From d7c146053dd195b90c79b9b8131431f44541d015 Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Wed, 18 Mar 2015 00:21:32 +0200 Subject: [PATCH] of/irq: Fix of_irq_parse_one() returned error codes The error code paths that require cleanup use a goto to jump to the cleanup code and return an error code. However, the error code variable res, which is initialized to -EINVAL when declared, is then overwritten with the return value of of_parse_phandle_with_args(), and reused as the return code from of_irq_parse_one(). This leads to an undetermined error being returned instead of the expected -EINVAL value. Fix it. Signed-off-by: Laurent Pinchart Cc: stable@vger.kernel.org # 3.13+ Signed-off-by: Rob Herring --- drivers/of/irq.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/drivers/of/irq.c b/drivers/of/irq.c index 0d7765807f49..1a7980692f25 100644 --- a/drivers/of/irq.c +++ b/drivers/of/irq.c @@ -290,7 +290,7 @@ int of_irq_parse_one(struct device_node *device, int index, struct of_phandle_ar struct device_node *p; const __be32 *intspec, *tmp, *addr; u32 intsize, intlen; - int i, res = -EINVAL; + int i, res; pr_debug("of_irq_parse_one: dev=%s, index=%d\n", of_node_full_name(device), index); @@ -323,15 +323,19 @@ int of_irq_parse_one(struct device_node *device, int index, struct of_phandle_ar /* Get size of interrupt specifier */ tmp = of_get_property(p, "#interrupt-cells", NULL); - if (tmp == NULL) + if (tmp == NULL) { + res = -EINVAL; goto out; + } intsize = be32_to_cpu(*tmp); pr_debug(" intsize=%d intlen=%d\n", intsize, intlen); /* Check index */ - if ((index + 1) * intsize > intlen) + if ((index + 1) * intsize > intlen) { + res = -EINVAL; goto out; + } /* Copy intspec into irq structure */ intspec += index * intsize; -- 2.30.2