From: Julia Lawall <julia@diku.dk>
Date: Sat, 4 Aug 2012 23:52:33 +0000 (+0000)
Subject: arch/powerpc/kvm/e500_tlb.c: fix error return code
X-Git-Tag: omap-for-v3.8/fixes-for-merge-window-v4-signed~27^2~56^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=12ecd9570d8941c15602a11725ec9b0ede48d6c2;p=pandora-kernel.git

arch/powerpc/kvm/e500_tlb.c: fix error return code

Convert a 0 error return code to a negative one, as returned elsewhere in the
function.

A new label is also added to avoid freeing things that are known to not yet
be allocated.

A simplified version of the semantic match that finds the first problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@@
identifier ret;
expression e,e1,e2,e3,e4,x;
@@

(
if (\(ret != 0\|ret < 0\) || ...) { ... return ...; }
|
ret = 0
)
... when != ret = e1
*x = \(kmalloc\|kzalloc\|kcalloc\|devm_kzalloc\|ioremap\|ioremap_nocache\|devm_ioremap\|devm_ioremap_nocache\)(...);
... when != x = e2
    when != ret = e3
*if (x == NULL || ...)
{
  ... when != ret = e4
*  return ret;
}
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Alexander Graf <agraf@suse.de>
---

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