linux-kernel - Re: [PATCH 5/15] drivers/scsi/bnx2fc/bnx2fc

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Date:	Mon, 21 Jan 2013 15:05:26 -0800
From:	"Bhanu Prakash Gollapudi" <bprakash@...adcom.com>
To:	"Julia Lawall" <Julia.Lawall@...6.fr>
cc:	kernel-janitors@...r.kernel.org,
	"James E.J. Bottomley" <JBottomley@...allels.com>,
	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 5/15] drivers/scsi/bnx2fc/bnx2fc_io.c: adjust
 duplicate test

On 01/21/2013 05:02 AM, Julia Lawall wrote:
> From: Julia Lawall <Julia.Lawall@...6.fr>
>
> Delete successive tests to the same location.  The code tested the result
> of a previous allocation, that itself was already tested.  It is changed to
> test the result of the most recent allocation.
>
> A simplified version of the semantic match that finds this problem is as
> follows: (http://coccinelle.lip6.fr/)
>
> // <smpl>
> @s exists@
> local idexpression y;
> expression x,e;
> @@
>
> *if ( \(x == NULL\|IS_ERR(x)\|y != 0\) )
>   { ... when forall
>     return ...; }
> ... when != \(y = e\|y += e\|y -= e\|y |= e\|y &= e\|y++\|y--\|&y\)
>      when != \(XT_GETPAGE(...,y)\|WMI_CMD_BUF(...)\)
> *if ( \(x == NULL\|IS_ERR(x)\|y != 0\) )
>   { ... when forall
>     return ...; }
> // </smpl>
>
> Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>
>
> ---
>   drivers/scsi/bnx2fc/bnx2fc_io.c |    2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/scsi/bnx2fc/bnx2fc_io.c b/drivers/scsi/bnx2fc/bnx2fc_io.c
> index 8d4626c..8bea53d 100644
> --- a/drivers/scsi/bnx2fc/bnx2fc_io.c
> +++ b/drivers/scsi/bnx2fc/bnx2fc_io.c
> @@ -654,7 +654,7 @@ int bnx2fc_init_mp_req(struct bnx2fc_cmd *io_req)
>   	mp_req->mp_resp_bd = dma_alloc_coherent(&hba->pcidev->dev, sz,
>   						 &mp_req->mp_resp_bd_dma,
>   						 GFP_ATOMIC);
> -	if (!mp_req->mp_req_bd) {
> +	if (!mp_req->mp_resp_bd) {
>   		printk(KERN_ERR PFX "unable to alloc MP resp bd\n");
>   		bnx2fc_free_mp_resc(io_req);
>   		return FAILED;
>
>
Acked-by: Bhanu Prakash Gollapudi <bprakash@...adcom.com>


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