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of: fix handling of '/' in options for of_find_node_by_path()

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Ensure proper handling of paths with appended options (after ':'),
where those options may contain a '/'.

Fixes: 7914a7c565 ("of: support passing console options with stdout-path")
Reported-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org>
Cc: <stable@vger.kernel.org> # 3.19
Signed-off-by: Rob Herring <robh@kernel.org>
This commit is contained in:
Leif Lindholm 2015-03-06 16:52:53 +00:00 committed by Rob Herring
parent 649022e08e
commit 106937e8cc
1 changed files with 15 additions and 8 deletions
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23
drivers/of/base.c
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@ -714,16 +714,17 @@ static struct device_node *__of_find_node_by_path(struct device_node *parent,
const char *path)
{
struct device_node *child;
int len = strchrnul(path, '/') - path;
int term;
int len;
const char *end;
end = strchr(path, ':');
if (!end)
end = strchrnul(path, '/');
len = end - path;
if (!len)
return NULL;
term = strchrnul(path, ':') - path;
if (term < len)
len = term;
__for_each_child_of_node(parent, child) {
const char *name = strrchr(child->full_name, '/');
if (WARN(!name, "malformed device_node %s\n", child->full_name))
@ -768,8 +769,12 @@ struct device_node *of_find_node_opts_by_path(const char *path, const char **opt
/* The path could begin with an alias */
if (*path != '/') {
char *p = strchrnul(path, '/');
int len = separator ? separator - path : p - path;
int len;
const char *p = separator;
if (!p)
p = strchrnul(path, '/');
len = p - path;
/* of_aliases must not be NULL */
if (!of_aliases)
@ -794,6 +799,8 @@ struct device_node *of_find_node_opts_by_path(const char *path, const char **opt
path++; /* Increment past '/' delimiter */
np = __of_find_node_by_path(np, path);
path = strchrnul(path, '/');
if (separator && separator < path)
break;
}
raw_spin_unlock_irqrestore(&devtree_lock, flags);
return np;