Commit 64e4566f authored by Timur Tabi's avatar Timur Tabi Committed by Paul Mackerras

[POWERPC] Add null pointer check to of_find_property

Update function of_find_property() to return NULL if the device_node
passed to it is also NULL.  Otherwise, passing NULL will cause a null
pointer dereference.

Without this, the legacy_serial driver will crash if there's no
'chosen' node in the device tree.
Signed-off-by: default avatarTimur Tabi <timur@freescale.com>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent cec08e7a
...@@ -65,6 +65,9 @@ struct property *of_find_property(const struct device_node *np, ...@@ -65,6 +65,9 @@ struct property *of_find_property(const struct device_node *np,
{ {
struct property *pp; struct property *pp;
if (!np)
return NULL;
read_lock(&devtree_lock); read_lock(&devtree_lock);
for (pp = np->properties; pp != 0; pp = pp->next) { for (pp = np->properties; pp != 0; pp = pp->next) {
if (of_prop_cmp(pp->name, name) == 0) { if (of_prop_cmp(pp->name, name) == 0) {
......
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