linux-kernel - Re: [PATCH] scsi: lpfc: Remove unneeded return variable

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Date:   Thu, 4 Feb 2021 09:48:07 +0000
From:   Johannes Thumshirn <Johannes.Thumshirn@....com>
To:     Yang Li <yang.lee@...ux.alibaba.com>,
        "christian.koenig@....com" <christian.koenig@....com>
CC:     "sumit.semwal@...aro.org" <sumit.semwal@...aro.org>,
        "martin.petersen@...cle.com" <martin.petersen@...cle.com>,
        "jejb@...ux.ibm.com" <jejb@...ux.ibm.com>,
        "dick.kennedy@...adcom.com" <dick.kennedy@...adcom.com>,
        "james.smart@...adcom.com" <james.smart@...adcom.com>,
        "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-media@...r.kernel.org" <linux-media@...r.kernel.org>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "linaro-mm-sig@...ts.linaro.org" <linaro-mm-sig@...ts.linaro.org>
Subject: Re: [PATCH] scsi: lpfc: Remove unneeded return variable

On 04/02/2021 08:37, Yang Li wrote:
> This patch removes unneeded return variables, using only
> '1' instead.
> It fixes the following warning detected by coccinelle:
> 
> Reported-by: Abaci Robot <abaci@...ux.alibaba.com>
> Signed-off-by: Yang Li <yang.lee@...ux.alibaba.com>
> ---
>  drivers/scsi/lpfc/lpfc_sli.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c
> index 95caad7..31f97f6 100644
> --- a/drivers/scsi/lpfc/lpfc_sli.c
> +++ b/drivers/scsi/lpfc/lpfc_sli.c
> @@ -3376,7 +3376,6 @@ struct lpfc_hbq_init *lpfc_hbq_defs[] = {
>  			  struct lpfc_iocbq *saveq)
>  {
>  	struct lpfc_iocbq *cmdiocbp;
> -	int rc = 1;
>  	unsigned long iflag;
>  
>  	cmdiocbp = lpfc_sli_iocbq_lookup(phba, pring, saveq);
> @@ -3501,7 +3500,7 @@ struct lpfc_hbq_init *lpfc_hbq_defs[] = {
>  		}
>  	}
>  
> -	return rc;
> +	return 1;
>  }
>  
>  /**
> 

I suppose this is in 'lpfc_sli_process_sol_iocb()'. It's return 
value doesn't get handled either:

                case LPFC_SOL_IOCB:                                              
                        spin_unlock_irqrestore(&phba->hbalock, iflag);           
                        rc = lpfc_sli_process_sol_iocb(phba, pring, saveq);      
                        spin_lock_irqsave(&phba->hbalock, iflag);                
                        break;                                                   
[...]                                                       
                }                                                                
                                                                                 
                if (free_saveq) {                                                
                        list_for_each_entry_safe(rspiocbp, next_iocb,            
                                                 &saveq->list, list) {           
                                list_del_init(&rspiocbp->list);                  
                                __lpfc_sli_release_iocbq(phba, rspiocbp);        
                        }                                                        
                        __lpfc_sli_release_iocbq(phba, saveq);                   
                }                                                                
                rspiocbp = NULL;                                                 
        }                                                                        
        spin_unlock_irqrestore(&phba->hbalock, iflag);                           
        return rspiocbp;
}