linux-kernel - RE: [EXT] [PATCH] net: qed: Remove unneeded cast from memory allocation

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Date:   Mon, 20 Apr 2020 05:11:54 +0000
From:   Michal Kalderon <mkalderon@...vell.com>
To:     Aishwarya Ramakrishnan <aishwaryarj100@...il.com>,
        Ariel Elior <aelior@...vell.com>,
        GR-everest-linux-l2 <GR-everest-linux-l2@...vell.com>,
        "David S. Miller" <davem@...emloft.net>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [EXT] [PATCH] net: qed: Remove unneeded cast from memory
 allocation

> From: Aishwarya Ramakrishnan <aishwaryarj100@...il.com>
> Sent: Sunday, April 19, 2020 7:29 PM
> 
> ----------------------------------------------------------------------
> Remove casting the values returned by memory allocation function.
> 
> Coccinelle emits WARNING: casting value returned by memory allocation
> function to struct pointer is useless.
> 
> This issue was detected by using the Coccinelle.
> 
> Signed-off-by: Aishwarya Ramakrishnan <aishwaryarj100@...il.com>
> ---
>  drivers/net/ethernet/qlogic/qed/qed_roce.c | 17 ++++++++---------
>  1 file changed, 8 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/net/ethernet/qlogic/qed/qed_roce.c
> b/drivers/net/ethernet/qlogic/qed/qed_roce.c
> index 37e70562a964..475b89903f46 100644
> --- a/drivers/net/ethernet/qlogic/qed/qed_roce.c
> +++ b/drivers/net/ethernet/qlogic/qed/qed_roce.c
> @@ -736,9 +736,9 @@ static int qed_roce_sp_destroy_qp_responder(struct
> qed_hwfn *p_hwfn,
> 
>  	p_ramrod = &p_ent->ramrod.roce_destroy_qp_resp;
> 
> -	p_ramrod_res = (struct roce_destroy_qp_resp_output_params *)
> -	    dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
> sizeof(*p_ramrod_res),
> -			       &ramrod_res_phys, GFP_KERNEL);
> +	p_ramrod_res = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
> +					  sizeof(*p_ramrod_res),
> +					  &ramrod_res_phys, GFP_KERNEL);
> 
>  	if (!p_ramrod_res) {
>  		rc = -ENOMEM;
> @@ -872,10 +872,10 @@ int qed_roce_query_qp(struct qed_hwfn
> *p_hwfn,
>  	}
> 
>  	/* Send a query responder ramrod to FW to get RQ-PSN and state */
> -	p_resp_ramrod_res = (struct roce_query_qp_resp_output_params
> *)
> -	    dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
> -			       sizeof(*p_resp_ramrod_res),
> -			       &resp_ramrod_res_phys, GFP_KERNEL);
> +	p_resp_ramrod_res =
> +		dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
> +				   sizeof(*p_resp_ramrod_res),
> +				   &resp_ramrod_res_phys, GFP_KERNEL);
>  	if (!p_resp_ramrod_res) {
>  		DP_NOTICE(p_hwfn,
>  			  "qed query qp failed: cannot allocate memory
> (ramrod)\n"); @@ -920,8 +920,7 @@ int qed_roce_query_qp(struct
> qed_hwfn *p_hwfn,
>  	}
> 
>  	/* Send a query requester ramrod to FW to get SQ-PSN and state */
> -	p_req_ramrod_res = (struct roce_query_qp_req_output_params *)
> -			   dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
> +	p_req_ramrod_res = dma_alloc_coherent(&p_hwfn->cdev->pdev-
> >dev,
>  					      sizeof(*p_req_ramrod_res),
>  					      &req_ramrod_res_phys,
>  					      GFP_KERNEL);
> --
> 2.17.1

Thanks, 

Acked-by: Michal Kalderon <michal.kalderon@...vell.com>