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

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

[Julia Lawall]

From: Julia Lawall <julia@diku.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@diku.dk>

---
 arch/arm/mach-omap2/smartreflex.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/mach-omap2/smartreflex.c b/arch/arm/mach-omap2/smartreflex.c
index fb7dc52..e8280df 100644
--- a/arch/arm/mach-omap2/smartreflex.c
+++ b/arch/arm/mach-omap2/smartreflex.c
@@ -891,7 +891,7 @@ static int __init omap_sr_probe(struct platform_device *pdev)
 		ret = sr_late_init(sr_info);
 		if (ret) {
 			pr_warning("%s: Error in SR late init\n", __func__);
-			return ret;
+			goto err_iounmap;
 		}
 	}
 

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

[Kevin Hilman]

Julia Lawall <julia@diku.dk> writes:

> From: Julia Lawall <julia@diku.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@diku.dk>

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

Tony, can you add this to devel-fixes?

Kevin