linux-kernel - Re: [PATCH 2/7] drivers/usb/gadget/amd5536udc.c: Remove double test

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Date:	Sat, 28 Aug 2010 11:24:24 -0700 (PDT)
From:	David Brownell <david-b@...bell.net>
To:	Dan Carpenter <error27@...il.com>, Julia Lawall <julia@...u.dk>
Cc:	Thomas Dahlmann <dahlmann.thomas@...or.de>,
	kernel-janitors@...r.kernel.org,
	David Brownell <dbrownell@...rs.sourceforge.net>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	linux-geode@...ts.infradead.org, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/7] drivers/usb/gadget/amd5536udc.c: Remove double test



--- On Sat, 8/28/10, Julia Lawall <julia@...u.dk> wrote:

> From: Julia Lawall <julia@...u.dk>
> Subject: Re: [PATCH 2/7] drivers/usb/gadget/amd5536udc.c: Remove double test
> To: "Dan Carpenter" <error27@...il.com>
> Cc: "Thomas Dahlmann" <dahlmann.thomas@...or.de>, kernel-janitors@...r.kernel.org, "David Brownell" <dbrownell@...rs.sourceforge.net>, "Greg Kroah-Hartman" <gregkh@...e.de>, linux-geode@...ts.infradead.org, linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
> Date: Saturday, August 28, 2010, 9:48 AM
> The same expression is tested twice
> and the result is the same each time.
> Instead test for use_dma_ppb as in the test above.
> 
> The sematic match that finds this problem is as follows:
> (http://coccinelle.lip6.fr/)
> 
> // <smpl>
> @expression@
> expression E;
> @@
> 
> (
> * E
>   || ... || E
> |
> * E
>   && ... && E
> )
> // </smpl>
> 
> Signed-off-by: Julia Lawall <julia@...u.dk>


OK by me unless the maintainer/author objects.

Thank you!

- Dave



> 
> ---
>  drivers/usb/gadget/amd5536udc.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/gadget/amd5536udc.c
> b/drivers/usb/gadget/amd5536udc.c
> index 731150d..6c40c99 100644
> --- a/drivers/usb/gadget/amd5536udc.c
> +++ b/drivers/usb/gadget/amd5536udc.c
> @@ -203,7 +203,7 @@ static void print_regs(struct udc
> *dev)
>          DBG(dev, "DMA
> mode       = PPBNDU (packet per
> buffer "
>             
> "WITHOUT desc. update)\n");
>         
> dev_info(&dev->pdev->dev, "DMA mode (%s)\n",
> "PPBNDU");
> -    } else if (use_dma &&
> use_dma_ppb_du && use_dma_ppb_du) {
> +    } else if (use_dma &&
> use_dma_ppb && use_dma_ppb_du) {
>          DBG(dev, "DMA
> mode       = PPBDU (packet per
> buffer "
>             
> "WITH desc. update)\n");
>         
> dev_info(&dev->pdev->dev, "DMA mode (%s)\n",
> "PPBDU");
> 
> 

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