
To:     Bill Wendling <morbo@...gle.com>, linux-kernel@...r.kernel.org,
        linux-scsi@...r.kernel.org, clang-built-linux@...glegroups.com,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Nilesh Javali <njavali@...vell.com>,
        GR-QLogic-Storage-Upstream@...vell.com,
        "James E . J . Bottomley" <jejb@...ux.ibm.com>,
        "Martin K . Petersen" <martin.petersen@...cle.com>
Subject: Re: [PATCH v2 3/3] scsi: qla2xxx: remove unused variable 'status'

On 7/26/2021 1:19 PM, 'Bill Wendling' via Clang Built Linux wrote:
> Fix the clang build warning:
> 
>    drivers/scsi/qla2xxx/qla_nx.c:2209:6: error: variable 'status' set but not used [-Werror,-Wunused-but-set-variable]
>          int status = 0;
> 
> Signed-off-by: Bill Wendling <morbo@...gle.com>

It has been unused since the function's introduction in commit 
a9083016a531 ("[SCSI] qla2xxx: Add ISP82XX support.").

Reviewed-by: Nathan Chancellor <nathan@...nel.org>

> ---
>   drivers/scsi/qla2xxx/qla_nx.c | 2 --
>   1 file changed, 2 deletions(-)
> 
> diff --git a/drivers/scsi/qla2xxx/qla_nx.c b/drivers/scsi/qla2xxx/qla_nx.c
> index 615e44af1ca6..11aad97dfca8 100644
> --- a/drivers/scsi/qla2xxx/qla_nx.c
> +++ b/drivers/scsi/qla2xxx/qla_nx.c
> @@ -2166,7 +2166,6 @@ qla82xx_poll(int irq, void *dev_id)
>   	struct qla_hw_data *ha;
>   	struct rsp_que *rsp;
>   	struct device_reg_82xx __iomem *reg;
> -	int status = 0;
>   	uint32_t stat;
>   	uint32_t host_int = 0;
>   	uint16_t mb[8];
> @@ -2195,7 +2194,6 @@ qla82xx_poll(int irq, void *dev_id)
>   		case 0x10:
>   		case 0x11:
>   			qla82xx_mbx_completion(vha, MSW(stat));
> -			status |= MBX_INTERRUPT;
>   			break;
>   		case 0x12:
>   			mb[0] = MSW(stat);
>