linux-kernel - Re: [PATCH 09/11] Input: sur40: fix error return code

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Date:	Mon, 24 Aug 2015 12:30:31 -0700
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	Julia Lawall <Julia.Lawall@...6.fr>
Cc:	kernel-janitors@...r.kernel.org, linux-input@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 09/11] Input: sur40: fix error return code

On Sun, Aug 23, 2015 at 02:11:20AM +0200, Julia Lawall wrote:
> Propagate error code on failure.
> 
> A simplified version of the semantic match that finds this problem is as
> follows: (http://coccinelle.lip6.fr/)
> 
> // <smpl>
> @@
> identifier ret; expression e1,e2;
> @@
> (
> if (\(ret < 0\|ret != 0\))
>  { ... return ret; }
> |
> ret = 0
> )
> ... when != ret = e1
>     when != &ret
> *if(...)
> {
>   ... when != ret = e2
>       when forall
>  return ret;
> }
> // </smpl>
> 
> Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>

Applied, thank you.

> 
> ---
>  drivers/input/touchscreen/sur40.c |    1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/input/touchscreen/sur40.c b/drivers/input/touchscreen/sur40.c
> index 8be7b9b..3f11763 100644
> --- a/drivers/input/touchscreen/sur40.c
> +++ b/drivers/input/touchscreen/sur40.c
> @@ -581,6 +581,7 @@ static int sur40_probe(struct usb_interface *interface,
>  	sur40->alloc_ctx = vb2_dma_sg_init_ctx(sur40->dev);
>  	if (IS_ERR(sur40->alloc_ctx)) {
>  		dev_err(sur40->dev, "Can't allocate buffer context");
> +		error = PTR_ERR(sur40->alloc_ctx);
>  		goto err_unreg_v4l2;
>  	}
>  
> 

-- 
Dmitry
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