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authorJulia Lawall <julia@diku.dk>2009-08-01 10:52:51 +0200
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2009-08-20 10:27:38 +1000
commit3475dd8a68a7c705bee88b143422ba02cb9a796b (patch)
treed1e9d6296fe706977c5d913b4802f2c51f07a8c9
parent7a626b66bbd17e775cf2210e560b29383110290e (diff)
powerpc/qe: 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> Acked-by: Timur Tabi <timur@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
-rw-r--r--arch/powerpc/sysdev/qe_lib/qe_ic.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/powerpc/sysdev/qe_lib/qe_ic.c b/arch/powerpc/sysdev/qe_lib/qe_ic.c
index 074905c3ee5..3faa42e03a8 100644
--- a/arch/powerpc/sysdev/qe_lib/qe_ic.c
+++ b/arch/powerpc/sysdev/qe_lib/qe_ic.c
@@ -339,8 +339,10 @@ void __init qe_ic_init(struct device_node *node, unsigned int flags,
qe_ic->irqhost = irq_alloc_host(node, IRQ_HOST_MAP_LINEAR,
NR_QE_IC_INTS, &qe_ic_host_ops, 0);
- if (qe_ic->irqhost == NULL)
+ if (qe_ic->irqhost == NULL) {
+ kfree(qe_ic);
return;
+ }
qe_ic->regs = ioremap(res.start, res.end - res.start + 1);
@@ -352,6 +354,7 @@ void __init qe_ic_init(struct device_node *node, unsigned int flags,
if (qe_ic->virq_low == NO_IRQ) {
printk(KERN_ERR "Failed to map QE_IC low IRQ\n");
+ kfree(qe_ic);
return;
}