linux-kernel - Re: [PATCH] scsi: qla2xxx: remove some redundant pointer assignments

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Message-ID: <alpine.OSX.2.21.1704061421001.25469@deathstar.local>
Date:   Thu, 6 Apr 2017 14:21:42 -0700 (PDT)
From:   Himanshu Madhani <himanshu.madhani@...ium.com>
To:     Colin King <colin.king@...onical.com>
cc:     qla2xxx-upstream@...gic.com,
        "James E . J . Bottomley" <jejb@...ux.vnet.ibm.com>,
        "Martin K . Petersen" <martin.petersen@...cle.com>,
        linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org
Subject: Re: [PATCH] scsi: qla2xxx: remove some redundant pointer
 assignments



On Thu, 6 Apr 2017, 4:19am, Colin King wrote:

> From: Colin Ian King <colin.king@...onical.com>
> 
> There are several local or function parameter pointers that are
> being assigned NULL after a kfree where and these have no effect
> and hence can be removed.
> 
> Fixes various cppcheck warnings:
> 
> "Assignment of function parameter has no effect outside the
> function. Did you forget dereferencing it"
> 
> Signed-off-by: Colin Ian King <colin.king@...onical.com>
> ---
>  drivers/scsi/qla2xxx/qla_os.c | 6 ------
>  1 file changed, 6 deletions(-)
> 
> diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
> index 83d61d2142e9..1c7957903283 100644
> --- a/drivers/scsi/qla2xxx/qla_os.c
> +++ b/drivers/scsi/qla2xxx/qla_os.c
> @@ -423,7 +423,6 @@ static void qla2x00_free_req_que(struct qla_hw_data *ha, struct req_que *req)
>  		kfree(req->outstanding_cmds);
>  
>  	kfree(req);
> -	req = NULL;
>  }
>  
>  static void qla2x00_free_rsp_que(struct qla_hw_data *ha, struct rsp_que *rsp)
> @@ -439,7 +438,6 @@ static void qla2x00_free_rsp_que(struct qla_hw_data *ha, struct rsp_que *rsp)
>  		rsp->ring, rsp->dma);
>  	}
>  	kfree(rsp);
> -	rsp = NULL;
>  }
>  
>  static void qla2x00_free_queues(struct qla_hw_data *ha)
> @@ -653,7 +651,6 @@ qla2x00_sp_free_dma(void *ptr)
>  		ha->gbl_dsd_inuse -= ctx1->dsd_use_cnt;
>  		ha->gbl_dsd_avail += ctx1->dsd_use_cnt;
>  		mempool_free(ctx1, ha->ctx_mempool);
> -		ctx1 = NULL;
>  	}
>  
>  	CMD_SP(cmd) = NULL;
> @@ -3256,7 +3253,6 @@ qla2x00_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
>  	}
>  	pci_release_selected_regions(ha->pdev, ha->bars);
>  	kfree(ha);
> -	ha = NULL;
>  
>  probe_out:
>  	pci_disable_device(pdev);
> @@ -3504,7 +3500,6 @@ qla2x00_remove_one(struct pci_dev *pdev)
>  
>  	pci_release_selected_regions(ha->pdev, ha->bars);
>  	kfree(ha);
> -	ha = NULL;
>  
>  	pci_disable_pcie_error_reporting(pdev);
>  
> @@ -3568,7 +3563,6 @@ void qla2x00_free_fcports(struct scsi_qla_host *vha)
>  		list_del(&fcport->list);
>  		qla2x00_clear_loop_id(fcport);
>  		kfree(fcport);
> -		fcport = NULL;
>  	}
>  }
>  
> 

Looks Good. 

Acked-By: Himanshu Madhani <himanshu.madhani@...ium.com>