linux-kernel - Re: [PATCH 3/5] arch/arm/mach-omap2/smartreflex.c: add missing error-handling code

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Date:	Tue, 05 Jul 2011 10:51:13 -0700
From:	Kevin Hilman <khilman@...com>
To:	Julia Lawall <julia@...u.dk>
Cc:	Tony Lindgren <tony@...mide.com>, kernel-janitors@...r.kernel.org,
	Russell King <linux@....linux.org.uk>,
	linux-omap@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/5] arch/arm/mach-omap2/smartreflex.c: add missing error-handling code

Julia Lawall <julia@...u.dk> writes:

> From: Julia Lawall <julia@...u.dk>
>
> At this point, the ioremap has taken place, so the error handling code at
> the label err_iounmap should be used rather than returning directly.
>
> The semantic match that finds this problem is as follows:
> (http://coccinelle.lip6.fr/)
>
> // <smpl>
> @r@
> identifier x;
> @@
>
> kfree(x)
>
> @@
> identifier r.x;
> expression E1!=0,E2,E3,E4;
> statement S;
> @@
>
> (
> if (<+...x...+>) S
> |
> if (...) { ... when != kfree(x)
>                when != if (...) { ... kfree(x); ... }
>                when != x = E3
> * return E1;
> }
> ... when != x = E2
> if (...) { ... when != x = E4
>  kfree(x); ... return ...; }
> )
> // </smpl>
>
> Signed-off-by: Julia Lawall <julia@...u.dk>

Acked-by: Kevin Hilman <khilman@...com>

Tony, can you add this to devel-fixes?

Kevin
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