Ensure proper handling of paths with appended options (after ':'),
where those options may contain a '/'.
Fixes: 7914a7c5651a ("of: support passing console options with stdout-path")
Reported-by: Peter Hurley <peter@xxxxxxxxxxxxxxxxxx>
Tested-by: Hans de Goede <hdegoede@xxxxxxxxxx>
Signed-off-by: Leif Lindholm <leif.lindholm@xxxxxxxxxx>
---
drivers/of/base.c | 21 +++++++++++++--------
drivers/of/unittest.c | 5 +++++
2 files changed, 18 insertions(+), 8 deletions(-)
diff --git a/drivers/of/base.c b/drivers/of/base.c
index 3b1aa08..2ee7265 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -714,16 +714,15 @@ 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 *p1, *p2;
+ p1 = strchrnul(path, ':');
+ p2 = strchrnul(path, '/');
+ len = (p1 < p2 ? p1 : p2) - 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 +767,12 @@ 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 +797,8 @@ 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;
diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
index aba8946..8d94349 100644
--- a/drivers/of/unittest.c
+++ b/drivers/of/unittest.c
@@ -97,6 +97,11 @@ static void __init of_selftest_find_node_by_name(void)
"option path test, subcase #1 failed\n");
of_node_put(np);
+ np = of_find_node_opts_by_path("/testcase-data/phandle-tests:test/option", &options);
+ selftest(np && !strcmp("test/option", options),
+ "option path test, subcase #2 failed\n");
+ of_node_put(np);
+
np = of_find_node_opts_by_path("/testcase-data:testoption", NULL);
selftest(np, "NULL option path test failed\n");
of_node_put(np);
--
2.1.4
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