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authorJulia Lawall <julia@diku.dk>2009-08-02 12:44:53 +0400
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2009-08-20 04:27:34 +0400
commit7a626b66bbd17e775cf2210e560b29383110290e (patch)
treea11b927014e9dd1d45eaaf95bc618ef2832b306f /arch/powerpc/sysdev/ipic.c
parent9239c89bc9c51c412b89eb8040077eaaee361326 (diff)
downloadlinux-7a626b66bbd17e775cf2210e560b29383110290e.tar.xz
powerpc/ipic: introduce missing kfree
Error handling code following a kzalloc should free the allocated data. The semantic match that finds the problem is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @r exists@ local idexpression x; statement S; expression E; identifier f,f1,l; position p1,p2; expression *ptr != NULL; @@ x@p1 = \(kmalloc\|kzalloc\|kcalloc\)(...); ... if (x == NULL) S <... when != x when != if (...) { <+...x...+> } ( x->f1 = E | (x->f1 == NULL || ...) | f(...,x->f1,...) ) ...> ( return \(0\|<+...x...+>\|ptr\); | return@p2 ...; ) @script:python@ p1 << r.p1; p2 << r.p2; @@ print "* file: %s kmalloc %s return %s" % (p1[0].file,p1[0].line,p2[0].line) // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/sysdev/ipic.c')
-rw-r--r--arch/powerpc/sysdev/ipic.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/powerpc/sysdev/ipic.c b/arch/powerpc/sysdev/ipic.c
index ebb7e5844012..cb7689c4bfbd 100644
--- a/arch/powerpc/sysdev/ipic.c
+++ b/arch/powerpc/sysdev/ipic.c
@@ -735,8 +735,10 @@ struct ipic * __init ipic_init(struct device_node *node, unsigned int flags)
ipic->irqhost = irq_alloc_host(node, IRQ_HOST_MAP_LINEAR,
NR_IPIC_INTS,
&ipic_host_ops, 0);
- if (ipic->irqhost == NULL)
+ if (ipic->irqhost == NULL) {
+ kfree(ipic);
return NULL;
+ }
ipic->regs = ioremap(res.start, res.end - res.start + 1);