linux-kernel - Re: [PATCH 11/15] drivers/usb/host/ehci-fsl.c: add missing iounmap

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Date:	Thu, 12 Jan 2012 11:02:59 -0500 (EST)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Julia Lawall <Julia.Lawall@...6.fr>
cc:	kernel-janitors@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...e.de>,
	<linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 11/15] drivers/usb/host/ehci-fsl.c: add missing iounmap

On Thu, 12 Jan 2012, Julia Lawall wrote:

> From: Julia Lawall <Julia.Lawall@...6.fr>
> 
> Add missing iounmap in error handling code, in a case where the function
> already preforms iounmap on some other execution path.
> 
> A simplified version of the semantic match that finds this problem is as
> follows: (http://coccinelle.lip6.fr/)
> 
> // <smpl>
> @@
> expression e;
> statement S,S1;
> int ret;
> @@
> e = \(ioremap\|ioremap_nocache\)(...)
> ... when != iounmap(e)
> if (<+...e...+>) S
> ... when any
>     when != iounmap(e)
> *if (...)
>    { ... when != iounmap(e)
>      return ...; }
> ... when any
> iounmap(e);
> // </smpl>
> 
> Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>
> 
> ---
>  drivers/usb/host/ehci-fsl.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/host/ehci-fsl.c b/drivers/usb/host/ehci-fsl.c
> index e90344a..b556a72 100644
> --- a/drivers/usb/host/ehci-fsl.c
> +++ b/drivers/usb/host/ehci-fsl.c
> @@ -125,7 +125,7 @@ static int usb_hcd_fsl_probe(const struct hc_driver *driver,
>  	 */
>  	if (pdata->init && pdata->init(pdev)) {
>  		retval = -ENODEV;
> -		goto err3;
> +		goto err4;
>  	}
>  
>  	/* Enable USB controller, 83xx or 8536 */

Acked-by: Alan Stern <stern@...land.harvard.edu>

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