linux-kernel - Re: [PATCH 14/14] drivers/media/usb/gspca/cpia1.c: fix error return code

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Message-ID: <504D109C.8000803@redhat.com>
Date:	Sun, 09 Sep 2012 23:56:44 +0200
From:	Hans de Goede <hdegoede@...hat.com>
To:	Peter Senna Tschudin <peter.senna@...il.com>
CC:	kernel-janitors@...r.kernel.org, Julia.Lawall@...6.fr,
	linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 14/14] drivers/media/usb/gspca/cpia1.c: fix error return
 code

Hi,

Applied to my gspca tree and included in my pull-req for 3.7 which I just send out.

Thanks,

Hans


On 09/06/2012 05:24 PM, Peter Senna Tschudin wrote:
> From: Peter Senna Tschudin <peter.senna@...il.com>
>
> Convert a nonnegative error return code to a negative one, as returned
> elsewhere in the function.
>
> A simplified version of the semantic match that finds this problem is as
> follows: (http://coccinelle.lip6.fr/)
>
> // <smpl>
> (
> if@p1 (\(ret < 0\|ret != 0\))
>   { ... return ret; }
> |
> ret@p1 = 0
> )
> ... when != ret = e1
>      when != &ret
> *if(...)
> {
>    ... when != ret = e2
>        when forall
>   return ret;
> }
>
> // </smpl>
>
> Signed-off-by: Peter Senna Tschudin <peter.senna@...il.com>
>
> ---
>   drivers/media/usb/gspca/cpia1.c |    2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/media/usb/gspca/cpia1.c b/drivers/media/usb/gspca/cpia1.c
> index 2499a88..b3ba47d 100644
> --- a/drivers/media/usb/gspca/cpia1.c
> +++ b/drivers/media/usb/gspca/cpia1.c
> @@ -751,7 +751,7 @@ static int goto_high_power(struct gspca_dev *gspca_dev)
>   	if (signal_pending(current))
>   		return -EINTR;
>
> -	do_command(gspca_dev, CPIA_COMMAND_GetCameraStatus, 0, 0, 0, 0);
> +	ret = do_command(gspca_dev, CPIA_COMMAND_GetCameraStatus, 0, 0, 0, 0);
>   	if (ret)
>   		return ret;
>
>
> --
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